From f5eb73fe90f1daa2f604e950164d671398b75873 Mon Sep 17 00:00:00 2001
From: Ryo Takaishi <ryo.takaishi.0@gmail.com>
Date: Wed, 30 Jul 2025 19:55:00 +0900
Subject: [PATCH] chore: remove annotate (annotate doesn't work well for rails
 8)

---
 Gemfile                                       |  1 -
 Gemfile.lock                                  |  4 --
 app/models/admin_profile.rb                   | 25 --------
 app/models/announcement.rb                    | 19 ------
 app/models/chat_message.rb                    | 36 -----------
 app/models/check_in.rb                        | 13 ----
 app/models/check_in_conference.rb             | 22 -------
 app/models/check_in_talk.rb                   | 22 -------
 app/models/conference.rb                      | 34 -----------
 app/models/conference_day.rb                  | 18 ------
 app/models/form_item.rb                       | 12 ----
 app/models/form_value.rb                      | 21 -------
 app/models/intermission.rb                    | 42 -------------
 app/models/keynote_session.rb                 | 42 -------------
 app/models/link.rb                            | 21 -------
 app/models/media_live_channel.rb              | 22 -------
 app/models/media_live_input.rb                | 21 -------
 app/models/media_live_input_security_group.rb | 18 ------
 app/models/media_package_channel.rb           | 18 ------
 app/models/media_package_harvest_job.rb       | 26 --------
 app/models/media_package_origin_endpoint.rb   | 20 -------
 app/models/media_package_parameter.rb         | 21 -------
 app/models/media_package_v2_channel.rb        | 20 -------
 app/models/media_package_v2_channel_group.rb  | 17 ------
 .../media_package_v2_origin_endpoint.rb       | 19 ------
 app/models/profile.rb                         | 38 ------------
 app/models/proposal.rb                        | 12 ----
 app/models/proposal_item.rb                   | 20 -------
 app/models/proposal_item_config.rb            | 25 --------
 app/models/proposal_item_config_check_box.rb  | 25 --------
 .../proposal_item_config_radio_button.rb      | 25 --------
 app/models/public_profile.rb                  | 20 -------
 app/models/registered_talk.rb                 | 11 ----
 app/models/room.rb                            | 20 -------
 app/models/session.rb                         | 42 -------------
 app/models/speaker.rb                         | 26 --------
 app/models/speaker_announcement.rb            | 22 -------
 app/models/speaker_announcement_middle.rb     | 21 -------
 app/models/speaker_invitation.rb              | 23 --------
 app/models/speaker_invitation_accept.rb       | 27 ---------
 app/models/sponsor.rb                         | 22 -------
 app/models/sponsor_attachment.rb              | 25 --------
 app/models/sponsor_attachment_logo_image.rb   | 25 --------
 app/models/sponsor_contact.rb                 | 23 --------
 app/models/sponsor_contact_invite.rb          | 22 -------
 app/models/sponsor_contact_invite_accept.rb   | 27 ---------
 app/models/sponsor_session.rb                 | 42 -------------
 app/models/sponsor_speaker_invite.rb          | 24 --------
 app/models/sponsor_speaker_invite_accept.rb   | 31 ----------
 app/models/sponsor_type.rb                    | 21 -------
 app/models/sponsors_sponsor_type.rb           | 11 ----
 app/models/stamp_rally_check_in.rb            | 19 ------
 app/models/stamp_rally_check_point.rb         | 21 -------
 app/models/stamp_rally_check_point_booth.rb   | 21 -------
 app/models/stamp_rally_check_point_finish.rb  | 21 -------
 app/models/stamp_rally_configure.rb           | 16 -----
 app/models/stats_of_registrant.rb             | 17 ------
 app/models/streaming.rb                       | 24 --------
 app/models/talk.rb                            | 43 --------------
 app/models/talk/type.rb                       |  8 ---
 app/models/talk_category.rb                   | 15 -----
 app/models/talk_difficulty.rb                 | 15 -----
 app/models/talk_time.rb                       | 19 ------
 app/models/talks_speaker.rb                   | 15 -----
 app/models/track.rb                           | 19 ------
 app/models/video.rb                           | 15 -----
 app/models/video_registration.rb              | 21 -------
 app/models/viewer_count.rb                    | 20 -------
 lib/tasks/auto_annotate_models.rake           | 59 -------------------
 spec/factories/admin_profiles.rb              | 24 --------
 spec/factories/announcements.rb               | 18 ------
 spec/factories/chat_messages.rb               | 35 -----------
 spec/factories/check_ins.rb                   | 13 ----
 spec/factories/conference_days.rb             | 18 ------
 spec/factories/conferences.rb                 | 34 -----------
 spec/factories/form_items.rb                  | 12 ----
 spec/factories/form_values.rb                 | 21 -------
 spec/factories/links.rb                       | 21 -------
 spec/factories/media_live_channels.rb         | 21 -------
 .../media_live_input_security_groups.rb       | 18 ------
 spec/factories/media_live_inputs.rb           | 21 -------
 spec/factories/media_package_channels.rb      | 17 ------
 spec/factories/media_package_harvest_jobs.rb  | 25 --------
 .../media_package_origin_endpoints.rb         | 19 ------
 spec/factories/media_package_parameters.rb    | 21 -------
 .../media_package_v2_channel_groups.rb        | 18 ------
 spec/factories/media_package_v2_channels.rb   | 20 -------
 .../media_package_v2_origin_endpoints.rb      | 20 -------
 spec/factories/profiles.rb                    | 38 ------------
 spec/factories/proposal_item_configs.rb       | 25 --------
 spec/factories/proposal_items.rb              | 20 -------
 spec/factories/proposals.rb                   | 12 ----
 spec/factories/public_profiles.rb             | 20 -------
 spec/factories/registered_talks.rb            | 11 ----
 spec/factories/rooms.rb                       | 20 -------
 .../factories/speaker_announcement_middles.rb | 20 -------
 spec/factories/speaker_announcements.rb       | 22 -------
 spec/factories/speaker_invitation_accepts.rb  | 27 ---------
 spec/factories/speaker_invitations.rb         | 23 --------
 spec/factories/speakers.rb                    | 26 --------
 spec/factories/sponsor_attachments.rb         | 25 --------
 .../sponsor_contact_invite_accepts.rb         | 27 ---------
 spec/factories/sponsor_contact_invites.rb     | 22 -------
 spec/factories/sponsor_contacts.rb            | 23 --------
 .../sponsor_speaker_invite_accepts.rb         | 31 ----------
 spec/factories/sponsor_speaker_invites.rb     | 24 --------
 spec/factories/sponsor_types.rb               | 21 -------
 spec/factories/sponsors.rb                    | 22 -------
 spec/factories/sponsors_sponsor_types.rb      | 11 ----
 spec/factories/stamp_rally_check_ins.rb       | 20 -------
 spec/factories/stats_of_registrants.rb        | 16 -----
 spec/factories/streamings.rb                  | 24 --------
 spec/factories/talk_categories.rb             | 15 -----
 spec/factories/talk_difficulties.rb           | 15 -----
 spec/factories/talk_times.rb                  | 19 ------
 spec/factories/talk_types.rb                  |  8 ---
 spec/factories/talks.rb                       | 43 --------------
 spec/factories/talks_speakers.rb              | 14 -----
 spec/factories/tracks.rb                      | 19 ------
 spec/factories/video_registrations.rb         | 21 -------
 spec/factories/videos.rb                      | 15 -----
 spec/factories/viewer_counts.rb               | 20 -------
 spec/models/chat_message_spec.rb              | 36 -----------
 spec/models/conference_spec.rb                | 34 -----------
 spec/models/form_item_spec.rb                 | 11 ----
 spec/models/form_value_spec.rb                | 21 -------
 spec/models/profile_spec.rb                   | 38 ------------
 spec/models/registered_talk_spec.rb           | 11 ----
 spec/models/speaker_announcement_spec.rb      | 21 -------
 spec/models/speaker_spec.rb                   | 26 --------
 spec/models/talk_spec.rb                      | 43 --------------
 spec/models/viewer_count_spec.rb              | 20 -------
 132 files changed, 2928 deletions(-)
 delete mode 100644 lib/tasks/auto_annotate_models.rake

diff --git a/Gemfile b/Gemfile
index 9ca4b18f5..6b3f39fc8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -42,7 +42,6 @@ group :development, :test do
   gem 'rubocop', '~> 1.56.0'
   gem 'rubocop-rails'
   gem 'rubocop-rspec'
-  gem 'annotate', require: false
 end
 
 group :development do
diff --git a/Gemfile.lock b/Gemfile.lock
index b65bf789e..258c07d7e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -81,9 +81,6 @@ GEM
       activesupport (>= 6.1)
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
-    annotate (3.2.0)
-      activerecord (>= 3.2, < 8.0)
-      rake (>= 10.4, < 14.0)
     ast (2.4.3)
     awesome_nested_set (3.8.0)
       activerecord (>= 4.0.0, < 8.1)
@@ -791,7 +788,6 @@ DEPENDENCIES
   active_hash
   activerecord-nulldb-adapter
   acts_as_list
-  annotate
   awesome_nested_set
   aws-actionmailer-ses (~> 1.0)
   aws-activejob-sqs
diff --git a/app/models/admin_profile.rb b/app/models/admin_profile.rb
index a8a63320f..86f34e73c 100644
--- a/app/models/admin_profile.rb
+++ b/app/models/admin_profile.rb
@@ -1,28 +1,3 @@
-# == Schema Information
-#
-# Table name: admin_profiles
-#
-#  id                :bigint           not null, primary key
-#  avatar_data       :text(65535)
-#  email             :string(255)
-#  name              :string(255)
-#  show_on_team_page :boolean
-#  sub               :string(255)
-#  created_at        :datetime         not null
-#  updated_at        :datetime         not null
-#  conference_id     :bigint           not null
-#  github_id         :string(255)
-#  twitter_id        :string(255)
-#
-# Indexes
-#
-#  index_admin_profiles_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 class AdminProfile < ApplicationRecord
   include ActionView::Helpers::UrlHelper
   include AvatarUploader::Attachment(:avatar)
diff --git a/app/models/announcement.rb b/app/models/announcement.rb
index 3795b287d..5fd393266 100644
--- a/app/models/announcement.rb
+++ b/app/models/announcement.rb
@@ -1,22 +1,3 @@
-# == Schema Information
-#
-# Table name: announcements
-#
-#  id            :bigint           not null, primary key
-#  body          :text(65535)
-#  publish       :boolean
-#  publish_time  :datetime
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_announcements_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 class Announcement < ApplicationRecord
   belongs_to :conference
 
diff --git a/app/models/chat_message.rb b/app/models/chat_message.rb
index fc6201185..dd1fae89d 100644
--- a/app/models/chat_message.rb
+++ b/app/models/chat_message.rb
@@ -1,39 +1,3 @@
-# == Schema Information
-#
-# Table name: chat_messages
-#
-#  id             :bigint           not null, primary key
-#  body           :text(65535)
-#  children_count :integer          default(0), not null
-#  depth          :integer          default(0), not null
-#  lft            :integer          not null
-#  message_type   :integer
-#  rgt            :integer          not null
-#  room_type      :string(255)
-#  created_at     :datetime         not null
-#  updated_at     :datetime         not null
-#  conference_id  :bigint           not null
-#  parent_id      :integer
-#  profile_id     :bigint
-#  room_id        :bigint
-#  speaker_id     :bigint
-#
-# Indexes
-#
-#  index_chat_messages_on_conference_id  (conference_id)
-#  index_chat_messages_on_lft            (lft)
-#  index_chat_messages_on_parent_id      (parent_id)
-#  index_chat_messages_on_profile_id     (profile_id)
-#  index_chat_messages_on_rgt            (rgt)
-#  index_chat_messages_on_speaker_id     (speaker_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (profile_id => profiles.id)
-#  fk_rails_...  (speaker_id => speakers.id)
-#
-
 class ChatMessage < ApplicationRecord
   acts_as_nested_set
 
diff --git a/app/models/check_in.rb b/app/models/check_in.rb
index 747b5cff3..c18e998bc 100644
--- a/app/models/check_in.rb
+++ b/app/models/check_in.rb
@@ -1,16 +1,3 @@
-# == Schema Information
-#
-# Table name: check_ins
-#
-#  id         :bigint           not null, primary key
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#  profile_id :integer
-#
-# Indexes
-#
-#  index_check_ins_on_profile_id  (profile_id)
-#
 class CheckIn < ApplicationRecord
   has_one :profile
 end
diff --git a/app/models/check_in_conference.rb b/app/models/check_in_conference.rb
index 5b3443dcc..4b7ea1c14 100644
--- a/app/models/check_in_conference.rb
+++ b/app/models/check_in_conference.rb
@@ -1,25 +1,3 @@
-# == Schema Information
-#
-# Table name: check_in_conferences
-#
-#  id                 :bigint           not null, primary key
-#  check_in_timestamp :datetime         not null
-#  created_at         :datetime         not null
-#  updated_at         :datetime         not null
-#  conference_id      :bigint           not null
-#  profile_id         :bigint           not null
-#  scanner_profile_id :bigint
-#
-# Indexes
-#
-#  index_check_in_conferences_on_conference_id  (conference_id)
-#  index_check_in_conferences_on_profile_id     (profile_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (profile_id => profiles.id)
-#
 class CheckInConference < ApplicationRecord
   belongs_to :conference
   belongs_to :profile
diff --git a/app/models/check_in_talk.rb b/app/models/check_in_talk.rb
index 54c46a216..466dea12b 100644
--- a/app/models/check_in_talk.rb
+++ b/app/models/check_in_talk.rb
@@ -1,25 +1,3 @@
-# == Schema Information
-#
-# Table name: check_in_talks
-#
-#  id                 :bigint           not null, primary key
-#  check_in_timestamp :datetime         not null
-#  created_at         :datetime         not null
-#  updated_at         :datetime         not null
-#  profile_id         :bigint           not null
-#  scanner_profile_id :bigint
-#  talk_id            :bigint           not null
-#
-# Indexes
-#
-#  index_check_in_talks_on_profile_id  (profile_id)
-#  index_check_in_talks_on_talk_id     (talk_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (profile_id => profiles.id)
-#  fk_rails_...  (talk_id => talks.id)
-#
 class CheckInTalk < ApplicationRecord
   belongs_to :talk
   belongs_to :profile
diff --git a/app/models/conference.rb b/app/models/conference.rb
index b65004265..2f29b77c8 100644
--- a/app/models/conference.rb
+++ b/app/models/conference.rb
@@ -1,37 +1,3 @@
-# == Schema Information
-#
-# Table name: conferences
-#
-#  id                         :bigint           not null, primary key
-#  abbr                       :string(255)
-#  about                      :text(65535)
-#  attendee_entry             :integer          default("attendee_entry_disabled")
-#  brief                      :string(255)
-#  capacity                   :integer
-#  cfp_result_visible         :boolean          default(FALSE)
-#  coc                        :text(65535)
-#  committee_name             :string(255)      default("CloudNative Days Committee"), not null
-#  conference_status          :string(255)      default("registered")
-#  contact_url                :text(65535)
-#  copyright                  :string(255)
-#  name                       :string(255)
-#  privacy_policy             :text(65535)
-#  privacy_policy_for_speaker :text(65535)
-#  rehearsal_mode             :boolean          default(FALSE), not null
-#  show_sponsors              :boolean          default(FALSE)
-#  show_timetable             :integer          default("show_timetable_disabled")
-#  speaker_entry              :integer          default("speaker_entry_disabled")
-#  sponsor_guideline_url      :text(65535)
-#  theme                      :text(65535)
-#  created_at                 :datetime         not null
-#  updated_at                 :datetime         not null
-#
-# Indexes
-#
-#  index_conferences_on_abbr                        (abbr)
-#  index_conferences_on_abbr_and_conference_status  (abbr,conference_status)
-#
-
 class Conference < ApplicationRecord
   # - registered
   #   - イベント開催前、もしくは2日間のイベントで1日目が終わって2日目が始まるまで
diff --git a/app/models/conference_day.rb b/app/models/conference_day.rb
index c691b8f75..18d5992b6 100644
--- a/app/models/conference_day.rb
+++ b/app/models/conference_day.rb
@@ -1,21 +1,3 @@
-# == Schema Information
-#
-# Table name: conference_days
-#
-#  id            :bigint           not null, primary key
-#  date          :date
-#  end_time      :time
-#  internal      :boolean          default(FALSE), not null
-#  start_time    :time
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint
-#
-# Indexes
-#
-#  index_conference_days_on_conference_id  (conference_id)
-#
-
 class ConferenceDay < ApplicationRecord
   has_many :talks, -> { order('conference_day_id ASC, HOUR(start_time) ASC, track_id ASC, MINUTE(start_time) ASC') }
   belongs_to :conference
diff --git a/app/models/form_item.rb b/app/models/form_item.rb
index 8b7fe8c12..95585f335 100644
--- a/app/models/form_item.rb
+++ b/app/models/form_item.rb
@@ -1,15 +1,3 @@
-# == Schema Information
-#
-# Table name: form_items
-#
-#  id            :bigint           not null, primary key
-#  attr          :string(255)
-#  name          :string(255)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :integer
-#
-
 class FormItem < ApplicationRecord
   belongs_to :conference
 
diff --git a/app/models/form_value.rb b/app/models/form_value.rb
index 39bf91ff4..b02da69d4 100644
--- a/app/models/form_value.rb
+++ b/app/models/form_value.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: form_values
-#
-#  id           :bigint           not null, primary key
-#  value        :string(255)
-#  created_at   :datetime         not null
-#  updated_at   :datetime         not null
-#  form_item_id :bigint           not null
-#  profile_id   :bigint           not null
-#
-# Indexes
-#
-#  index_form_values_on_form_item_id  (form_item_id)
-#  index_form_values_on_profile_id    (profile_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (form_item_id => form_items.id)
-#  fk_rails_...  (profile_id => profiles.id)
-#
 class FormValue < ApplicationRecord
   belongs_to :profile
   belongs_to :form_item
diff --git a/app/models/intermission.rb b/app/models/intermission.rb
index e524b72b3..8e1838a60 100644
--- a/app/models/intermission.rb
+++ b/app/models/intermission.rb
@@ -1,44 +1,2 @@
-# == Schema Information
-#
-# Table name: talks
-#
-#  id                    :bigint           not null, primary key
-#  abstract              :text(65535)
-#  acquired_seats        :integer          default(0), not null
-#  document_url          :string(255)
-#  end_offset            :integer          default(0), not null
-#  end_time              :time
-#  execution_phases      :json
-#  expected_participants :json
-#  movie_url             :string(255)
-#  number_of_seats       :integer          default(0), not null
-#  show_on_timetable     :boolean
-#  start_offset          :integer          default(0), not null
-#  start_time            :time
-#  title                 :string(255)
-#  type                  :string(255)      not null
-#  video_published       :boolean          default(FALSE), not null
-#  created_at            :datetime         not null
-#  updated_at            :datetime         not null
-#  conference_day_id     :integer
-#  conference_id         :integer
-#  sponsor_id            :integer
-#  talk_category_id      :bigint
-#  talk_difficulty_id    :bigint
-#  talk_time_id          :integer
-#  track_id              :integer
-#
-# Indexes
-#
-#  fk_rails_9c6f538eea                (type)
-#  index_talks_on_conference_id       (conference_id)
-#  index_talks_on_talk_category_id    (talk_category_id)
-#  index_talks_on_talk_difficulty_id  (talk_difficulty_id)
-#  index_talks_on_track_id            (track_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (type => talk_types.id)
-#
 class Intermission < Talk
 end
diff --git a/app/models/keynote_session.rb b/app/models/keynote_session.rb
index 29ba3a6d2..b2abc72f7 100644
--- a/app/models/keynote_session.rb
+++ b/app/models/keynote_session.rb
@@ -1,44 +1,2 @@
-# == Schema Information
-#
-# Table name: talks
-#
-#  id                    :bigint           not null, primary key
-#  abstract              :text(65535)
-#  acquired_seats        :integer          default(0), not null
-#  document_url          :string(255)
-#  end_offset            :integer          default(0), not null
-#  end_time              :time
-#  execution_phases      :json
-#  expected_participants :json
-#  movie_url             :string(255)
-#  number_of_seats       :integer          default(0), not null
-#  show_on_timetable     :boolean
-#  start_offset          :integer          default(0), not null
-#  start_time            :time
-#  title                 :string(255)
-#  type                  :string(255)      not null
-#  video_published       :boolean          default(FALSE), not null
-#  created_at            :datetime         not null
-#  updated_at            :datetime         not null
-#  conference_day_id     :integer
-#  conference_id         :integer
-#  sponsor_id            :integer
-#  talk_category_id      :bigint
-#  talk_difficulty_id    :bigint
-#  talk_time_id          :integer
-#  track_id              :integer
-#
-# Indexes
-#
-#  fk_rails_9c6f538eea                (type)
-#  index_talks_on_conference_id       (conference_id)
-#  index_talks_on_talk_category_id    (talk_category_id)
-#  index_talks_on_talk_difficulty_id  (talk_difficulty_id)
-#  index_talks_on_track_id            (track_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (type => talk_types.id)
-#
 class KeynoteSession < Talk
 end
diff --git a/app/models/link.rb b/app/models/link.rb
index 86d73da42..1c685ff97 100644
--- a/app/models/link.rb
+++ b/app/models/link.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: links
-#
-#  id            :bigint           not null, primary key
-#  description   :text(65535)
-#  title         :string(255)
-#  url           :string(255)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_links_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 class Link < ApplicationRecord
   belongs_to :conference
 end
diff --git a/app/models/media_live_channel.rb b/app/models/media_live_channel.rb
index d0f5dbae3..f70f504e1 100644
--- a/app/models/media_live_channel.rb
+++ b/app/models/media_live_channel.rb
@@ -1,25 +1,3 @@
-# == Schema Information
-#
-# Table name: media_live_channels
-#
-#  id                  :string(255)      not null, primary key
-#  created_at          :datetime         not null
-#  updated_at          :datetime         not null
-#  channel_id          :string(255)
-#  media_live_input_id :string(255)      not null
-#  streaming_id        :string(255)      not null
-#
-# Indexes
-#
-#  index_media_live_channels_on_media_live_input_id  (media_live_input_id)
-#  index_media_live_channels_on_streaming_id         (streaming_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (media_live_input_id => media_live_inputs.id)
-#  fk_rails_...  (streaming_id => streamings.id)
-#
-
 require 'aws-sdk-medialive'
 
 class MediaLiveChannel < ApplicationRecord
diff --git a/app/models/media_live_input.rb b/app/models/media_live_input.rb
index 9c3b6bdd6..3171bd1a8 100644
--- a/app/models/media_live_input.rb
+++ b/app/models/media_live_input.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: media_live_inputs
-#
-#  id                                 :string(255)      not null, primary key
-#  created_at                         :datetime         not null
-#  updated_at                         :datetime         not null
-#  input_id                           :string(255)
-#  media_live_input_security_group_id :string(255)      not null
-#  streaming_id                       :string(255)      not null
-#
-# Indexes
-#
-#  index_media_live_inputs_on_media_live_input_security_group_id  (media_live_input_security_group_id)
-#  index_media_live_inputs_on_streaming_id                        (streaming_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (media_live_input_security_group_id => media_live_input_security_groups.id)
-#  fk_rails_...  (streaming_id => streamings.id)
-#
 require 'aws-sdk-medialive'
 
 class MediaLiveInput < ApplicationRecord
diff --git a/app/models/media_live_input_security_group.rb b/app/models/media_live_input_security_group.rb
index 660fe5e56..c4689ceae 100644
--- a/app/models/media_live_input_security_group.rb
+++ b/app/models/media_live_input_security_group.rb
@@ -1,21 +1,3 @@
-# == Schema Information
-#
-# Table name: media_live_input_security_groups
-#
-#  id                      :string(255)      not null, primary key
-#  created_at              :datetime         not null
-#  updated_at              :datetime         not null
-#  input_security_group_id :string(255)
-#  streaming_id            :string(255)      not null
-#
-# Indexes
-#
-#  index_media_live_input_security_groups_on_streaming_id  (streaming_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (streaming_id => streamings.id)
-#
 require 'aws-sdk-medialive'
 
 class MediaLiveInputSecurityGroup < ApplicationRecord
diff --git a/app/models/media_package_channel.rb b/app/models/media_package_channel.rb
index f76de5719..e039351a8 100644
--- a/app/models/media_package_channel.rb
+++ b/app/models/media_package_channel.rb
@@ -1,21 +1,3 @@
-# == Schema Information
-#
-# Table name: media_package_channels
-#
-#  id           :bigint           not null, primary key
-#  channel_id   :string(255)      default("")
-#  streaming_id :string(255)
-#
-# Indexes
-#
-#  index_media_package_channels_on_channel_id    (channel_id)
-#  index_media_package_channels_on_streaming_id  (streaming_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (streaming_id => streamings.id)
-#
-
 class MediaPackageChannel < ApplicationRecord
   include MediaPackageHelper
   include EnvHelper
diff --git a/app/models/media_package_harvest_job.rb b/app/models/media_package_harvest_job.rb
index 73bc45d66..9d3977490 100644
--- a/app/models/media_package_harvest_job.rb
+++ b/app/models/media_package_harvest_job.rb
@@ -1,29 +1,3 @@
-# == Schema Information
-#
-# Table name: media_package_harvest_jobs
-#
-#  id                       :bigint           not null, primary key
-#  end_time                 :datetime
-#  start_time               :datetime
-#  status                   :string(255)
-#  conference_id            :bigint           not null
-#  job_id                   :string(255)
-#  media_package_channel_id :bigint           not null
-#  talk_id                  :bigint           not null
-#
-# Indexes
-#
-#  index_media_package_harvest_jobs_on_conference_id             (conference_id)
-#  index_media_package_harvest_jobs_on_media_package_channel_id  (media_package_channel_id)
-#  index_media_package_harvest_jobs_on_talk_id                   (talk_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (media_package_channel_id => media_package_channels.id)
-#  fk_rails_...  (talk_id => talks.id)
-#
-
 class MediaPackageHarvestJob < ApplicationRecord
   include MediaPackageHelper
   include EnvHelper
diff --git a/app/models/media_package_origin_endpoint.rb b/app/models/media_package_origin_endpoint.rb
index 0b03235bc..431244315 100644
--- a/app/models/media_package_origin_endpoint.rb
+++ b/app/models/media_package_origin_endpoint.rb
@@ -1,23 +1,3 @@
-# == Schema Information
-#
-# Table name: media_package_origin_endpoints
-#
-#  id                       :bigint           not null, primary key
-#  endpoint_id              :string(255)
-#  media_package_channel_id :bigint           not null
-#  streaming_id             :string(255)
-#
-# Indexes
-#
-#  index_media_package_origin_endpoints_on_media_package_channel_id  (media_package_channel_id)
-#  index_media_package_origin_endpoints_on_streaming_id              (streaming_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (media_package_channel_id => media_package_channels.id)
-#  fk_rails_...  (streaming_id => streamings.id)
-#
-
 class MediaPackageOriginEndpoint < ApplicationRecord
   include MediaPackageHelper
   include EnvHelper
diff --git a/app/models/media_package_parameter.rb b/app/models/media_package_parameter.rb
index 3ed5d93e7..1f0f3b2af 100644
--- a/app/models/media_package_parameter.rb
+++ b/app/models/media_package_parameter.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: media_package_parameters
-#
-#  id                       :string(255)      not null, primary key
-#  name                     :string(255)
-#  created_at               :datetime         not null
-#  updated_at               :datetime         not null
-#  media_package_channel_id :bigint           not null
-#  streaming_id             :string(255)      not null
-#
-# Indexes
-#
-#  index_media_package_parameters_on_media_package_channel_id  (media_package_channel_id)
-#  index_media_package_parameters_on_streaming_id              (streaming_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (media_package_channel_id => media_package_channels.id)
-#  fk_rails_...  (streaming_id => streamings.id)
-#
 require 'aws-sdk-medialive'
 
 class MediaPackageParameter < ApplicationRecord
diff --git a/app/models/media_package_v2_channel.rb b/app/models/media_package_v2_channel.rb
index 352e27a33..3224718a0 100644
--- a/app/models/media_package_v2_channel.rb
+++ b/app/models/media_package_v2_channel.rb
@@ -1,23 +1,3 @@
-# == Schema Information
-#
-# Table name: media_package_v2_channels
-#
-#  id                                :string(255)      not null, primary key
-#  name                              :string(255)
-#  media_package_v2_channel_group_id :string(255)
-#  streaming_id                      :string(255)      not null
-#
-# Indexes
-#
-#  index_channels_on_channel_group_id               (media_package_v2_channel_group_id)
-#  index_media_package_v2_channels_on_name          (name) UNIQUE
-#  index_media_package_v2_channels_on_streaming_id  (streaming_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (streaming_id => streamings.id)
-#
-
 require 'aws-sdk-mediapackagev2'
 
 class MediaPackageV2Channel < ApplicationRecord
diff --git a/app/models/media_package_v2_channel_group.rb b/app/models/media_package_v2_channel_group.rb
index 2cd17440c..6569987c6 100644
--- a/app/models/media_package_v2_channel_group.rb
+++ b/app/models/media_package_v2_channel_group.rb
@@ -1,20 +1,3 @@
-# == Schema Information
-#
-# Table name: media_package_v2_channel_groups
-#
-#  id           :string(255)      not null, primary key
-#  name         :string(255)
-#  streaming_id :string(255)      not null
-#
-# Indexes
-#
-#  index_media_package_v2_channel_groups_on_name          (name) UNIQUE
-#  index_media_package_v2_channel_groups_on_streaming_id  (streaming_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (streaming_id => streamings.id)
-#
 require 'aws-sdk-mediapackagev2'
 
 class MediaPackageV2ChannelGroup < ApplicationRecord
diff --git a/app/models/media_package_v2_origin_endpoint.rb b/app/models/media_package_v2_origin_endpoint.rb
index 5b7823b2a..188820ecc 100644
--- a/app/models/media_package_v2_origin_endpoint.rb
+++ b/app/models/media_package_v2_origin_endpoint.rb
@@ -1,22 +1,3 @@
-# == Schema Information
-#
-# Table name: media_package_v2_origin_endpoints
-#
-#  id                          :string(255)      not null, primary key
-#  name                        :string(255)
-#  media_package_v2_channel_id :string(255)
-#  streaming_id                :string(255)      not null
-#
-# Indexes
-#
-#  index_media_package_v2_origin_endpoints_on_name          (name) UNIQUE
-#  index_media_package_v2_origin_endpoints_on_streaming_id  (streaming_id)
-#  index_origin_endpoints_on_channel_id                     (media_package_v2_channel_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (streaming_id => streamings.id)
-#
 require 'aws-sdk-mediapackagev2'
 require 'aws-sdk-cloudfront'
 
diff --git a/app/models/profile.rb b/app/models/profile.rb
index 4b821666f..710cde5af 100644
--- a/app/models/profile.rb
+++ b/app/models/profile.rb
@@ -1,41 +1,3 @@
-# == Schema Information
-#
-# Table name: profiles
-#
-#  id                            :bigint           not null, primary key
-#  calendar_unique_code          :string(255)
-#  company_address               :string(255)
-#  company_address_level1        :string(255)
-#  company_address_level2        :string(255)
-#  company_address_line1         :string(255)
-#  company_address_line2         :string(255)
-#  company_email                 :string(255)
-#  company_fax                   :string(255)
-#  company_name                  :string(255)
-#  company_postal_code           :string(255)
-#  company_tel                   :string(255)
-#  department                    :string(255)
-#  email                         :string(255)
-#  first_name                    :string(255)
-#  first_name_kana               :string(255)
-#  last_name                     :string(255)
-#  last_name_kana                :string(255)
-#  occupation                    :string(255)
-#  participation                 :string(255)
-#  position                      :string(255)
-#  sub                           :string(255)
-#  created_at                    :datetime         not null
-#  updated_at                    :datetime         not null
-#  annual_sales_id               :integer          default(11)
-#  company_address_prefecture_id :string(255)
-#  company_name_prefix_id        :string(255)
-#  company_name_suffix_id        :string(255)
-#  conference_id                 :integer
-#  industry_id                   :integer
-#  number_of_employee_id         :integer          default(12)
-#  occupation_id                 :integer          default(34)
-#
-
 class EmailValidator < ActiveModel::EachValidator
   def validate_each(record, attribute, value)
     unless value =~ /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z/i
diff --git a/app/models/proposal.rb b/app/models/proposal.rb
index bc9cd630a..f5a2042ea 100644
--- a/app/models/proposal.rb
+++ b/app/models/proposal.rb
@@ -1,15 +1,3 @@
-# == Schema Information
-#
-# Table name: proposals
-#
-#  id            :bigint           not null, primary key
-#  status        :integer          default("registered"), not null
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :integer          not null
-#  talk_id       :integer          not null
-#
-
 class Proposal < ApplicationRecord
   enum :status, { registered: 0, accepted: 1, rejected: 2 }
   STATUS_MESSAGE = {
diff --git a/app/models/proposal_item.rb b/app/models/proposal_item.rb
index fd6e8c448..996cbf6eb 100644
--- a/app/models/proposal_item.rb
+++ b/app/models/proposal_item.rb
@@ -1,23 +1,3 @@
-# == Schema Information
-#
-# Table name: proposal_items
-#
-#  id            :bigint           not null, primary key
-#  label         :string(255)
-#  params        :json
-#  conference_id :bigint           not null
-#  talk_id       :bigint           not null
-#
-# Indexes
-#
-#  index_proposal_items_on_conference_id  (conference_id)
-#  index_proposal_items_on_talk_id        (talk_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 class ProposalItem < ApplicationRecord
   belongs_to :conference
   belongs_to :talk
diff --git a/app/models/proposal_item_config.rb b/app/models/proposal_item_config.rb
index a11020954..74b02dfe6 100644
--- a/app/models/proposal_item_config.rb
+++ b/app/models/proposal_item_config.rb
@@ -1,28 +1,3 @@
-# == Schema Information
-#
-# Table name: proposal_item_configs
-#
-#  id            :bigint           not null, primary key
-#  description   :text(65535)
-#  item_name     :string(255)
-#  item_number   :integer
-#  key           :string(255)
-#  label         :string(255)
-#  params        :json
-#  type          :string(255)
-#  value         :string(255)
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_proposal_item_configs_on_conference_id                  (conference_id)
-#  index_proposal_item_configs_on_conference_id_and_item_number  (conference_id,item_number)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 class ProposalItemConfig < ApplicationRecord
   belongs_to :conference
 end
diff --git a/app/models/proposal_item_config_check_box.rb b/app/models/proposal_item_config_check_box.rb
index 75392165d..bb02f5f19 100644
--- a/app/models/proposal_item_config_check_box.rb
+++ b/app/models/proposal_item_config_check_box.rb
@@ -1,27 +1,2 @@
-# == Schema Information
-#
-# Table name: proposal_item_configs
-#
-#  id            :bigint           not null, primary key
-#  description   :text(65535)
-#  item_name     :string(255)
-#  item_number   :integer
-#  key           :string(255)
-#  label         :string(255)
-#  params        :json
-#  type          :string(255)
-#  value         :string(255)
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_proposal_item_configs_on_conference_id                  (conference_id)
-#  index_proposal_item_configs_on_conference_id_and_item_number  (conference_id,item_number)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 class ProposalItemConfigCheckBox < ProposalItemConfig
 end
diff --git a/app/models/proposal_item_config_radio_button.rb b/app/models/proposal_item_config_radio_button.rb
index 101c7925d..f44d0345e 100644
--- a/app/models/proposal_item_config_radio_button.rb
+++ b/app/models/proposal_item_config_radio_button.rb
@@ -1,27 +1,2 @@
-# == Schema Information
-#
-# Table name: proposal_item_configs
-#
-#  id            :bigint           not null, primary key
-#  description   :text(65535)
-#  item_name     :string(255)
-#  item_number   :integer
-#  key           :string(255)
-#  label         :string(255)
-#  params        :json
-#  type          :string(255)
-#  value         :string(255)
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_proposal_item_configs_on_conference_id                  (conference_id)
-#  index_proposal_item_configs_on_conference_id_and_item_number  (conference_id,item_number)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 class ProposalItemConfigRadioButton < ProposalItemConfig
 end
diff --git a/app/models/public_profile.rb b/app/models/public_profile.rb
index 2d2bcdf19..5a5032ad6 100644
--- a/app/models/public_profile.rb
+++ b/app/models/public_profile.rb
@@ -1,23 +1,3 @@
-# == Schema Information
-#
-# Table name: public_profiles
-#
-#  id          :bigint           not null, primary key
-#  avatar_data :text(65535)
-#  is_public   :boolean          default(FALSE)
-#  nickname    :string(255)      default("")
-#  github_id   :string(255)      default("")
-#  profile_id  :bigint           not null
-#  twitter_id  :string(255)      default("")
-#
-# Indexes
-#
-#  index_public_profiles_on_profile_id  (profile_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (profile_id => profiles.id)
-#
 class PublicProfile < ApplicationRecord
   include ActionView::Helpers::UrlHelper
   include AvatarUploader::Attachment(:avatar)
diff --git a/app/models/registered_talk.rb b/app/models/registered_talk.rb
index cca288d70..61f16bb57 100644
--- a/app/models/registered_talk.rb
+++ b/app/models/registered_talk.rb
@@ -1,14 +1,3 @@
-# == Schema Information
-#
-# Table name: registered_talks
-#
-#  id         :bigint           not null, primary key
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#  profile_id :integer
-#  talk_id    :integer
-#
-
 class RegisteredTalk < ApplicationRecord
   belongs_to :talk
   belongs_to :profile
diff --git a/app/models/room.rb b/app/models/room.rb
index 7308092a9..0238dfc98 100644
--- a/app/models/room.rb
+++ b/app/models/room.rb
@@ -1,23 +1,3 @@
-# == Schema Information
-#
-# Table name: rooms
-#
-#  id              :bigint           not null, primary key
-#  description     :text(65535)
-#  name            :string(255)      not null
-#  number_of_seats :integer          default(0), not null
-#  created_at      :datetime         not null
-#  updated_at      :datetime         not null
-#  conference_id   :bigint           not null
-#
-# Indexes
-#
-#  index_rooms_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
 class Room < ApplicationRecord
   belongs_to :conference
   has_one :track
diff --git a/app/models/session.rb b/app/models/session.rb
index 7c705579f..587f0b682 100644
--- a/app/models/session.rb
+++ b/app/models/session.rb
@@ -1,44 +1,2 @@
-# == Schema Information
-#
-# Table name: talks
-#
-#  id                    :bigint           not null, primary key
-#  abstract              :text(65535)
-#  acquired_seats        :integer          default(0), not null
-#  document_url          :string(255)
-#  end_offset            :integer          default(0), not null
-#  end_time              :time
-#  execution_phases      :json
-#  expected_participants :json
-#  movie_url             :string(255)
-#  number_of_seats       :integer          default(0), not null
-#  show_on_timetable     :boolean
-#  start_offset          :integer          default(0), not null
-#  start_time            :time
-#  title                 :string(255)
-#  type                  :string(255)      not null
-#  video_published       :boolean          default(FALSE), not null
-#  created_at            :datetime         not null
-#  updated_at            :datetime         not null
-#  conference_day_id     :integer
-#  conference_id         :integer
-#  sponsor_id            :integer
-#  talk_category_id      :bigint
-#  talk_difficulty_id    :bigint
-#  talk_time_id          :integer
-#  track_id              :integer
-#
-# Indexes
-#
-#  fk_rails_9c6f538eea                (type)
-#  index_talks_on_conference_id       (conference_id)
-#  index_talks_on_talk_category_id    (talk_category_id)
-#  index_talks_on_talk_difficulty_id  (talk_difficulty_id)
-#  index_talks_on_track_id            (track_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (type => talk_types.id)
-#
 class Session < Talk
 end
diff --git a/app/models/speaker.rb b/app/models/speaker.rb
index 27754657d..aad2a4fd3 100644
--- a/app/models/speaker.rb
+++ b/app/models/speaker.rb
@@ -1,29 +1,3 @@
-# == Schema Information
-#
-# Table name: speakers
-#
-#  id                   :bigint           not null, primary key
-#  additional_documents :text(65535)
-#  avatar_data          :text(65535)
-#  company              :string(255)
-#  email                :text(65535)
-#  job_title            :string(255)
-#  name                 :string(255)
-#  name_mother_tongue   :string(255)
-#  profile              :text(65535)
-#  sub                  :text(65535)
-#  created_at           :datetime         not null
-#  updated_at           :datetime         not null
-#  conference_id        :integer
-#  github_id            :string(255)
-#  sponsor_id           :bigint
-#  twitter_id           :string(255)
-#
-# Indexes
-#
-#  index_speakers_on_conference_id_and_email  (conference_id,email)
-#
-
 class Speaker < ApplicationRecord
   include ActionView::Helpers::UrlHelper
   include AvatarUploader::Attachment(:avatar)
diff --git a/app/models/speaker_announcement.rb b/app/models/speaker_announcement.rb
index 895e3174b..88b659f76 100644
--- a/app/models/speaker_announcement.rb
+++ b/app/models/speaker_announcement.rb
@@ -1,25 +1,3 @@
-# == Schema Information
-#
-# Table name: speaker_announcements
-#
-#  id            :bigint           not null, primary key
-#  body          :text(65535)      not null
-#  publish       :boolean          default(FALSE)
-#  publish_time  :datetime         not null
-#  receiver      :integer          default("person"), not null
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_speaker_announcements_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 class SpeakerAnnouncement < ApplicationRecord
   enum :receiver, { person: 0, all_speaker: 1, only_accepted: 2, only_rejected: 3 }
   JA_RECEIVER = { person: '個人', all_speaker: '全員', only_accepted: 'CFP採択者', only_rejected: 'CFP非採択者' }.freeze
diff --git a/app/models/speaker_announcement_middle.rb b/app/models/speaker_announcement_middle.rb
index 74bf83762..3443f1158 100644
--- a/app/models/speaker_announcement_middle.rb
+++ b/app/models/speaker_announcement_middle.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: speaker_announcement_middles
-#
-#  id                      :bigint           not null, primary key
-#  created_at              :datetime         not null
-#  updated_at              :datetime         not null
-#  speaker_announcement_id :bigint           not null
-#  speaker_id              :bigint           not null
-#
-# Indexes
-#
-#  index_speaker_announcement_middles_on_speaker_announcement_id  (speaker_announcement_id)
-#  index_speaker_announcement_middles_on_speaker_id               (speaker_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (speaker_announcement_id => speaker_announcements.id)
-#  fk_rails_...  (speaker_id => speakers.id)
-#
-
 class SpeakerAnnouncementMiddle < ApplicationRecord
   belongs_to :speaker
   belongs_to :speaker_announcement
diff --git a/app/models/speaker_invitation.rb b/app/models/speaker_invitation.rb
index 3db29b784..7e201d61b 100644
--- a/app/models/speaker_invitation.rb
+++ b/app/models/speaker_invitation.rb
@@ -1,26 +1,3 @@
-# == Schema Information
-#
-# Table name: speaker_invitations
-#
-#  id            :bigint           not null, primary key
-#  email         :string(255)      not null
-#  expires_at    :datetime         not null
-#  token         :string(255)      not null
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#  talk_id       :bigint           not null
-#
-# Indexes
-#
-#  index_speaker_invitations_on_conference_id  (conference_id)
-#  index_speaker_invitations_on_talk_id        (talk_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (talk_id => talks.id)
-#
 class SpeakerInvitation < ApplicationRecord
   belongs_to :talk
   belongs_to :conference
diff --git a/app/models/speaker_invitation_accept.rb b/app/models/speaker_invitation_accept.rb
index 240a53304..bc38b5634 100644
--- a/app/models/speaker_invitation_accept.rb
+++ b/app/models/speaker_invitation_accept.rb
@@ -1,30 +1,3 @@
-# == Schema Information
-#
-# Table name: speaker_invitation_accepts
-#
-#  id                    :bigint           not null, primary key
-#  created_at            :datetime         not null
-#  updated_at            :datetime         not null
-#  conference_id         :bigint           not null
-#  speaker_id            :bigint           not null
-#  speaker_invitation_id :bigint           not null
-#  talk_id               :bigint           not null
-#
-# Indexes
-#
-#  index_speaker_invitation_accepts_on_conference_id            (conference_id)
-#  index_speaker_invitation_accepts_on_conference_speaker_talk  (conference_id,speaker_id,talk_id) UNIQUE
-#  index_speaker_invitation_accepts_on_speaker_id               (speaker_id)
-#  index_speaker_invitation_accepts_on_speaker_invitation_id    (speaker_invitation_id)
-#  index_speaker_invitation_accepts_on_talk_id                  (talk_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (speaker_id => speakers.id)
-#  fk_rails_...  (speaker_invitation_id => speaker_invitations.id)
-#  fk_rails_...  (talk_id => talks.id)
-#
 class SpeakerInvitationAccept < ApplicationRecord
   belongs_to :speaker_invitation
   belongs_to :conference
diff --git a/app/models/sponsor.rb b/app/models/sponsor.rb
index b956e8192..259312d4b 100644
--- a/app/models/sponsor.rb
+++ b/app/models/sponsor.rb
@@ -1,25 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsors
-#
-#  id            :bigint           not null, primary key
-#  abbr          :string(255)
-#  description   :text(65535)
-#  name          :string(255)
-#  url           :string(255)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_sponsors_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 class Sponsor < ApplicationRecord
   belongs_to :conference
 
diff --git a/app/models/sponsor_attachment.rb b/app/models/sponsor_attachment.rb
index a6f181864..8c0175e03 100644
--- a/app/models/sponsor_attachment.rb
+++ b/app/models/sponsor_attachment.rb
@@ -1,28 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsor_attachments
-#
-#  id         :bigint           not null, primary key
-#  file_data  :string(255)
-#  link       :string(255)
-#  public     :boolean
-#  text       :text(65535)
-#  title      :string(255)
-#  type       :string(255)
-#  url        :string(255)
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#  sponsor_id :bigint           not null
-#
-# Indexes
-#
-#  index_sponsor_attachments_on_sponsor_id  (sponsor_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (sponsor_id => sponsors.id)
-#
-
 class SponsorAttachment < ApplicationRecord
   belongs_to :sponsor
 end
diff --git a/app/models/sponsor_attachment_logo_image.rb b/app/models/sponsor_attachment_logo_image.rb
index 4186f9cb3..c4df24602 100644
--- a/app/models/sponsor_attachment_logo_image.rb
+++ b/app/models/sponsor_attachment_logo_image.rb
@@ -1,28 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsor_attachments
-#
-#  id         :bigint           not null, primary key
-#  file_data  :string(255)
-#  link       :string(255)
-#  public     :boolean
-#  text       :text(65535)
-#  title      :string(255)
-#  type       :string(255)
-#  url        :string(255)
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#  sponsor_id :bigint           not null
-#
-# Indexes
-#
-#  index_sponsor_attachments_on_sponsor_id  (sponsor_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (sponsor_id => sponsors.id)
-#
-
 class SponsorAttachmentLogoImage < SponsorAttachment
   include SponsorAttachmentFileUploader::Attachment(:file)
 
diff --git a/app/models/sponsor_contact.rb b/app/models/sponsor_contact.rb
index 720ba5b6c..56f76355f 100644
--- a/app/models/sponsor_contact.rb
+++ b/app/models/sponsor_contact.rb
@@ -1,26 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsor_contacts
-#
-#  id            :bigint           not null, primary key
-#  email         :string(255)
-#  name          :string(255)
-#  sub           :string(255)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#  sponsor_id    :bigint           not null
-#
-# Indexes
-#
-#  index_sponsor_contacts_on_conference_id  (conference_id)
-#  index_sponsor_contacts_on_sponsor_id     (sponsor_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 class SponsorContact < ApplicationRecord
   include ActionView::Helpers::UrlHelper
 
diff --git a/app/models/sponsor_contact_invite.rb b/app/models/sponsor_contact_invite.rb
index 33b077c58..1f48f7642 100644
--- a/app/models/sponsor_contact_invite.rb
+++ b/app/models/sponsor_contact_invite.rb
@@ -1,25 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsor_contact_invites
-#
-#  id            :bigint           not null, primary key
-#  email         :string(255)      not null
-#  expires_at    :datetime         not null
-#  token         :string(255)      not null
-#  conference_id :bigint           not null
-#  sponsor_id    :bigint           not null
-#
-# Indexes
-#
-#  index_sponsor_contact_invites_on_conference_id  (conference_id)
-#  index_sponsor_contact_invites_on_sponsor_id     (sponsor_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (sponsor_id => sponsors.id)
-#
-
 class SponsorContactInvite < ApplicationRecord
   belongs_to :conference
   belongs_to :sponsor
diff --git a/app/models/sponsor_contact_invite_accept.rb b/app/models/sponsor_contact_invite_accept.rb
index aee31a147..e667d6e25 100644
--- a/app/models/sponsor_contact_invite_accept.rb
+++ b/app/models/sponsor_contact_invite_accept.rb
@@ -1,30 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsor_contact_invite_accepts
-#
-#  id                        :bigint           not null, primary key
-#  created_at                :datetime         not null
-#  updated_at                :datetime         not null
-#  conference_id             :bigint           not null
-#  sponsor_contact_id        :bigint           not null
-#  sponsor_contact_invite_id :bigint           not null
-#  sponsor_id                :bigint           not null
-#
-# Indexes
-#
-#  index_sponsor_contact_invite_accepts_on_conference_id       (conference_id)
-#  index_sponsor_contact_invite_accepts_on_invitation_id       (sponsor_contact_invite_id)
-#  index_sponsor_contact_invite_accepts_on_sponsor_contact_id  (sponsor_contact_id)
-#  index_sponsor_contact_invite_accepts_on_sponsor_id          (sponsor_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (sponsor_contact_id => sponsor_contacts.id)
-#  fk_rails_...  (sponsor_contact_invite_id => sponsor_contact_invites.id)
-#  fk_rails_...  (sponsor_id => sponsors.id)
-#
-
 class SponsorContactInviteAccept < ApplicationRecord
   belongs_to :conference
   belongs_to :sponsor
diff --git a/app/models/sponsor_session.rb b/app/models/sponsor_session.rb
index 5ca6659b3..e2d117880 100644
--- a/app/models/sponsor_session.rb
+++ b/app/models/sponsor_session.rb
@@ -1,45 +1,3 @@
-# == Schema Information
-#
-# Table name: talks
-#
-#  id                    :bigint           not null, primary key
-#  abstract              :text(65535)
-#  acquired_seats        :integer          default(0), not null
-#  document_url          :string(255)
-#  end_offset            :integer          default(0), not null
-#  end_time              :time
-#  execution_phases      :json
-#  expected_participants :json
-#  movie_url             :string(255)
-#  number_of_seats       :integer          default(0), not null
-#  show_on_timetable     :boolean
-#  start_offset          :integer          default(0), not null
-#  start_time            :time
-#  title                 :string(255)
-#  type                  :string(255)      not null
-#  video_published       :boolean          default(FALSE), not null
-#  created_at            :datetime         not null
-#  updated_at            :datetime         not null
-#  conference_day_id     :integer
-#  conference_id         :integer
-#  sponsor_id            :integer
-#  talk_category_id      :bigint
-#  talk_difficulty_id    :bigint
-#  talk_time_id          :integer
-#  track_id              :integer
-#
-# Indexes
-#
-#  fk_rails_9c6f538eea                (type)
-#  index_talks_on_conference_id       (conference_id)
-#  index_talks_on_talk_category_id    (talk_category_id)
-#  index_talks_on_talk_difficulty_id  (talk_difficulty_id)
-#  index_talks_on_track_id            (track_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (type => talk_types.id)
-#
 class SponsorSession < Talk
   belongs_to :sponsor
 end
diff --git a/app/models/sponsor_speaker_invite.rb b/app/models/sponsor_speaker_invite.rb
index d4824bc1c..4e3ad76ca 100644
--- a/app/models/sponsor_speaker_invite.rb
+++ b/app/models/sponsor_speaker_invite.rb
@@ -1,27 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsor_speaker_invites
-#
-#  id            :bigint           not null, primary key
-#  email         :string(255)      not null
-#  expires_at    :datetime         not null
-#  token         :string(255)      not null
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#  sponsor_id    :bigint           not null
-#
-# Indexes
-#
-#  index_sponsor_speaker_invites_on_conference_id  (conference_id)
-#  index_sponsor_speaker_invites_on_sponsor_id     (sponsor_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (sponsor_id => sponsors.id)
-#
-
 class SponsorSpeakerInvite < ApplicationRecord
   belongs_to :conference
   belongs_to :sponsor
diff --git a/app/models/sponsor_speaker_invite_accept.rb b/app/models/sponsor_speaker_invite_accept.rb
index 58e79f380..6fb8afc11 100644
--- a/app/models/sponsor_speaker_invite_accept.rb
+++ b/app/models/sponsor_speaker_invite_accept.rb
@@ -1,34 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsor_speaker_invite_accepts
-#
-#  id                        :bigint           not null, primary key
-#  created_at                :datetime         not null
-#  updated_at                :datetime         not null
-#  conference_id             :bigint           not null
-#  speaker_id                :bigint           not null
-#  sponsor_contact_id        :bigint           not null
-#  sponsor_id                :bigint           not null
-#  sponsor_speaker_invite_id :bigint           not null
-#
-# Indexes
-#
-#  idx_spk_inv_accepts_on_conf_spsr_speaker_contact            (conference_id,sponsor_id,speaker_id,sponsor_contact_id) UNIQUE
-#  idx_spk_inv_accepts_on_invite                               (sponsor_speaker_invite_id)
-#  index_sponsor_speaker_invite_accepts_on_conference_id       (conference_id)
-#  index_sponsor_speaker_invite_accepts_on_speaker_id          (speaker_id)
-#  index_sponsor_speaker_invite_accepts_on_sponsor_contact_id  (sponsor_contact_id)
-#  index_sponsor_speaker_invite_accepts_on_sponsor_id          (sponsor_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (speaker_id => speakers.id)
-#  fk_rails_...  (sponsor_contact_id => sponsor_contacts.id)
-#  fk_rails_...  (sponsor_id => sponsors.id)
-#  fk_rails_...  (sponsor_speaker_invite_id => sponsor_speaker_invites.id)
-#
-
 class SponsorSpeakerInviteAccept < ApplicationRecord
   belongs_to :conference
   belongs_to :sponsor
diff --git a/app/models/sponsor_type.rb b/app/models/sponsor_type.rb
index 18a5d7ca9..4f4273fae 100644
--- a/app/models/sponsor_type.rb
+++ b/app/models/sponsor_type.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsor_types
-#
-#  id            :bigint           not null, primary key
-#  name          :string(255)
-#  order         :integer
-#  visible       :boolean          default(TRUE)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_sponsor_types_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 class SponsorType < ApplicationRecord
   belongs_to :conference
 
diff --git a/app/models/sponsors_sponsor_type.rb b/app/models/sponsors_sponsor_type.rb
index c4c440c9b..f36e8cfa9 100644
--- a/app/models/sponsors_sponsor_type.rb
+++ b/app/models/sponsors_sponsor_type.rb
@@ -1,14 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsors_sponsor_types
-#
-#  id              :bigint           not null, primary key
-#  created_at      :datetime         not null
-#  updated_at      :datetime         not null
-#  sponsor_id      :integer
-#  sponsor_type_id :integer
-#
-
 class SponsorsSponsorType < ApplicationRecord
   belongs_to :sponsor, optional: true
   belongs_to :sponsor_type, optional: true
diff --git a/app/models/stamp_rally_check_in.rb b/app/models/stamp_rally_check_in.rb
index 3d2dac9c8..919b860d6 100644
--- a/app/models/stamp_rally_check_in.rb
+++ b/app/models/stamp_rally_check_in.rb
@@ -1,22 +1,3 @@
-# == Schema Information
-#
-# Table name: stamp_rally_check_ins
-#
-#  id                         :string(26)       not null, primary key
-#  check_in_timestamp         :datetime         not null
-#  profile_id                 :bigint           not null
-#  stamp_rally_check_point_id :string(26)       not null
-#
-# Indexes
-#
-#  index_stamp_rally_check_ins_on_profile_id                  (profile_id)
-#  index_stamp_rally_check_ins_on_stamp_rally_check_point_id  (stamp_rally_check_point_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (profile_id => profiles.id)
-#  fk_rails_...  (stamp_rally_check_point_id => stamp_rally_check_points.id)
-#
 class StampRallyCheckIn < ApplicationRecord
   include UlidPk
 
diff --git a/app/models/stamp_rally_check_point.rb b/app/models/stamp_rally_check_point.rb
index 850d9db4f..4e759b80e 100644
--- a/app/models/stamp_rally_check_point.rb
+++ b/app/models/stamp_rally_check_point.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: stamp_rally_check_points
-#
-#  id            :string(26)       not null, primary key
-#  description   :string(255)      not null
-#  name          :string(255)      not null
-#  position      :integer
-#  type          :string(255)      not null
-#  conference_id :bigint           not null
-#  sponsor_id    :bigint
-#
-# Indexes
-#
-#  index_stamp_rally_check_points_on_conference_id  (conference_id)
-#  index_stamp_rally_check_points_on_sponsor_id     (sponsor_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
 class StampRallyCheckPoint < ApplicationRecord
   include UlidPk
   acts_as_list scope: :conference, top_of_list: 0
diff --git a/app/models/stamp_rally_check_point_booth.rb b/app/models/stamp_rally_check_point_booth.rb
index 5b23a09d1..c3c572e9c 100644
--- a/app/models/stamp_rally_check_point_booth.rb
+++ b/app/models/stamp_rally_check_point_booth.rb
@@ -1,23 +1,2 @@
-# == Schema Information
-#
-# Table name: stamp_rally_check_points
-#
-#  id            :string(26)       not null, primary key
-#  description   :string(255)      not null
-#  name          :string(255)      not null
-#  position      :integer
-#  type          :string(255)      not null
-#  conference_id :bigint           not null
-#  sponsor_id    :bigint
-#
-# Indexes
-#
-#  index_stamp_rally_check_points_on_conference_id  (conference_id)
-#  index_stamp_rally_check_points_on_sponsor_id     (sponsor_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
 class StampRallyCheckPointBooth < StampRallyCheckPoint
 end
diff --git a/app/models/stamp_rally_check_point_finish.rb b/app/models/stamp_rally_check_point_finish.rb
index 3551cd0ef..94327e5a7 100644
--- a/app/models/stamp_rally_check_point_finish.rb
+++ b/app/models/stamp_rally_check_point_finish.rb
@@ -1,23 +1,2 @@
-# == Schema Information
-#
-# Table name: stamp_rally_check_points
-#
-#  id            :string(26)       not null, primary key
-#  description   :string(255)      not null
-#  name          :string(255)      not null
-#  position      :integer
-#  type          :string(255)      not null
-#  conference_id :bigint           not null
-#  sponsor_id    :bigint
-#
-# Indexes
-#
-#  index_stamp_rally_check_points_on_conference_id  (conference_id)
-#  index_stamp_rally_check_points_on_sponsor_id     (sponsor_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
 class StampRallyCheckPointFinish < StampRallyCheckPoint
 end
diff --git a/app/models/stamp_rally_configure.rb b/app/models/stamp_rally_configure.rb
index 544bebc69..e1d063600 100644
--- a/app/models/stamp_rally_configure.rb
+++ b/app/models/stamp_rally_configure.rb
@@ -1,19 +1,3 @@
-# == Schema Information
-#
-# Table name: stamp_rally_configures
-#
-#  id               :string(26)       not null, primary key
-#  finish_threshold :decimal(10, )    not null
-#  conference_id    :bigint           not null
-#
-# Indexes
-#
-#  index_stamp_rally_configures_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
 class StampRallyConfigure < ApplicationRecord
   include UlidPk
   belongs_to :conference
diff --git a/app/models/stats_of_registrant.rb b/app/models/stats_of_registrant.rb
index 2c10edd09..0e8da4198 100644
--- a/app/models/stats_of_registrant.rb
+++ b/app/models/stats_of_registrant.rb
@@ -1,20 +1,3 @@
-# == Schema Information
-#
-# Table name: stats_of_registrants
-#
-#  id                    :bigint           not null, primary key
-#  number_of_registrants :integer
-#  offline_attendees     :decimal(10, )
-#  online_attendees      :decimal(10, )
-#  created_at            :datetime         not null
-#  updated_at            :datetime         not null
-#  conference_id         :bigint
-#
-# Indexes
-#
-#  index_stats_of_registrants_on_conference_id  (conference_id)
-#
-
 class StatsOfRegistrant < ApplicationRecord
   belongs_to :conference
 end
diff --git a/app/models/streaming.rb b/app/models/streaming.rb
index 3a090d1db..f7ed97c21 100644
--- a/app/models/streaming.rb
+++ b/app/models/streaming.rb
@@ -1,27 +1,3 @@
-# == Schema Information
-#
-# Table name: streamings
-#
-#  id            :string(255)      not null, primary key
-#  error_cause   :text(65535)
-#  status        :string(255)      not null
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#  track_id      :bigint           not null
-#
-# Indexes
-#
-#  index_streamings_on_conference_id               (conference_id)
-#  index_streamings_on_conference_id_and_track_id  (conference_id,track_id) UNIQUE
-#  index_streamings_on_track_id                    (track_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (track_id => tracks.id)
-#
-
 class Streaming < ApplicationRecord
   before_create :set_uuid
 
diff --git a/app/models/talk.rb b/app/models/talk.rb
index 614e82ea2..cb25374b9 100644
--- a/app/models/talk.rb
+++ b/app/models/talk.rb
@@ -1,46 +1,3 @@
-# == Schema Information
-#
-# Table name: talks
-#
-#  id                    :bigint           not null, primary key
-#  abstract              :text(65535)
-#  acquired_seats        :integer          default(0), not null
-#  document_url          :string(255)
-#  end_offset            :integer          default(0), not null
-#  end_time              :time
-#  execution_phases      :json
-#  expected_participants :json
-#  movie_url             :string(255)
-#  number_of_seats       :integer          default(0), not null
-#  show_on_timetable     :boolean
-#  start_offset          :integer          default(0), not null
-#  start_time            :time
-#  title                 :string(255)
-#  type                  :string(255)      not null
-#  video_published       :boolean          default(FALSE), not null
-#  created_at            :datetime         not null
-#  updated_at            :datetime         not null
-#  conference_day_id     :integer
-#  conference_id         :integer
-#  sponsor_id            :integer
-#  talk_category_id      :bigint
-#  talk_difficulty_id    :bigint
-#  talk_time_id          :integer
-#  track_id              :integer
-#
-# Indexes
-#
-#  fk_rails_9c6f538eea                (type)
-#  index_talks_on_conference_id       (conference_id)
-#  index_talks_on_talk_category_id    (talk_category_id)
-#  index_talks_on_talk_difficulty_id  (talk_difficulty_id)
-#  index_talks_on_track_id            (track_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (type => talk_types.id)
-#
-
 require 'csv'
 
 class Talk < ApplicationRecord
diff --git a/app/models/talk/type.rb b/app/models/talk/type.rb
index 785e540f6..195a06281 100644
--- a/app/models/talk/type.rb
+++ b/app/models/talk/type.rb
@@ -1,11 +1,3 @@
-# == Schema Information
-#
-# Table name: talk_types
-#
-#  id         :string(255)      not null, primary key
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#
 class Talk < ApplicationRecord
   class Type < ApplicationRecord
     KLASSES = [Session, KeynoteSession, SponsorSession, Intermission].freeze
diff --git a/app/models/talk_category.rb b/app/models/talk_category.rb
index 9b365461b..2840eaa34 100644
--- a/app/models/talk_category.rb
+++ b/app/models/talk_category.rb
@@ -1,18 +1,3 @@
-# == Schema Information
-#
-# Table name: talk_categories
-#
-#  id            :bigint           not null, primary key
-#  name          :string(255)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :integer
-#
-# Indexes
-#
-#  index_talk_categories_on_conference_id  (conference_id)
-#
-
 class TalkCategory < ApplicationRecord
   has_one :talk
   belongs_to :conference
diff --git a/app/models/talk_difficulty.rb b/app/models/talk_difficulty.rb
index 413a6f43a..4aca348d6 100644
--- a/app/models/talk_difficulty.rb
+++ b/app/models/talk_difficulty.rb
@@ -1,18 +1,3 @@
-# == Schema Information
-#
-# Table name: talk_difficulties
-#
-#  id            :bigint           not null, primary key
-#  name          :string(255)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :integer
-#
-# Indexes
-#
-#  index_talk_difficulties_on_conference_id  (conference_id)
-#
-
 class TalkDifficulty < ApplicationRecord
   has_one :talk
   belongs_to :conference
diff --git a/app/models/talk_time.rb b/app/models/talk_time.rb
index 9869b14ff..cdf6d1106 100644
--- a/app/models/talk_time.rb
+++ b/app/models/talk_time.rb
@@ -1,22 +1,3 @@
-# == Schema Information
-#
-# Table name: talk_times
-#
-#  id            :bigint           not null, primary key
-#  time_minutes  :integer
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_talk_times_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 class TalkTime < ApplicationRecord
   has_many :talks
   belongs_to :conference
diff --git a/app/models/talks_speaker.rb b/app/models/talks_speaker.rb
index 4e8313cd8..b9ec5247c 100644
--- a/app/models/talks_speaker.rb
+++ b/app/models/talks_speaker.rb
@@ -1,18 +1,3 @@
-# == Schema Information
-#
-# Table name: talks_speakers
-#
-#  id         :bigint           not null, primary key
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#  speaker_id :integer
-#  talk_id    :integer
-#
-# Indexes
-#
-#  index_talks_speakers_on_speaker_id  (speaker_id)
-#
-
 class TalksSpeaker < ApplicationRecord
   belongs_to :talk, optional: true
   belongs_to :speaker, optional: true
diff --git a/app/models/track.rb b/app/models/track.rb
index 300bf3959..ef8d588c8 100644
--- a/app/models/track.rb
+++ b/app/models/track.rb
@@ -1,22 +1,3 @@
-# == Schema Information
-#
-# Table name: tracks
-#
-#  id             :bigint           not null, primary key
-#  name           :string(255)
-#  number         :integer
-#  video_platform :string(255)
-#  created_at     :datetime         not null
-#  updated_at     :datetime         not null
-#  conference_id  :integer
-#  room_id        :bigint           default(0)
-#  video_id       :string(255)
-#
-# Indexes
-#
-#  index_tracks_on_conference_id  (conference_id)
-#
-
 class Track < ApplicationRecord
   has_many :talks
   has_one :streaming
diff --git a/app/models/video.rb b/app/models/video.rb
index e86048c36..c881c9770 100644
--- a/app/models/video.rb
+++ b/app/models/video.rb
@@ -1,18 +1,3 @@
-# == Schema Information
-#
-# Table name: videos
-#
-#  id              :bigint           not null, primary key
-#  on_air          :boolean
-#  site            :string(255)
-#  url             :string(255)
-#  video_file_data :text(65535)
-#  created_at      :datetime         not null
-#  updated_at      :datetime         not null
-#  talk_id         :integer
-#  video_id        :string(255)
-#
-
 class Video < ApplicationRecord
   include VideoFileUploader::Attachment(:video_file)
 
diff --git a/app/models/video_registration.rb b/app/models/video_registration.rb
index 5ca4491e7..cb4486264 100644
--- a/app/models/video_registration.rb
+++ b/app/models/video_registration.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: video_registrations
-#
-#  id         :bigint           not null, primary key
-#  statistics :json             not null
-#  status     :integer          default("unsubmitted"), not null
-#  url        :string(255)
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#  talk_id    :bigint           not null
-#
-# Indexes
-#
-#  index_video_registrations_on_talk_id  (talk_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (talk_id => talks.id)
-#
-
 class VideoRegistration < ApplicationRecord
   belongs_to :talk
   enum :status, { unsubmitted: 0, submitted: 1, confirmed: 2, invalid_format: 3 }
diff --git a/app/models/viewer_count.rb b/app/models/viewer_count.rb
index a85347873..d5e7231b9 100644
--- a/app/models/viewer_count.rb
+++ b/app/models/viewer_count.rb
@@ -1,23 +1,3 @@
-# == Schema Information
-#
-# Table name: viewer_counts
-#
-#  id            :bigint           not null, primary key
-#  count         :integer
-#  stream_type   :string(255)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :integer
-#  talk_id       :integer
-#  track_id      :integer
-#
-# Indexes
-#
-#  index_viewer_counts_on_conference_id  (conference_id)
-#  index_viewer_counts_on_talk_id        (talk_id)
-#  index_viewer_counts_on_track_id       (track_id)
-#
-
 class ViewerCount < ApplicationRecord
   def self.latest_number_of_viewers
     on_air_ids = Talk.where(conference_id: Conference.opened.ids).on_air.pluck(:id)
diff --git a/lib/tasks/auto_annotate_models.rake b/lib/tasks/auto_annotate_models.rake
deleted file mode 100644
index cc3cef82a..000000000
--- a/lib/tasks/auto_annotate_models.rake
+++ /dev/null
@@ -1,59 +0,0 @@
-# NOTE: only doing this in development as some production environments (Heroku)
-# NOTE: are sensitive to local FS writes, and besides -- it's just not proper
-# NOTE: to have a dev-mode tool do its thing in production.
-if Rails.env.development? || Rails.env.test?
-  require 'annotate'
-  task :set_annotation_options do
-    # You can override any of these by setting an environment variable of the
-    # same name.
-    Annotate.set_defaults(
-      'active_admin'                => 'false',
-      'additional_file_patterns'    => [],
-      'routes'                      => 'false',
-      'models'                      => 'true',
-      'position_in_routes'          => 'before',
-      'position_in_class'           => 'before',
-      'position_in_test'            => 'before',
-      'position_in_fixture'         => 'before',
-      'position_in_factory'         => 'before',
-      'position_in_serializer'      => 'before',
-      'show_foreign_keys'           => 'true',
-      'show_complete_foreign_keys'  => 'false',
-      'show_indexes'                => 'true',
-      'simple_indexes'              => 'false',
-      'model_dir'                   => 'app/models',
-      'root_dir'                    => '',
-      'include_version'             => 'false',
-      'require'                     => '',
-      'exclude_tests'               => 'false',
-      'exclude_fixtures'            => 'false',
-      'exclude_factories'           => 'false',
-      'exclude_serializers'         => 'false',
-      'exclude_scaffolds'           => 'true',
-      'exclude_controllers'         => 'true',
-      'exclude_helpers'             => 'true',
-      'exclude_sti_subclasses'      => 'false',
-      'ignore_model_sub_dir'        => 'false',
-      'ignore_columns'              => nil,
-      'ignore_routes'               => nil,
-      'ignore_unknown_models'       => 'false',
-      'hide_limit_column_types'     => 'integer,bigint,boolean',
-      'hide_default_column_types'   => 'json,jsonb,hstore',
-      'skip_on_db_migrate'          => 'false',
-      'format_bare'                 => 'true',
-      'format_rdoc'                 => 'false',
-      'format_yard'                 => 'false',
-      'format_markdown'             => 'false',
-      'sort'                        => 'false',
-      'force'                       => 'false',
-      'frozen'                      => 'false',
-      'classified_sort'             => 'true',
-      'trace'                       => 'false',
-      'wrapper_open'                => nil,
-      'wrapper_close'               => nil,
-      'with_comment'                => 'true'
-    )
-  end
-
-  Annotate.load_tasks
-end
diff --git a/spec/factories/admin_profiles.rb b/spec/factories/admin_profiles.rb
index bb8e08061..89eca6d6b 100644
--- a/spec/factories/admin_profiles.rb
+++ b/spec/factories/admin_profiles.rb
@@ -1,27 +1,3 @@
-# == Schema Information
-#
-# Table name: admin_profiles
-#
-#  id                :bigint           not null, primary key
-#  avatar_data       :text(65535)
-#  email             :string(255)
-#  name              :string(255)
-#  show_on_team_page :boolean
-#  sub               :string(255)
-#  created_at        :datetime         not null
-#  updated_at        :datetime         not null
-#  conference_id     :bigint           not null
-#  github_id         :string(255)
-#  twitter_id        :string(255)
-#
-# Indexes
-#
-#  index_admin_profiles_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
 FactoryBot.define do
   factory :admin_profile
 end
diff --git a/spec/factories/announcements.rb b/spec/factories/announcements.rb
index 5bd353707..30e64a904 100644
--- a/spec/factories/announcements.rb
+++ b/spec/factories/announcements.rb
@@ -1,21 +1,3 @@
-# == Schema Information
-#
-# Table name: announcements
-#
-#  id            :bigint           not null, primary key
-#  body          :text(65535)
-#  publish       :boolean
-#  publish_time  :datetime
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_announcements_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
 FactoryBot.define do
   factory :announcement
 end
diff --git a/spec/factories/chat_messages.rb b/spec/factories/chat_messages.rb
index 18f3c5553..49b045f04 100644
--- a/spec/factories/chat_messages.rb
+++ b/spec/factories/chat_messages.rb
@@ -1,38 +1,3 @@
-# == Schema Information
-#
-# Table name: chat_messages
-#
-#  id             :bigint           not null, primary key
-#  body           :text(65535)
-#  children_count :integer          default(0), not null
-#  depth          :integer          default(0), not null
-#  lft            :integer          not null
-#  message_type   :integer
-#  rgt            :integer          not null
-#  room_type      :string(255)
-#  created_at     :datetime         not null
-#  updated_at     :datetime         not null
-#  conference_id  :bigint           not null
-#  parent_id      :integer
-#  profile_id     :bigint
-#  room_id        :bigint
-#  speaker_id     :bigint
-#
-# Indexes
-#
-#  index_chat_messages_on_conference_id  (conference_id)
-#  index_chat_messages_on_lft            (lft)
-#  index_chat_messages_on_parent_id      (parent_id)
-#  index_chat_messages_on_profile_id     (profile_id)
-#  index_chat_messages_on_rgt            (rgt)
-#  index_chat_messages_on_speaker_id     (speaker_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (profile_id => profiles.id)
-#  fk_rails_...  (speaker_id => speakers.id)
-#
 FactoryBot.define do
   factory :chat_message
 
diff --git a/spec/factories/check_ins.rb b/spec/factories/check_ins.rb
index 5f5825910..a031c514a 100644
--- a/spec/factories/check_ins.rb
+++ b/spec/factories/check_ins.rb
@@ -1,16 +1,3 @@
-# == Schema Information
-#
-# Table name: check_ins
-#
-#  id         :bigint           not null, primary key
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#  profile_id :integer
-#
-# Indexes
-#
-#  index_check_ins_on_profile_id  (profile_id)
-#
 FactoryBot.define do
   factory :check_in, class: CheckIn do
   end
diff --git a/spec/factories/conference_days.rb b/spec/factories/conference_days.rb
index a4a19049e..ab7748c87 100644
--- a/spec/factories/conference_days.rb
+++ b/spec/factories/conference_days.rb
@@ -1,21 +1,3 @@
-# == Schema Information
-#
-# Table name: conference_days
-#
-#  id            :bigint           not null, primary key
-#  date          :date
-#  end_time      :time
-#  internal      :boolean          default(FALSE), not null
-#  start_time    :time
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint
-#
-# Indexes
-#
-#  index_conference_days_on_conference_id  (conference_id)
-#
-
 FactoryBot.define do
   factory :conference_day
 
diff --git a/spec/factories/conferences.rb b/spec/factories/conferences.rb
index 696c2e4a5..7179274a5 100644
--- a/spec/factories/conferences.rb
+++ b/spec/factories/conferences.rb
@@ -1,37 +1,3 @@
-# == Schema Information
-#
-# Table name: conferences
-#
-#  id                         :bigint           not null, primary key
-#  abbr                       :string(255)
-#  about                      :text(65535)
-#  attendee_entry             :integer          default("attendee_entry_disabled")
-#  brief                      :string(255)
-#  capacity                   :integer
-#  cfp_result_visible         :boolean          default(FALSE)
-#  coc                        :text(65535)
-#  committee_name             :string(255)      default("CloudNative Days Committee"), not null
-#  conference_status          :string(255)      default("registered")
-#  contact_url                :text(65535)
-#  copyright                  :string(255)
-#  name                       :string(255)
-#  privacy_policy             :text(65535)
-#  privacy_policy_for_speaker :text(65535)
-#  rehearsal_mode             :boolean          default(FALSE), not null
-#  show_sponsors              :boolean          default(FALSE)
-#  show_timetable             :integer          default("show_timetable_disabled")
-#  speaker_entry              :integer          default("speaker_entry_disabled")
-#  sponsor_guideline_url      :text(65535)
-#  theme                      :text(65535)
-#  created_at                 :datetime         not null
-#  updated_at                 :datetime         not null
-#
-# Indexes
-#
-#  index_conferences_on_abbr                        (abbr)
-#  index_conferences_on_abbr_and_conference_status  (abbr,conference_status)
-#
-
 FactoryBot.define do
   factory :conference
 
diff --git a/spec/factories/form_items.rb b/spec/factories/form_items.rb
index 4e064a782..6b53849e7 100644
--- a/spec/factories/form_items.rb
+++ b/spec/factories/form_items.rb
@@ -1,15 +1,3 @@
-# == Schema Information
-#
-# Table name: form_items
-#
-#  id            :bigint           not null, primary key
-#  attr          :string(255)
-#  name          :string(255)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :integer
-#
-
 FactoryBot.define do
   factory :form_item do
     association :conference
diff --git a/spec/factories/form_values.rb b/spec/factories/form_values.rb
index 039d00ffd..c1a964a92 100644
--- a/spec/factories/form_values.rb
+++ b/spec/factories/form_values.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: form_values
-#
-#  id           :bigint           not null, primary key
-#  value        :string(255)
-#  created_at   :datetime         not null
-#  updated_at   :datetime         not null
-#  form_item_id :bigint           not null
-#  profile_id   :bigint           not null
-#
-# Indexes
-#
-#  index_form_values_on_form_item_id  (form_item_id)
-#  index_form_values_on_profile_id    (profile_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (form_item_id => form_items.id)
-#  fk_rails_...  (profile_id => profiles.id)
-#
 FactoryBot.define do
   factory :form_value do
     association :profile
diff --git a/spec/factories/links.rb b/spec/factories/links.rb
index e0d8374f3..95a359792 100644
--- a/spec/factories/links.rb
+++ b/spec/factories/links.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: links
-#
-#  id            :bigint           not null, primary key
-#  description   :text(65535)
-#  title         :string(255)
-#  url           :string(255)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_links_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 FactoryBot.define do
   factory :link do
     conference { nil }
diff --git a/spec/factories/media_live_channels.rb b/spec/factories/media_live_channels.rb
index a3acbaae3..15b821e0e 100644
--- a/spec/factories/media_live_channels.rb
+++ b/spec/factories/media_live_channels.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: media_live_channels
-#
-#  id                  :string(255)      not null, primary key
-#  created_at          :datetime         not null
-#  updated_at          :datetime         not null
-#  channel_id          :string(255)
-#  media_live_input_id :string(255)      not null
-#  streaming_id        :string(255)      not null
-#
-# Indexes
-#
-#  index_media_live_channels_on_media_live_input_id  (media_live_input_id)
-#  index_media_live_channels_on_streaming_id         (streaming_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (media_live_input_id => media_live_inputs.id)
-#  fk_rails_...  (streaming_id => streamings.id)
-#
 FactoryBot.define do
   factory :media_live_channel
 end
diff --git a/spec/factories/media_live_input_security_groups.rb b/spec/factories/media_live_input_security_groups.rb
index e434793c2..722bc3eff 100644
--- a/spec/factories/media_live_input_security_groups.rb
+++ b/spec/factories/media_live_input_security_groups.rb
@@ -1,21 +1,3 @@
-# == Schema Information
-#
-# Table name: media_live_input_security_groups
-#
-#  id                      :string(255)      not null, primary key
-#  created_at              :datetime         not null
-#  updated_at              :datetime         not null
-#  input_security_group_id :string(255)
-#  streaming_id            :string(255)      not null
-#
-# Indexes
-#
-#  index_media_live_input_security_groups_on_streaming_id  (streaming_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (streaming_id => streamings.id)
-#
 FactoryBot.define do
   factory :media_live_input_security_group
 end
diff --git a/spec/factories/media_live_inputs.rb b/spec/factories/media_live_inputs.rb
index 1ed9c36ad..6b4214dbb 100644
--- a/spec/factories/media_live_inputs.rb
+++ b/spec/factories/media_live_inputs.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: media_live_inputs
-#
-#  id                                 :string(255)      not null, primary key
-#  created_at                         :datetime         not null
-#  updated_at                         :datetime         not null
-#  input_id                           :string(255)
-#  media_live_input_security_group_id :string(255)      not null
-#  streaming_id                       :string(255)      not null
-#
-# Indexes
-#
-#  index_media_live_inputs_on_media_live_input_security_group_id  (media_live_input_security_group_id)
-#  index_media_live_inputs_on_streaming_id                        (streaming_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (media_live_input_security_group_id => media_live_input_security_groups.id)
-#  fk_rails_...  (streaming_id => streamings.id)
-#
 FactoryBot.define do
   factory :media_live_input
 end
diff --git a/spec/factories/media_package_channels.rb b/spec/factories/media_package_channels.rb
index 284379133..c30e93ea4 100644
--- a/spec/factories/media_package_channels.rb
+++ b/spec/factories/media_package_channels.rb
@@ -1,20 +1,3 @@
-# == Schema Information
-#
-# Table name: media_package_channels
-#
-#  id           :bigint           not null, primary key
-#  channel_id   :string(255)      default("")
-#  streaming_id :string(255)
-#
-# Indexes
-#
-#  index_media_package_channels_on_channel_id    (channel_id)
-#  index_media_package_channels_on_streaming_id  (streaming_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (streaming_id => streamings.id)
-#
 FactoryBot.define do
   factory :media_package_channel
 end
diff --git a/spec/factories/media_package_harvest_jobs.rb b/spec/factories/media_package_harvest_jobs.rb
index 71fa5cf7b..13098ee63 100644
--- a/spec/factories/media_package_harvest_jobs.rb
+++ b/spec/factories/media_package_harvest_jobs.rb
@@ -1,28 +1,3 @@
-# == Schema Information
-#
-# Table name: media_package_harvest_jobs
-#
-#  id                       :bigint           not null, primary key
-#  end_time                 :datetime
-#  start_time               :datetime
-#  status                   :string(255)
-#  conference_id            :bigint           not null
-#  job_id                   :string(255)
-#  media_package_channel_id :bigint           not null
-#  talk_id                  :bigint           not null
-#
-# Indexes
-#
-#  index_media_package_harvest_jobs_on_conference_id             (conference_id)
-#  index_media_package_harvest_jobs_on_media_package_channel_id  (media_package_channel_id)
-#  index_media_package_harvest_jobs_on_talk_id                   (talk_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (media_package_channel_id => media_package_channels.id)
-#  fk_rails_...  (talk_id => talks.id)
-#
 FactoryBot.define do
   factory :media_package_harvest_job
 end
diff --git a/spec/factories/media_package_origin_endpoints.rb b/spec/factories/media_package_origin_endpoints.rb
index f5c545399..f3d47abdb 100644
--- a/spec/factories/media_package_origin_endpoints.rb
+++ b/spec/factories/media_package_origin_endpoints.rb
@@ -1,22 +1,3 @@
-# == Schema Information
-#
-# Table name: media_package_origin_endpoints
-#
-#  id                       :bigint           not null, primary key
-#  endpoint_id              :string(255)
-#  media_package_channel_id :bigint           not null
-#  streaming_id             :string(255)
-#
-# Indexes
-#
-#  index_media_package_origin_endpoints_on_media_package_channel_id  (media_package_channel_id)
-#  index_media_package_origin_endpoints_on_streaming_id              (streaming_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (media_package_channel_id => media_package_channels.id)
-#  fk_rails_...  (streaming_id => streamings.id)
-#
 FactoryBot.define do
   factory :media_package_origin_endpoint
 end
diff --git a/spec/factories/media_package_parameters.rb b/spec/factories/media_package_parameters.rb
index 32b10c320..e185a5550 100644
--- a/spec/factories/media_package_parameters.rb
+++ b/spec/factories/media_package_parameters.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: media_package_parameters
-#
-#  id                       :string(255)      not null, primary key
-#  name                     :string(255)
-#  created_at               :datetime         not null
-#  updated_at               :datetime         not null
-#  media_package_channel_id :bigint           not null
-#  streaming_id             :string(255)      not null
-#
-# Indexes
-#
-#  index_media_package_parameters_on_media_package_channel_id  (media_package_channel_id)
-#  index_media_package_parameters_on_streaming_id              (streaming_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (media_package_channel_id => media_package_channels.id)
-#  fk_rails_...  (streaming_id => streamings.id)
-#
 FactoryBot.define do
   factory :media_package_parameter
 end
diff --git a/spec/factories/media_package_v2_channel_groups.rb b/spec/factories/media_package_v2_channel_groups.rb
index 6a1a13a8e..64b411c08 100644
--- a/spec/factories/media_package_v2_channel_groups.rb
+++ b/spec/factories/media_package_v2_channel_groups.rb
@@ -1,21 +1,3 @@
-# == Schema Information
-#
-# Table name: media_package_v2_channel_groups
-#
-#  id           :string(255)      not null, primary key
-#  name         :string(255)
-#  streaming_id :string(255)      not null
-#
-# Indexes
-#
-#  index_media_package_v2_channel_groups_on_name          (name) UNIQUE
-#  index_media_package_v2_channel_groups_on_streaming_id  (streaming_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (streaming_id => streamings.id)
-#
-
 FactoryBot.define do
   factory :media_package_v2_channel_group, class: MediaPackageV2ChannelGroup
 end
diff --git a/spec/factories/media_package_v2_channels.rb b/spec/factories/media_package_v2_channels.rb
index d1e7fc64f..f71339cd5 100644
--- a/spec/factories/media_package_v2_channels.rb
+++ b/spec/factories/media_package_v2_channels.rb
@@ -1,23 +1,3 @@
-# == Schema Information
-#
-# Table name: media_package_v2_channels
-#
-#  id                                :string(255)      not null, primary key
-#  name                              :string(255)
-#  media_package_v2_channel_group_id :string(255)
-#  streaming_id                      :string(255)      not null
-#
-# Indexes
-#
-#  index_channels_on_channel_group_id               (media_package_v2_channel_group_id)
-#  index_media_package_v2_channels_on_name          (name) UNIQUE
-#  index_media_package_v2_channels_on_streaming_id  (streaming_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (streaming_id => streamings.id)
-#
-
 FactoryBot.define do
   factory :media_package_v2_channel, class: MediaPackageV2Channel
 end
diff --git a/spec/factories/media_package_v2_origin_endpoints.rb b/spec/factories/media_package_v2_origin_endpoints.rb
index 4701f3260..934aa519f 100644
--- a/spec/factories/media_package_v2_origin_endpoints.rb
+++ b/spec/factories/media_package_v2_origin_endpoints.rb
@@ -1,23 +1,3 @@
-# == Schema Information
-#
-# Table name: media_package_v2_origin_endpoints
-#
-#  id                          :string(255)      not null, primary key
-#  name                        :string(255)
-#  media_package_v2_channel_id :string(255)
-#  streaming_id                :string(255)      not null
-#
-# Indexes
-#
-#  index_media_package_v2_origin_endpoints_on_name          (name) UNIQUE
-#  index_media_package_v2_origin_endpoints_on_streaming_id  (streaming_id)
-#  index_origin_endpoints_on_channel_id                     (media_package_v2_channel_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (streaming_id => streamings.id)
-#
-
 FactoryBot.define do
   factory :media_package_v2_origin_endpoint, class: MediaPackageV2OriginEndpoint
 end
diff --git a/spec/factories/profiles.rb b/spec/factories/profiles.rb
index 7118ce248..3867eea7c 100644
--- a/spec/factories/profiles.rb
+++ b/spec/factories/profiles.rb
@@ -1,41 +1,3 @@
-# == Schema Information
-#
-# Table name: profiles
-#
-#  id                            :bigint           not null, primary key
-#  calendar_unique_code          :string(255)
-#  company_address               :string(255)
-#  company_address_level1        :string(255)
-#  company_address_level2        :string(255)
-#  company_address_line1         :string(255)
-#  company_address_line2         :string(255)
-#  company_email                 :string(255)
-#  company_fax                   :string(255)
-#  company_name                  :string(255)
-#  company_postal_code           :string(255)
-#  company_tel                   :string(255)
-#  department                    :string(255)
-#  email                         :string(255)
-#  first_name                    :string(255)
-#  first_name_kana               :string(255)
-#  last_name                     :string(255)
-#  last_name_kana                :string(255)
-#  occupation                    :string(255)
-#  participation                 :string(255)
-#  position                      :string(255)
-#  sub                           :string(255)
-#  created_at                    :datetime         not null
-#  updated_at                    :datetime         not null
-#  annual_sales_id               :integer          default(11)
-#  company_address_prefecture_id :string(255)
-#  company_name_prefix_id        :string(255)
-#  company_name_suffix_id        :string(255)
-#  conference_id                 :integer
-#  industry_id                   :integer
-#  number_of_employee_id         :integer          default(12)
-#  occupation_id                 :integer          default(34)
-#
-
 FactoryBot.define do
   factory :profile
 
diff --git a/spec/factories/proposal_item_configs.rb b/spec/factories/proposal_item_configs.rb
index f8cfc8019..f02148369 100644
--- a/spec/factories/proposal_item_configs.rb
+++ b/spec/factories/proposal_item_configs.rb
@@ -1,28 +1,3 @@
-# == Schema Information
-#
-# Table name: proposal_item_configs
-#
-#  id            :bigint           not null, primary key
-#  description   :text(65535)
-#  item_name     :string(255)
-#  item_number   :integer
-#  key           :string(255)
-#  label         :string(255)
-#  params        :json
-#  type          :string(255)
-#  value         :string(255)
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_proposal_item_configs_on_conference_id                  (conference_id)
-#  index_proposal_item_configs_on_conference_id_and_item_number  (conference_id,item_number)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 FactoryBot.define do
   factory :proposal_item_config
 
diff --git a/spec/factories/proposal_items.rb b/spec/factories/proposal_items.rb
index f33399b21..2c6ee0b53 100644
--- a/spec/factories/proposal_items.rb
+++ b/spec/factories/proposal_items.rb
@@ -1,23 +1,3 @@
-# == Schema Information
-#
-# Table name: proposal_items
-#
-#  id            :bigint           not null, primary key
-#  label         :string(255)
-#  params        :json
-#  conference_id :bigint           not null
-#  talk_id       :bigint           not null
-#
-# Indexes
-#
-#  index_proposal_items_on_conference_id  (conference_id)
-#  index_proposal_items_on_talk_id        (talk_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 FactoryBot.define do
   factory :proposal_item
 
diff --git a/spec/factories/proposals.rb b/spec/factories/proposals.rb
index 71a64eb1e..2152acdf9 100644
--- a/spec/factories/proposals.rb
+++ b/spec/factories/proposals.rb
@@ -1,15 +1,3 @@
-# == Schema Information
-#
-# Table name: proposals
-#
-#  id            :bigint           not null, primary key
-#  status        :integer          default("registered"), not null
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :integer          not null
-#  talk_id       :integer          not null
-#
-
 FactoryBot.define do
   factory :proposal, class: Proposal do
     trait :with_cndt2021 do
diff --git a/spec/factories/public_profiles.rb b/spec/factories/public_profiles.rb
index 3d32d04d4..a2aa2a2b7 100644
--- a/spec/factories/public_profiles.rb
+++ b/spec/factories/public_profiles.rb
@@ -1,23 +1,3 @@
-# == Schema Information
-#
-# Table name: public_profiles
-#
-#  id          :bigint           not null, primary key
-#  avatar_data :text(65535)
-#  is_public   :boolean          default(FALSE)
-#  nickname    :string(255)      default("")
-#  github_id   :string(255)      default("")
-#  profile_id  :bigint           not null
-#  twitter_id  :string(255)      default("")
-#
-# Indexes
-#
-#  index_public_profiles_on_profile_id  (profile_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (profile_id => profiles.id)
-#
 FactoryBot.define do
   factory :public_profile
 end
diff --git a/spec/factories/registered_talks.rb b/spec/factories/registered_talks.rb
index 91721f3d7..e373371da 100644
--- a/spec/factories/registered_talks.rb
+++ b/spec/factories/registered_talks.rb
@@ -1,14 +1,3 @@
-# == Schema Information
-#
-# Table name: registered_talks
-#
-#  id         :bigint           not null, primary key
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#  profile_id :integer
-#  talk_id    :integer
-#
-
 FactoryBot.define do
   factory :registered_talk, class: RegisteredTalk
 end
diff --git a/spec/factories/rooms.rb b/spec/factories/rooms.rb
index ded8eb812..cce0a6a59 100644
--- a/spec/factories/rooms.rb
+++ b/spec/factories/rooms.rb
@@ -1,23 +1,3 @@
-# == Schema Information
-#
-# Table name: rooms
-#
-#  id              :bigint           not null, primary key
-#  description     :text(65535)
-#  name            :string(255)      not null
-#  number_of_seats :integer          default(0), not null
-#  created_at      :datetime         not null
-#  updated_at      :datetime         not null
-#  conference_id   :bigint           not null
-#
-# Indexes
-#
-#  index_rooms_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
 FactoryBot.define do
   factory :room, class: Room do
     name { 'ONLINE' }
diff --git a/spec/factories/speaker_announcement_middles.rb b/spec/factories/speaker_announcement_middles.rb
index 2e0b0b10c..adf47481c 100644
--- a/spec/factories/speaker_announcement_middles.rb
+++ b/spec/factories/speaker_announcement_middles.rb
@@ -1,23 +1,3 @@
-# == Schema Information
-#
-# Table name: speaker_announcement_middles
-#
-#  id                      :bigint           not null, primary key
-#  created_at              :datetime         not null
-#  updated_at              :datetime         not null
-#  speaker_announcement_id :bigint           not null
-#  speaker_id              :bigint           not null
-#
-# Indexes
-#
-#  index_speaker_announcement_middles_on_speaker_announcement_id  (speaker_announcement_id)
-#  index_speaker_announcement_middles_on_speaker_id               (speaker_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (speaker_announcement_id => speaker_announcements.id)
-#  fk_rails_...  (speaker_id => speakers.id)
-#
 FactoryBot.define do
   factory :speaker_announcement_middle
 end
diff --git a/spec/factories/speaker_announcements.rb b/spec/factories/speaker_announcements.rb
index a9ccb9e9a..b52b5a8d4 100644
--- a/spec/factories/speaker_announcements.rb
+++ b/spec/factories/speaker_announcements.rb
@@ -1,25 +1,3 @@
-# == Schema Information
-#
-# Table name: speaker_announcements
-#
-#  id            :bigint           not null, primary key
-#  body          :text(65535)      not null
-#  publish       :boolean          default(FALSE)
-#  publish_time  :datetime         not null
-#  receiver      :integer          default("person"), not null
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_speaker_announcements_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 FactoryBot.define do
   factory :speaker_announcement do
     conference_id { 1 }
diff --git a/spec/factories/speaker_invitation_accepts.rb b/spec/factories/speaker_invitation_accepts.rb
index 3fa3fa7a4..e06b03279 100644
--- a/spec/factories/speaker_invitation_accepts.rb
+++ b/spec/factories/speaker_invitation_accepts.rb
@@ -1,30 +1,3 @@
-# == Schema Information
-#
-# Table name: speaker_invitation_accepts
-#
-#  id                    :bigint           not null, primary key
-#  created_at            :datetime         not null
-#  updated_at            :datetime         not null
-#  conference_id         :bigint           not null
-#  speaker_id            :bigint           not null
-#  speaker_invitation_id :bigint           not null
-#  talk_id               :bigint           not null
-#
-# Indexes
-#
-#  index_speaker_invitation_accepts_on_conference_id            (conference_id)
-#  index_speaker_invitation_accepts_on_conference_speaker_talk  (conference_id,speaker_id,talk_id) UNIQUE
-#  index_speaker_invitation_accepts_on_speaker_id               (speaker_id)
-#  index_speaker_invitation_accepts_on_speaker_invitation_id    (speaker_invitation_id)
-#  index_speaker_invitation_accepts_on_talk_id                  (talk_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (speaker_id => speakers.id)
-#  fk_rails_...  (speaker_invitation_id => speaker_invitations.id)
-#  fk_rails_...  (talk_id => talks.id)
-#
 FactoryBot.define do
   factory :speaker_invitation_accept do
     speaker_invitation { nil }
diff --git a/spec/factories/speaker_invitations.rb b/spec/factories/speaker_invitations.rb
index e382573e5..340641c6c 100644
--- a/spec/factories/speaker_invitations.rb
+++ b/spec/factories/speaker_invitations.rb
@@ -1,26 +1,3 @@
-# == Schema Information
-#
-# Table name: speaker_invitations
-#
-#  id            :bigint           not null, primary key
-#  email         :string(255)      not null
-#  expires_at    :datetime         not null
-#  token         :string(255)      not null
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#  talk_id       :bigint           not null
-#
-# Indexes
-#
-#  index_speaker_invitations_on_conference_id  (conference_id)
-#  index_speaker_invitations_on_talk_id        (talk_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (talk_id => talks.id)
-#
 FactoryBot.define do
   factory :speaker_invitation do
     email { 'MyString' }
diff --git a/spec/factories/speakers.rb b/spec/factories/speakers.rb
index 1a0dff6bc..d47aa59c0 100644
--- a/spec/factories/speakers.rb
+++ b/spec/factories/speakers.rb
@@ -1,29 +1,3 @@
-# == Schema Information
-#
-# Table name: speakers
-#
-#  id                   :bigint           not null, primary key
-#  additional_documents :text(65535)
-#  avatar_data          :text(65535)
-#  company              :string(255)
-#  email                :text(65535)
-#  job_title            :string(255)
-#  name                 :string(255)
-#  name_mother_tongue   :string(255)
-#  profile              :text(65535)
-#  sub                  :text(65535)
-#  created_at           :datetime         not null
-#  updated_at           :datetime         not null
-#  conference_id        :integer
-#  github_id            :string(255)
-#  sponsor_id           :bigint
-#  twitter_id           :string(255)
-#
-# Indexes
-#
-#  index_speakers_on_conference_id_and_email  (conference_id,email)
-#
-
 FactoryBot.define do
   factory :speaker
 
diff --git a/spec/factories/sponsor_attachments.rb b/spec/factories/sponsor_attachments.rb
index f5d1c4d37..8c7ad59f2 100644
--- a/spec/factories/sponsor_attachments.rb
+++ b/spec/factories/sponsor_attachments.rb
@@ -1,28 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsor_attachments
-#
-#  id         :bigint           not null, primary key
-#  file_data  :string(255)
-#  link       :string(255)
-#  public     :boolean
-#  text       :text(65535)
-#  title      :string(255)
-#  type       :string(255)
-#  url        :string(255)
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#  sponsor_id :bigint           not null
-#
-# Indexes
-#
-#  index_sponsor_attachments_on_sponsor_id  (sponsor_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (sponsor_id => sponsors.id)
-#
-
 FactoryBot.define do
   factory :sponsor_attachment do
     sponsor { nil }
diff --git a/spec/factories/sponsor_contact_invite_accepts.rb b/spec/factories/sponsor_contact_invite_accepts.rb
index 62cb0c109..433bf5b39 100644
--- a/spec/factories/sponsor_contact_invite_accepts.rb
+++ b/spec/factories/sponsor_contact_invite_accepts.rb
@@ -1,30 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsor_contact_invite_accepts
-#
-#  id                        :bigint           not null, primary key
-#  created_at                :datetime         not null
-#  updated_at                :datetime         not null
-#  conference_id             :bigint           not null
-#  sponsor_contact_id        :bigint           not null
-#  sponsor_contact_invite_id :bigint           not null
-#  sponsor_id                :bigint           not null
-#
-# Indexes
-#
-#  index_sponsor_contact_invite_accepts_on_conference_id       (conference_id)
-#  index_sponsor_contact_invite_accepts_on_invitation_id       (sponsor_contact_invite_id)
-#  index_sponsor_contact_invite_accepts_on_sponsor_contact_id  (sponsor_contact_id)
-#  index_sponsor_contact_invite_accepts_on_sponsor_id          (sponsor_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (sponsor_contact_id => sponsor_contacts.id)
-#  fk_rails_...  (sponsor_contact_invite_id => sponsor_contact_invites.id)
-#  fk_rails_...  (sponsor_id => sponsors.id)
-#
-
 FactoryBot.define do
   factory :sponsor_contact_invite_accept do
     conference
diff --git a/spec/factories/sponsor_contact_invites.rb b/spec/factories/sponsor_contact_invites.rb
index 43c2240f3..7b0179957 100644
--- a/spec/factories/sponsor_contact_invites.rb
+++ b/spec/factories/sponsor_contact_invites.rb
@@ -1,25 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsor_contact_invites
-#
-#  id            :bigint           not null, primary key
-#  email         :string(255)      not null
-#  expires_at    :datetime         not null
-#  token         :string(255)      not null
-#  conference_id :bigint           not null
-#  sponsor_id    :bigint           not null
-#
-# Indexes
-#
-#  index_sponsor_contact_invites_on_conference_id  (conference_id)
-#  index_sponsor_contact_invites_on_sponsor_id     (sponsor_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (sponsor_id => sponsors.id)
-#
-
 FactoryBot.define do
   factory :sponsor_contact_invite do
     email { 'contact@example.com' }
diff --git a/spec/factories/sponsor_contacts.rb b/spec/factories/sponsor_contacts.rb
index 05a190011..5b83c51da 100644
--- a/spec/factories/sponsor_contacts.rb
+++ b/spec/factories/sponsor_contacts.rb
@@ -1,26 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsor_contacts
-#
-#  id            :bigint           not null, primary key
-#  email         :string(255)
-#  name          :string(255)
-#  sub           :string(255)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#  sponsor_id    :bigint           not null
-#
-# Indexes
-#
-#  index_sponsor_contacts_on_conference_id  (conference_id)
-#  index_sponsor_contacts_on_sponsor_id     (sponsor_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 FactoryBot.define do
   factory :sponsor_contact
 
diff --git a/spec/factories/sponsor_speaker_invite_accepts.rb b/spec/factories/sponsor_speaker_invite_accepts.rb
index 96c92dd9a..ced24a90a 100644
--- a/spec/factories/sponsor_speaker_invite_accepts.rb
+++ b/spec/factories/sponsor_speaker_invite_accepts.rb
@@ -1,34 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsor_speaker_invite_accepts
-#
-#  id                        :bigint           not null, primary key
-#  created_at                :datetime         not null
-#  updated_at                :datetime         not null
-#  conference_id             :bigint           not null
-#  speaker_id                :bigint           not null
-#  sponsor_contact_id        :bigint           not null
-#  sponsor_id                :bigint           not null
-#  sponsor_speaker_invite_id :bigint           not null
-#
-# Indexes
-#
-#  idx_spk_inv_accepts_on_conf_spsr_speaker_contact            (conference_id,sponsor_id,speaker_id,sponsor_contact_id) UNIQUE
-#  idx_spk_inv_accepts_on_invite                               (sponsor_speaker_invite_id)
-#  index_sponsor_speaker_invite_accepts_on_conference_id       (conference_id)
-#  index_sponsor_speaker_invite_accepts_on_speaker_id          (speaker_id)
-#  index_sponsor_speaker_invite_accepts_on_sponsor_contact_id  (sponsor_contact_id)
-#  index_sponsor_speaker_invite_accepts_on_sponsor_id          (sponsor_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (speaker_id => speakers.id)
-#  fk_rails_...  (sponsor_contact_id => sponsor_contacts.id)
-#  fk_rails_...  (sponsor_id => sponsors.id)
-#  fk_rails_...  (sponsor_speaker_invite_id => sponsor_speaker_invites.id)
-#
-
 FactoryBot.define do
   factory :sponsor_speaker_invite_accept do
     conference
diff --git a/spec/factories/sponsor_speaker_invites.rb b/spec/factories/sponsor_speaker_invites.rb
index c6988c0df..6d005b39a 100644
--- a/spec/factories/sponsor_speaker_invites.rb
+++ b/spec/factories/sponsor_speaker_invites.rb
@@ -1,27 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsor_speaker_invites
-#
-#  id            :bigint           not null, primary key
-#  email         :string(255)      not null
-#  expires_at    :datetime         not null
-#  token         :string(255)      not null
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#  sponsor_id    :bigint           not null
-#
-# Indexes
-#
-#  index_sponsor_speaker_invites_on_conference_id  (conference_id)
-#  index_sponsor_speaker_invites_on_sponsor_id     (sponsor_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (sponsor_id => sponsors.id)
-#
-
 FactoryBot.define do
   factory :sponsor_speaker_invite do
     email { 'speaker@example.com' }
diff --git a/spec/factories/sponsor_types.rb b/spec/factories/sponsor_types.rb
index d4b9720c2..c05002033 100644
--- a/spec/factories/sponsor_types.rb
+++ b/spec/factories/sponsor_types.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsor_types
-#
-#  id            :bigint           not null, primary key
-#  name          :string(255)
-#  order         :integer
-#  visible       :boolean          default(TRUE)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_sponsor_types_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 FactoryBot.define do
   factory :sponsor_type do
     conference { nil }
diff --git a/spec/factories/sponsors.rb b/spec/factories/sponsors.rb
index 58e43117b..e2f7598bd 100644
--- a/spec/factories/sponsors.rb
+++ b/spec/factories/sponsors.rb
@@ -1,25 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsors
-#
-#  id            :bigint           not null, primary key
-#  abbr          :string(255)
-#  description   :text(65535)
-#  name          :string(255)
-#  url           :string(255)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_sponsors_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 FactoryBot.define do
   factory :sponsor do
     id { 1 }
diff --git a/spec/factories/sponsors_sponsor_types.rb b/spec/factories/sponsors_sponsor_types.rb
index 2e507c330..7b81494e8 100644
--- a/spec/factories/sponsors_sponsor_types.rb
+++ b/spec/factories/sponsors_sponsor_types.rb
@@ -1,14 +1,3 @@
-# == Schema Information
-#
-# Table name: sponsors_sponsor_types
-#
-#  id              :bigint           not null, primary key
-#  created_at      :datetime         not null
-#  updated_at      :datetime         not null
-#  sponsor_id      :integer
-#  sponsor_type_id :integer
-#
-
 FactoryBot.define do
   factory :sponsors_sponsor_type do
   end
diff --git a/spec/factories/stamp_rally_check_ins.rb b/spec/factories/stamp_rally_check_ins.rb
index e77807087..eb569b46f 100644
--- a/spec/factories/stamp_rally_check_ins.rb
+++ b/spec/factories/stamp_rally_check_ins.rb
@@ -1,23 +1,3 @@
-# == Schema Information
-#
-# Table name: stamp_rally_check_ins
-#
-#  id                         :string(26)       not null, primary key
-#  check_in_timestamp         :datetime         not null
-#  profile_id                 :bigint           not null
-#  stamp_rally_check_point_id :string(26)       not null
-#
-# Indexes
-#
-#  index_stamp_rally_check_ins_on_profile_id                  (profile_id)
-#  index_stamp_rally_check_ins_on_stamp_rally_check_point_id  (stamp_rally_check_point_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (profile_id => profiles.id)
-#  fk_rails_...  (stamp_rally_check_point_id => stamp_rally_check_points.id)
-#
-
 FactoryBot.define do
   factory :stamp_rally_check_in, class: StampRallyCheckIn do
   end
diff --git a/spec/factories/stats_of_registrants.rb b/spec/factories/stats_of_registrants.rb
index 867df2f51..f6d75c390 100644
--- a/spec/factories/stats_of_registrants.rb
+++ b/spec/factories/stats_of_registrants.rb
@@ -1,19 +1,3 @@
-# == Schema Information
-#
-# Table name: stats_of_registrants
-#
-#  id                    :bigint           not null, primary key
-#  number_of_registrants :integer
-#  offline_attendees     :decimal(10, )
-#  online_attendees      :decimal(10, )
-#  created_at            :datetime         not null
-#  updated_at            :datetime         not null
-#  conference_id         :bigint
-#
-# Indexes
-#
-#  index_stats_of_registrants_on_conference_id  (conference_id)
-#
 FactoryBot.define do
   factory :stats_of_registrant
 end
diff --git a/spec/factories/streamings.rb b/spec/factories/streamings.rb
index eb0c39330..5d2909b8c 100644
--- a/spec/factories/streamings.rb
+++ b/spec/factories/streamings.rb
@@ -1,27 +1,3 @@
-# == Schema Information
-#
-# Table name: streamings
-#
-#  id            :string(255)      not null, primary key
-#  error_cause   :text(65535)
-#  status        :string(255)      not null
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#  track_id      :bigint           not null
-#
-# Indexes
-#
-#  index_streamings_on_conference_id               (conference_id)
-#  index_streamings_on_conference_id_and_track_id  (conference_id,track_id) UNIQUE
-#  index_streamings_on_track_id                    (track_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (track_id => tracks.id)
-#
-
 FactoryBot.define do
   factory :streaming, class: Streaming
 end
diff --git a/spec/factories/talk_categories.rb b/spec/factories/talk_categories.rb
index 28a348168..9096965df 100644
--- a/spec/factories/talk_categories.rb
+++ b/spec/factories/talk_categories.rb
@@ -1,18 +1,3 @@
-# == Schema Information
-#
-# Table name: talk_categories
-#
-#  id            :bigint           not null, primary key
-#  name          :string(255)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :integer
-#
-# Indexes
-#
-#  index_talk_categories_on_conference_id  (conference_id)
-#
-
 FactoryBot.define do
   factory :talk_category
 
diff --git a/spec/factories/talk_difficulties.rb b/spec/factories/talk_difficulties.rb
index 775c94e24..6f5fb5057 100644
--- a/spec/factories/talk_difficulties.rb
+++ b/spec/factories/talk_difficulties.rb
@@ -1,18 +1,3 @@
-# == Schema Information
-#
-# Table name: talk_difficulties
-#
-#  id            :bigint           not null, primary key
-#  name          :string(255)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :integer
-#
-# Indexes
-#
-#  index_talk_difficulties_on_conference_id  (conference_id)
-#
-
 FactoryBot.define do
   factory :talk_difficulty
 
diff --git a/spec/factories/talk_times.rb b/spec/factories/talk_times.rb
index 23c3336b2..c315c3865 100644
--- a/spec/factories/talk_times.rb
+++ b/spec/factories/talk_times.rb
@@ -1,22 +1,3 @@
-# == Schema Information
-#
-# Table name: talk_times
-#
-#  id            :bigint           not null, primary key
-#  time_minutes  :integer
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_talk_times_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
-
 FactoryBot.define do
   factory :talk_time do
     conference { nil }
diff --git a/spec/factories/talk_types.rb b/spec/factories/talk_types.rb
index c8521d669..691266a3e 100644
--- a/spec/factories/talk_types.rb
+++ b/spec/factories/talk_types.rb
@@ -1,11 +1,3 @@
-# == Schema Information
-#
-# Table name: talk_types
-#
-#  id         :string(255)      not null, primary key
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#
 FactoryBot.define do
   factory :talk_type, class: Talk::Type do
     initialize_with { Talk::Type.find_or_initialize_by(id:) }
diff --git a/spec/factories/talks.rb b/spec/factories/talks.rb
index 353031cda..daa20b29f 100644
--- a/spec/factories/talks.rb
+++ b/spec/factories/talks.rb
@@ -1,46 +1,3 @@
-# == Schema Information
-#
-# Table name: talks
-#
-#  id                    :bigint           not null, primary key
-#  abstract              :text(65535)
-#  acquired_seats        :integer          default(0), not null
-#  document_url          :string(255)
-#  end_offset            :integer          default(0), not null
-#  end_time              :time
-#  execution_phases      :json
-#  expected_participants :json
-#  movie_url             :string(255)
-#  number_of_seats       :integer          default(0), not null
-#  show_on_timetable     :boolean
-#  start_offset          :integer          default(0), not null
-#  start_time            :time
-#  title                 :string(255)
-#  type                  :string(255)      not null
-#  video_published       :boolean          default(FALSE), not null
-#  created_at            :datetime         not null
-#  updated_at            :datetime         not null
-#  conference_day_id     :integer
-#  conference_id         :integer
-#  sponsor_id            :integer
-#  talk_category_id      :bigint
-#  talk_difficulty_id    :bigint
-#  talk_time_id          :integer
-#  track_id              :integer
-#
-# Indexes
-#
-#  fk_rails_9c6f538eea                (type)
-#  index_talks_on_conference_id       (conference_id)
-#  index_talks_on_talk_category_id    (talk_category_id)
-#  index_talks_on_talk_difficulty_id  (talk_difficulty_id)
-#  index_talks_on_track_id            (track_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (type => talk_types.id)
-#
-
 FactoryBot.define do
   factory :talk
 
diff --git a/spec/factories/talks_speakers.rb b/spec/factories/talks_speakers.rb
index dc0d228ac..25a1cbf4e 100644
--- a/spec/factories/talks_speakers.rb
+++ b/spec/factories/talks_speakers.rb
@@ -1,17 +1,3 @@
-# == Schema Information
-#
-# Table name: talks_speakers
-#
-#  id         :bigint           not null, primary key
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#  speaker_id :integer
-#  talk_id    :integer
-#
-# Indexes
-#
-#  index_talks_speakers_on_speaker_id  (speaker_id)
-#
 FactoryBot.define do
   factory :talks_speaker
 end
diff --git a/spec/factories/tracks.rb b/spec/factories/tracks.rb
index f96de8728..4e954645b 100644
--- a/spec/factories/tracks.rb
+++ b/spec/factories/tracks.rb
@@ -1,22 +1,3 @@
-# == Schema Information
-#
-# Table name: tracks
-#
-#  id             :bigint           not null, primary key
-#  name           :string(255)
-#  number         :integer
-#  video_platform :string(255)
-#  created_at     :datetime         not null
-#  updated_at     :datetime         not null
-#  conference_id  :integer
-#  room_id        :bigint           default(0)
-#  video_id       :string(255)
-#
-# Indexes
-#
-#  index_tracks_on_conference_id  (conference_id)
-#
-
 FactoryBot.define do
   factory :track, class: Track do
     video_platform { 'vimeo' }
diff --git a/spec/factories/video_registrations.rb b/spec/factories/video_registrations.rb
index 9c39d722d..b7b5ddadb 100644
--- a/spec/factories/video_registrations.rb
+++ b/spec/factories/video_registrations.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: video_registrations
-#
-#  id         :bigint           not null, primary key
-#  statistics :json             not null
-#  status     :integer          default("unsubmitted"), not null
-#  url        :string(255)
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#  talk_id    :bigint           not null
-#
-# Indexes
-#
-#  index_video_registrations_on_talk_id  (talk_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (talk_id => talks.id)
-#
-
 FactoryBot.define do
   factory :video_registration do
     id { 1 }
diff --git a/spec/factories/videos.rb b/spec/factories/videos.rb
index 6a334d5bf..956218284 100644
--- a/spec/factories/videos.rb
+++ b/spec/factories/videos.rb
@@ -1,18 +1,3 @@
-# == Schema Information
-#
-# Table name: videos
-#
-#  id              :bigint           not null, primary key
-#  on_air          :boolean
-#  site            :string(255)
-#  url             :string(255)
-#  video_file_data :text(65535)
-#  created_at      :datetime         not null
-#  updated_at      :datetime         not null
-#  talk_id         :integer
-#  video_id        :string(255)
-#
-
 FactoryBot.define do
   factory :video do
     talk_id { 1 }
diff --git a/spec/factories/viewer_counts.rb b/spec/factories/viewer_counts.rb
index d20d6e022..0531a67c6 100644
--- a/spec/factories/viewer_counts.rb
+++ b/spec/factories/viewer_counts.rb
@@ -1,23 +1,3 @@
-# == Schema Information
-#
-# Table name: viewer_counts
-#
-#  id            :bigint           not null, primary key
-#  count         :integer
-#  stream_type   :string(255)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :integer
-#  talk_id       :integer
-#  track_id      :integer
-#
-# Indexes
-#
-#  index_viewer_counts_on_conference_id  (conference_id)
-#  index_viewer_counts_on_talk_id        (talk_id)
-#  index_viewer_counts_on_track_id       (track_id)
-#
-
 FactoryBot.define do
   factory :cndt2021_viewer_count, class: ViewerCount do
     conference_id { 4 }
diff --git a/spec/models/chat_message_spec.rb b/spec/models/chat_message_spec.rb
index 03fc63b09..bc9e54e8e 100644
--- a/spec/models/chat_message_spec.rb
+++ b/spec/models/chat_message_spec.rb
@@ -1,39 +1,3 @@
-# == Schema Information
-#
-# Table name: chat_messages
-#
-#  id             :bigint           not null, primary key
-#  body           :text(65535)
-#  children_count :integer          default(0), not null
-#  depth          :integer          default(0), not null
-#  lft            :integer          not null
-#  message_type   :integer
-#  rgt            :integer          not null
-#  room_type      :string(255)
-#  created_at     :datetime         not null
-#  updated_at     :datetime         not null
-#  conference_id  :bigint           not null
-#  parent_id      :integer
-#  profile_id     :bigint
-#  room_id        :bigint
-#  speaker_id     :bigint
-#
-# Indexes
-#
-#  index_chat_messages_on_conference_id  (conference_id)
-#  index_chat_messages_on_lft            (lft)
-#  index_chat_messages_on_parent_id      (parent_id)
-#  index_chat_messages_on_profile_id     (profile_id)
-#  index_chat_messages_on_rgt            (rgt)
-#  index_chat_messages_on_speaker_id     (speaker_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#  fk_rails_...  (profile_id => profiles.id)
-#  fk_rails_...  (speaker_id => speakers.id)
-#
-
 require 'rails_helper'
 
 RSpec.describe(ChatMessage, type: :model) do
diff --git a/spec/models/conference_spec.rb b/spec/models/conference_spec.rb
index 87bdd8c8a..a1d0aa666 100644
--- a/spec/models/conference_spec.rb
+++ b/spec/models/conference_spec.rb
@@ -1,37 +1,3 @@
-# == Schema Information
-#
-# Table name: conferences
-#
-#  id                         :bigint           not null, primary key
-#  abbr                       :string(255)
-#  about                      :text(65535)
-#  attendee_entry             :integer          default("attendee_entry_disabled")
-#  brief                      :string(255)
-#  capacity                   :integer
-#  cfp_result_visible         :boolean          default(FALSE)
-#  coc                        :text(65535)
-#  committee_name             :string(255)      default("CloudNative Days Committee"), not null
-#  conference_status          :string(255)      default("registered")
-#  contact_url                :text(65535)
-#  copyright                  :string(255)
-#  name                       :string(255)
-#  privacy_policy             :text(65535)
-#  privacy_policy_for_speaker :text(65535)
-#  rehearsal_mode             :boolean          default(FALSE), not null
-#  show_sponsors              :boolean          default(FALSE)
-#  show_timetable             :integer          default("show_timetable_disabled")
-#  speaker_entry              :integer          default("speaker_entry_disabled")
-#  sponsor_guideline_url      :text(65535)
-#  theme                      :text(65535)
-#  created_at                 :datetime         not null
-#  updated_at                 :datetime         not null
-#
-# Indexes
-#
-#  index_conferences_on_abbr                        (abbr)
-#  index_conferences_on_abbr_and_conference_status  (abbr,conference_status)
-#
-
 require 'rails_helper'
 
 RSpec.describe(Conference, type: :model) do
diff --git a/spec/models/form_item_spec.rb b/spec/models/form_item_spec.rb
index b6d50da9e..5625ff3de 100644
--- a/spec/models/form_item_spec.rb
+++ b/spec/models/form_item_spec.rb
@@ -1,14 +1,3 @@
-# == Schema Information
-#
-# Table name: form_items
-#
-#  id            :bigint           not null, primary key
-#  attr          :string(255)
-#  name          :string(255)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :integer
-#
 require 'rails_helper'
 
 RSpec.describe(FormItem, type: :model) do
diff --git a/spec/models/form_value_spec.rb b/spec/models/form_value_spec.rb
index 1d31e1625..91837193a 100644
--- a/spec/models/form_value_spec.rb
+++ b/spec/models/form_value_spec.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: form_values
-#
-#  id           :bigint           not null, primary key
-#  value        :string(255)
-#  created_at   :datetime         not null
-#  updated_at   :datetime         not null
-#  form_item_id :bigint           not null
-#  profile_id   :bigint           not null
-#
-# Indexes
-#
-#  index_form_values_on_form_item_id  (form_item_id)
-#  index_form_values_on_profile_id    (profile_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (form_item_id => form_items.id)
-#  fk_rails_...  (profile_id => profiles.id)
-#
 require 'rails_helper'
 
 RSpec.describe(FormValue, type: :model) do
diff --git a/spec/models/profile_spec.rb b/spec/models/profile_spec.rb
index 687c03887..e8a848430 100644
--- a/spec/models/profile_spec.rb
+++ b/spec/models/profile_spec.rb
@@ -1,41 +1,3 @@
-# == Schema Information
-#
-# Table name: profiles
-#
-#  id                            :bigint           not null, primary key
-#  calendar_unique_code          :string(255)
-#  company_address               :string(255)
-#  company_address_level1        :string(255)
-#  company_address_level2        :string(255)
-#  company_address_line1         :string(255)
-#  company_address_line2         :string(255)
-#  company_email                 :string(255)
-#  company_fax                   :string(255)
-#  company_name                  :string(255)
-#  company_postal_code           :string(255)
-#  company_tel                   :string(255)
-#  department                    :string(255)
-#  email                         :string(255)
-#  first_name                    :string(255)
-#  first_name_kana               :string(255)
-#  last_name                     :string(255)
-#  last_name_kana                :string(255)
-#  occupation                    :string(255)
-#  participation                 :string(255)
-#  position                      :string(255)
-#  sub                           :string(255)
-#  created_at                    :datetime         not null
-#  updated_at                    :datetime         not null
-#  annual_sales_id               :integer          default(11)
-#  company_address_prefecture_id :string(255)
-#  company_name_prefix_id        :string(255)
-#  company_name_suffix_id        :string(255)
-#  conference_id                 :integer
-#  industry_id                   :integer
-#  number_of_employee_id         :integer          default(12)
-#  occupation_id                 :integer          default(34)
-#
-
 require 'rails_helper'
 
 RSpec.describe(Profile, type: :model) do
diff --git a/spec/models/registered_talk_spec.rb b/spec/models/registered_talk_spec.rb
index b03e5d4b8..bbfdc29e2 100644
--- a/spec/models/registered_talk_spec.rb
+++ b/spec/models/registered_talk_spec.rb
@@ -1,14 +1,3 @@
-# == Schema Information
-#
-# Table name: registered_talks
-#
-#  id         :bigint           not null, primary key
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#  profile_id :integer
-#  talk_id    :integer
-#
-
 require 'rails_helper'
 
 RSpec.describe(RegisteredTalk, type: :model) do
diff --git a/spec/models/speaker_announcement_spec.rb b/spec/models/speaker_announcement_spec.rb
index b40ae0cee..6965a06d8 100644
--- a/spec/models/speaker_announcement_spec.rb
+++ b/spec/models/speaker_announcement_spec.rb
@@ -1,24 +1,3 @@
-# == Schema Information
-#
-# Table name: speaker_announcements
-#
-#  id            :bigint           not null, primary key
-#  body          :text(65535)      not null
-#  publish       :boolean          default(FALSE)
-#  publish_time  :datetime         not null
-#  receiver      :integer          default("person"), not null
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :bigint           not null
-#
-# Indexes
-#
-#  index_speaker_announcements_on_conference_id  (conference_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (conference_id => conferences.id)
-#
 require 'rails_helper'
 
 RSpec.describe(SpeakerAnnouncement, type: :model) do
diff --git a/spec/models/speaker_spec.rb b/spec/models/speaker_spec.rb
index 279a7c704..e492b6d1a 100644
--- a/spec/models/speaker_spec.rb
+++ b/spec/models/speaker_spec.rb
@@ -1,29 +1,3 @@
-# == Schema Information
-#
-# Table name: speakers
-#
-#  id                   :bigint           not null, primary key
-#  additional_documents :text(65535)
-#  avatar_data          :text(65535)
-#  company              :string(255)
-#  email                :text(65535)
-#  job_title            :string(255)
-#  name                 :string(255)
-#  name_mother_tongue   :string(255)
-#  profile              :text(65535)
-#  sub                  :text(65535)
-#  created_at           :datetime         not null
-#  updated_at           :datetime         not null
-#  conference_id        :integer
-#  github_id            :string(255)
-#  sponsor_id           :bigint
-#  twitter_id           :string(255)
-#
-# Indexes
-#
-#  index_speakers_on_conference_id_and_email  (conference_id,email)
-#
-
 require 'rails_helper'
 
 RSpec.describe(Speaker, type: :model) do
diff --git a/spec/models/talk_spec.rb b/spec/models/talk_spec.rb
index f63821351..df6a5dccb 100644
--- a/spec/models/talk_spec.rb
+++ b/spec/models/talk_spec.rb
@@ -1,46 +1,3 @@
-# == Schema Information
-#
-# Table name: talks
-#
-#  id                    :bigint           not null, primary key
-#  abstract              :text(65535)
-#  acquired_seats        :integer          default(0), not null
-#  document_url          :string(255)
-#  end_offset            :integer          default(0), not null
-#  end_time              :time
-#  execution_phases      :json
-#  expected_participants :json
-#  movie_url             :string(255)
-#  number_of_seats       :integer          default(0), not null
-#  show_on_timetable     :boolean
-#  start_offset          :integer          default(0), not null
-#  start_time            :time
-#  title                 :string(255)
-#  type                  :string(255)      not null
-#  video_published       :boolean          default(FALSE), not null
-#  created_at            :datetime         not null
-#  updated_at            :datetime         not null
-#  conference_day_id     :integer
-#  conference_id         :integer
-#  sponsor_id            :integer
-#  talk_category_id      :bigint
-#  talk_difficulty_id    :bigint
-#  talk_time_id          :integer
-#  track_id              :integer
-#
-# Indexes
-#
-#  fk_rails_9c6f538eea                (type)
-#  index_talks_on_conference_id       (conference_id)
-#  index_talks_on_talk_category_id    (talk_category_id)
-#  index_talks_on_talk_difficulty_id  (talk_difficulty_id)
-#  index_talks_on_track_id            (track_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (type => talk_types.id)
-#
-
 require 'rails_helper'
 
 describe Talk, type: :model do
diff --git a/spec/models/viewer_count_spec.rb b/spec/models/viewer_count_spec.rb
index 5253acb67..1bf8dfe8d 100644
--- a/spec/models/viewer_count_spec.rb
+++ b/spec/models/viewer_count_spec.rb
@@ -1,23 +1,3 @@
-# == Schema Information
-#
-# Table name: viewer_counts
-#
-#  id            :bigint           not null, primary key
-#  count         :integer
-#  stream_type   :string(255)
-#  created_at    :datetime         not null
-#  updated_at    :datetime         not null
-#  conference_id :integer
-#  talk_id       :integer
-#  track_id      :integer
-#
-# Indexes
-#
-#  index_viewer_counts_on_conference_id  (conference_id)
-#  index_viewer_counts_on_talk_id        (talk_id)
-#  index_viewer_counts_on_track_id       (track_id)
-#
-
 require 'rails_helper'
 
 RSpec.describe(ViewerCount, type: :model) do