Ejemplo DRF filter con django_filters.

filters.py

class GatoFilter(django_filters.FilterSet):
    class Meta:
        model = Gato
        fields = ['user__pk', ]

install.md

Instalando django-filter

Instalar con pip:

• pip install django-filter.
• Y entonces añadir 'django_filters' a tus INSTALLED_APPS.
• Uso http://django-filter.readthedocs.org/en/latest/usage.html.

models.py

class Gato(models.Model):
    user = models.ForeignKey(User)

serializers.py

class GatosSerializer(serializers.ModelSerializer):

    class Meta:
        model = Gato
        fields = '__all__'

views.py

class GatoView(mixins.CreateModelMixin,
               mixins.ListModelMixin,
               mixins.UpdateModelMixin,
               mixins.DestroyModelMixin,
               mixins.RetrieveModelMixin,
               viewsets.GenericViewSet):
    """ /api/v1/gato/?user__pk=pk_user """
    authentication_classes = (TokenAuthentication, )
    serializer_class = GatoSerializer
    queryset = Gato.objects.all()
    filter_backends = (filters.DjangoFilterBackend, )
    filter_class = GatoFilter
    pass