get_object's default implementation returns None but subclasses
are allowed to override this method and make it return anything.
The returned object would then be passed to other methods
to publish different data for different URL parameters.
https://docs.djangoproject.com/en/4.0/ref/contrib/syndication/
Django 3.2 introduced two new methods: `sign_object` and
`unsign_object` which can sign/unsign "complex data structures" such as
lists, tuples, dictionaries:
https://docs.djangoproject.com/en/3.2/topics/signing/#django.core.signing.TimestampSigner
Because the methods take an arbitrary serializer (a JSON serializer by
default, but not guaranteed), we cannot be sure of the type of `obj`.
* Correct the type of FileField.storage
This instance property can't be a callable. Although the FileField constructor
allows a callable, it is immediately resolved to an instance of Storage.
See: f5802a21c4/django/db/models/fields/files.py (L231-L235)
* Correct the type of FieldFile.storage
This instance property is copied directly from `FileField.storage` and should be
the same type.
See: f5802a21c4/django/db/models/fields/files.py (L21)
* Add failing test for relation to model inheriting `objects`
Fails with:
```
pytest_mypy_plugins.utils.TypecheckAssertionError: Invalid output:
Expected:
main:2: note: Revealed type is "myapp.models.MyUser*"
main:3: note: Revealed type is "myapp.models.MyUser*"
<45 (diff)
<45 (diff)
Actual:
main:2: note: Revealed type is "myapp.models.MyUser*"
main:3: note: Revealed type is "myapp.models.MyUser*"
main:6: error: "MyUser" has no attribute "book_set" (diff)
main:6: note: Revealed type is "Any" (diff)
main:7: error: "MyUser" has no attribute "article_set" (diff)
main:7: note: Revealed type is "Any" (diff)
```
* Make AddRelatedManagers look for "objects" on parent model
Previously, AddRelatedManagers would fail if a related model had inherited
its `objects` field from a parent class. This would result in missing
relation attributes. This is fixed by using `get()` instead of `names`;
the former searches the MRO for the symbol, whereas the latter only looks
for symbols declared directly on the class.
Needed, because `django-stubs-ext` generally has to specified as a
production dependency (to use the monkey patching). `django-stubs` does
have `typing-extensions` as a dependency, but it is often used only as a
dev dependency as it has not runtime functionality.
Resolves: https://github.com/typeddjango/django-stubs/issues/702
