Filtering from custom DRF actions

[realnot]

I have this ViewSet with relative filters

class CityViewSet(ChoiceMixin, ReadOnlyModelViewSet):
    """
    A simple ViewSet for viewing cities.
    """
    queryset = City.objects.all()
    serializer_class = CitySerializer
    filter_fields = ["id", "code", "name", "land_code", "population", "province", "zone"]

Now ChoiceMixin add an action choices that turn a model into choices

class ChoiceMixin:
    """
    Transform queryset into choices
    """
    @action(detail=False)
    def choices(self, request):
        choices = self.get_queryset().only('pk', 'name').values_list('pk', 'name')
        data = [dict(key=k, value=v) for k, v in choices]

        if self.pagination_class is None:
            return Response(data)

        qs = self.paginator.paginate_queryset(data, self.request, view=self)
        return self.get_paginated_response(qs)

This will allow me to call

http://localhost:8000/api/core/city/  # to return cities with all serialized fields
http://localhost:8000/api/core/city/choices/ # to return only key: value (pk, name) fields

How I can run filters from inside choices mixin before to return response?

[realnot]

I just have to call

self.filter_queryset() passing a queryset like `choices`.

I don't delete question cause could be helpful to other devs.