django_stubs_ext.monkeypatch() does not work properly

[egregors]

Bug report

What's wrong

I have  django_stubs and django_stubs_ext installed.
I have called monkeypatch() in the base Django settings file.
But still, got mypy errors for an absolutely generic Django Admin code:

admin.py

# ...
@admin.register(Content)
class ContentAdmin(admin.ModelAdmin):
    # ...
    def foo(self, obj: Content) -> Foo:
        return obj.bar.foo

    foo.short_description = _('Foo short description')
    foo.admin_order_field = 'foo__bar'

mypy errors

 error: Missing type parameters for generic type "ModelAdmin"
 error: "Callable[[SectionProgressAdmin, SectionProgress], Any]" has no attribute "short_description"

How is that should be

According to this issue (#507), calling monkeypatch() should resolve this problem. But, for some reason, it wasn't.

System information

• OS: MacOS 11.1
• python version: 3.9
• django version: 3.1.5
• mypy version: 0.790
• django-stubs version: 1.7.0
• django_stubs_ext version: 0.1.0

[sobolevn]

Try class ContentAdmin(admin.ModelAdmin[Content]):, this error error: Missing type parameters for generic type "ModelAdmin" will go away.

[egregors]

Thanks a lot! 🔥 🔥 🔥 It solved Missing type parameters for generic type "ModelAdmin" issue.

Does it exist any known way to resolve has no attribute "short_description", has no attribute "admin_order_field" errors?

Looks like this workaround is the only way: python/mypy#2087 (comment)

[sobolevn]

I use # type: ignore as my go-to workaround. Because that's the easiest way.

I would love to get more typing support here, because sometimes I make typos like sohrt_description and it just silently ignores it.

I am going to close this ticket. Feel free to reopen it or open new ones! 👍

[Milutinke92]

Thanks a lot! 🔥 🔥 🔥 It solved Missing type parameters for generic type "ModelAdmin" issue.

Does it exist any known way to resolve has no attribute "short_description", has no attribute "admin_order_field" errors?

Looks like this workaround is the only way: python/mypy#2087 (comment)

When I do this, I get TypeError: type 'ModelAdmin' is not subscriptable. Whats wrong?