Django QuerySet Type Hinting Issue

The warning you're seeing in PyCharm about QuerySet[MemberMetaModel, MemberMetaModel] vs. QuerySet[MemberMetaModel] appears to be a type hinting issue related to how Django's QuerySet type annotations are interpreted.

Understanding the Issue

In Django, a QuerySet typically has a single type parameter that represents the model being queried. The warning suggests PyCharm is expecting a QuerySet with two type parameters, which is unusual and likely incorrect.

Solutions

Option 1: Ignore the Warning

If you believe the warning is incorrect (which it likely is), you can suppress it in PyCharm:

1. Add a comment to suppress the specific warning:

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# noinspection PyTypeChecker
your_queryset = MemberMetaModel.objects.filter(...)

2. Or use type ignore comments:

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your_queryset = MemberMetaModel.objects.filter(...)  # type: ignore

Option 2: Explicitly Annotate the Type

You can explicitly annotate the variable with the correct type:

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from django.db.models.query import QuerySet

your_queryset: QuerySet[MemberMetaModel] = MemberMetaModel.objects.filter(...)

Option 3: Check Your Django Stubs

This issue might be related to the type stubs you're using for Django. Make sure you have the correct django-stubs package installed:

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pip install django-stubs

And configure mypy properly in your mypy.ini or pyproject.toml:

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[mypy]
plugins = mypy_django_plugin.main

[mypy.plugins.django-stubs]
django_settings_module = "your_project.settings"

Additional Context

Django's QuerySet type checking has evolved over time, and the behavior you're seeing might be related to how Django enforces type checking for query relations, which was improved in Django 1.8 to prevent incorrect lookups by checking object types.

If you're still experiencing issues after trying these solutions, you might want to share more of your actual code to get more specific guidance.