mypy can’t build migration graph

[VityasZV]

Bug report

What's wrong

i have a django project, is runs and works correctly. But when I try to launch mypy, it shows some errors:
`mypy src --install-types --namespace-packages --implicit-reexport --config-file ./pyproject.toml
Error constructing plugin instance of NewSemanalDjangoPlugin

Traceback (most recent call last):
  File "/Users/viktorzadabin/HipHub/backend/venv/bin/mypy", line 8, in <module>
    sys.exit(console_entry())
  File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/mypy/__main__.py", line 15, in console_entry
    main()
  File "mypy/main.py", line 95, in main
  File "mypy/main.py", line 174, in run_build
  File "mypy/build.py", line 193, in build
  File "mypy/build.py", line 248, in _build
  File "mypy/build.py", line 507, in load_plugins
  File "mypy/build.py", line 488, in load_plugins_from_config
  File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/mypy_django_plugin/main.py", line 73, in __init__
    self.django_context = DjangoContext(self.plugin_config.django_settings_module)
  File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/mypy_django_plugin/django/context.py", line 83, in __init__
    apps, settings = initialize_django(self.django_settings_module)
  File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/mypy_django_plugin/django/context.py", line 67, in initialize_django
    apps.populate(settings.INSTALLED_APPS)
  File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/django/apps/registry.py", line 124, in populate
    app_config.ready()
  File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/django_prometheus/apps.py", line 23, in ready
    ExportMigrations()
  File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/django_prometheus/migrations.py", line 52, in ExportMigrations
    executor = MigrationExecutor(connections[alias])
  File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/django/db/migrations/executor.py", line 18, in __init__
    self.loader = MigrationLoader(self.connection)
  File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/django/db/migrations/loader.py", line 58, in __init__
    self.build_graph()
  File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/django/db/migrations/loader.py", line 276, in build_graph
    self.graph.validate_consistency()
  File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/django/db/migrations/graph.py", line 198, in validate_consistency
    [n.raise_error() for n in self.node_map.values() if isinstance(n, DummyNode)]
  File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/django/db/migrations/graph.py", line 198, in <listcomp>
    [n.raise_error() for n in self.node_map.values() if isinstance(n, DummyNode)]
  File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/django/db/migrations/graph.py", line 60, in raise_error
    raise NodeNotFoundError(self.error_message, self.key, origin=self.origin)
django.db.migrations.exceptions.NodeNotFoundError: Migration hub.0002_initial dependencies reference nonexistent parent node ('profile', '0001_initial')

but django server runs correctly with all applied migrations

How is that should be

mypy should launch successfully

System information

• OS: MacOS Ventura 13.1
• python version: 3.10.9
• django version: 4.1.4
• mypy version: 0.991
• django-stubs version: 1.13.1
• django-stubs-ext version: 0.7.0

[intgr]

This error seems to indicate that Django can't find the profile application in INSTALLED_APPS.

Maybe INSTALLED_APPS differs between the settings file used in mypy (django_settings_module in mypy configuration) and the settings you're using normally?

[intgr]

In any case this looks like misconfiguration of Django, not a bug in django-stubs.

[VityasZV]

hmmm, seems that mypy looks to correct settings.py file, which contains following INSTALLED_APPS:

INSTALLED_APPS = [
    "grappelli",
    "django.contrib.postgres",
    "django.contrib.admin",
    "django.contrib.auth",
    "django.contrib.contenttypes",
    "django.contrib.sessions",
    "django.contrib.messages",
    "django.contrib.sites",
    "allauth",
    "allauth.account",
    "allauth.socialaccount",
    "allauth.socialaccount.providers.google",
    # "allauth.socialaccount.providers.apple",
    # "allauth.socialaccount.providers.facebook",
    # "allauth.socialaccount.providers.telegram",
    # "allauth.socialaccount.providers.vk",
    # "allauth.socialaccount.providers.yandex",
    # "allauth.socialaccount.providers.mailru",
    "ninja_extra",
    "ninja_jwt",
    "django.contrib.staticfiles",
    #"django_prometheus",
    "django_dramatiq",
    "hub",
    "profile",
    "tag",
]

so, profile app is there.

I’ve tried some approaches, for example, I’ve deleted django_prometheus from installed apps, and error text has changed:
(venv) ➜ backend git:(feature/hip-47) ✗ make mypy
mypy . --install-types --namespace-packages --implicit-reexport --config-file ./pyproject.toml
Traceback (most recent call last):
File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/django/apps/config.py", line 235, in get_model
return self.models[model_name.lower()]
KeyError: 'hiphubuser'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/Users/viktorzadabin/HipHub/backend/venv/bin/mypy", line 8, in
sys.exit(console_entry())
File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/mypy/main.py", line 15, in console_entry
main()
File "mypy/main.py", line 95, in main
File "mypy/main.py", line 174, in run_build
File "mypy/build.py", line 193, in build
File "mypy/build.py", line 276, in _build
File "mypy/build.py", line 2850, in dispatch
File "mypy/build.py", line 3026, in load_graph
File "mypy/build.py", line 1999, in init
File "mypy/build.py", line 2290, in compute_dependencies
File "mypy/plugin.py", line 835, in get_additional_deps
File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/mypy_django_plugin/main.py", line 154, in get_additional_deps
related_model_cls = self.django_context.get_field_related_model_cls(field)
File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/mypy_django_plugin/django/context.py", line 347, in get_field_related_model_cls
related_model_cls = self.apps_registry.get_model(related_model_cls)
File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/django/apps/registry.py", line 213, in get_model
return app_config.get_model(model_name, require_ready=require_ready)
File "/Users/viktorzadabin/HipHub/backend/venv/lib/python3.10/site-packages/django/apps/config.py", line 237, in get_model
raise LookupError(
LookupError: App 'profile' doesn't have a 'HipHubUser' model.

Maybe now it’s easier to help me with this situation

[intgr]

PR #1342 by flaeppe changed this logic to indicate a mypy error in code, instead of crashing. This can be suppressed with a # type: ignore comment.

If the next release doesn't fix your use case, feel free to reopen.

[intgr]

1.14.0 has been released.