rest_framework.permissions.BasePermission causes a Metaclass conflict error

[mattwwarren]

Bug report

What's wrong

After upgrading to mypy 0.990 (from 0.982), the following code example causes a Metaclass conflict

from rest_framework.permissions import BasePermission

class OrgPermissions(BasePermission):
    ...

How it should be

Running mypy on the above class should not cause

error: Metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases [misc]

I'm also willing to accept this is an improper use of Metaclasses by drf directly but I've never seen this error in running code so I figured I would start with a bug here.

System information

• OS: Linux
• python version: 3.9.x
• django version: 4.0.x
• mypy version: 0.990
• django-stubs version: 1.12.x

[jwhitlock]

Also seen in PR #280, signature of BasePermission changed. Updating to djangorestframework-stubs 1.8.0, which includes that change, fixed it for me.

[dmartin]

Upgrading to 1.8.0 resolved this error for me as well.

[mattwwarren]

Can confirm upgrading to 1.8.0 fixed the original issue. Thank you!