Bad example

views.py

from rest_framework import viewsets

class GameViewSet(viewsets.ReadOnlyModelViewSet):
    """Game viewset."""

    queryset = Game.objects.all()
    serializer_class = GameSerializer

    def get_queryset(self):
        """Filter class queryset."""
        if self.action == "list":
            if self.request.version != Game.TEEBALL_INTRODUCED_VERSION:
                self.queryset = self.queryset.exclude(type=Game.GameType.TEEBALL)

        return self.queryset