Typing issue with actions of generic ModelViewSet

[H4rryK4ne]

Bug report

What's wrong

I have defined a BaseModelViewSet

from abc import ABCMeta, abstractmethod
from http import HTTPMethod

from django.db.models import QuerySet
from rest_framework.decorators import action
from rest_framework.request import Request
from rest_framework.response import Response
from rest_framework.serializers import ModelSerializer
from rest_framework.viewsets import ModelViewSet

from my_app.models import SomeBaseModel


class BaseModelViewSet[_M: SomeBaseModel](ModelViewSet[_M], metaclass=ABCMeta):
    queryset: QuerySet[_M]
    serializer_class: type[ModelSerializer[_M]]

    @abstractmethod
    @action(detail=False, methods=[HTTPMethod.GET])
    def some_action(self, request: Request) -> Response:
        raise NotImplementedError

And a child view set

from my_app.models import ConcreteModel
from my_app.serializers import ConcreteModelSerializer

class ConcreteModelViewSet(BaseModelViewSet[ConcreteModel]):
    queryset = ConcreteModel.objects.all()
    serializer_class = ConcreteModelSerializer

    @override
    @action(detail=False, methods=[HTTPMethod.GET])
    def some_action(self, request: Request) -> Response:
        return Response({})

I get the error

my_app/view_rest.py:316: error: Signature of "some_action" incompatible with supertype "BaseModelViewSet"  [override]
        def some_action(self, request: Request) -> Response:
        ^
my_app/view_rest.py:316: note:      Superclass:
my_app/view_rest.py:316: note:          ViewSetAction[Callable[[BaseModelViewSet[_M], Request], Response]]
my_app/view_rest.py:316: note:      Subclass:
my_app/view_rest.py:316: note:          ViewSetAction[Callable[[ConcreteModelViewSet, Request], Response]]

If I remove the @action decorator mypy passes.

How is that should be

Mypy should pass

System information

• OS:
• python version: 3.12.7
• django version: 5.1.1
• mypy version: 1.14.1
• django-stubs version: 5.1.2