Indexes added to created_at Field in Issue, PullRequest, and Release Models (#1183)

* Add feature: index on created_at field in issue model

* Add feature: index on created_at field in PullRequest model

* Add feature: index on created_at field in Release model

* Add feature: indexes on created_at in Issue, PullRequest, and Release models

* Update code

---------

Co-authored-by: Arkadii Yakovets <[email protected]>

Author: Simoh23999

backend/apps/github/migrations/0019_issue_github_issu_created_4afbcc_idx_and_more.py

@@ -0,0 +1,24 @@
+# Generated by Django 5.1.7 on 2025-03-26 16:08
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("github", "0018_alter_issue_managers_alter_pullrequest_managers"),
+    ]
+
+    operations = [
+        migrations.AddIndex(
+            model_name="issue",
+            index=models.Index(fields=["-created_at"], name="github_issu_created_4afbcc_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="pullrequest",
+            index=models.Index(fields=["-created_at"], name="github_pull_created_190b3c_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="release",
+            index=models.Index(fields=["-created_at"], name="github_rele_created_d51966_idx"),
+        ),
+    ]

backend/apps/github/models/issue.py

@@ -21,6 +21,9 @@ class Issue(GenericIssueModel):
 
     class Meta:
         db_table = "github_issues"
+        indexes = [
+            models.Index(fields=["-created_at"]),
+        ]
         ordering = ("-updated_at", "-state")
         verbose_name_plural = "Issues"
 

backend/apps/github/models/pull_request.py

@@ -16,6 +16,9 @@ class PullRequest(GenericIssueModel):
 
     class Meta:
         db_table = "github_pull_requests"
+        indexes = [
+            models.Index(fields=["-created_at"]),
+        ]
         ordering = ("-updated_at", "-state")
         verbose_name_plural = "Pull Requests"
 

backend/apps/github/models/release.py

@@ -12,6 +12,9 @@ class Release(BulkSaveModel, NodeModel, ReleaseIndexMixin, TimestampedModel):
 
     class Meta:
         db_table = "github_releases"
+        indexes = [
+            models.Index(fields=["-created_at"]),
+        ]
         verbose_name_plural = "Releases"
 
     name = models.CharField(verbose_name="Name", max_length=200)