在ModelViewSet中使用Django Filters返回序列化数据

Question

我想要合并两个模型：城市和国家/地区，以便拥有这样的过滤器：http://localhost:8000/api/v1/geo/location-search/?name=Santa+Fe

我有一个ModelViewSet，它返回如下的序列化数据：

class LocationSearchAPI(ModelViewSet):
    queryset = City.objects.all().order_by('name')
    permission_classes = [AllowAny]
    serializer_class = CityListSerializer
    filter_backends = (DjangoFilterBackend, SearchFilter)
    filter_class = LocationFilter

    def get_location_list(self, request):
        city_qs = City.objects.all().order_by('name')
        country_qs = Country.objects.all().order_by('name')
        result_qs = list(chain(country_qs, city_qs))

        sorted_list = sorted(result_qs, key=lambda instance: -instance.id)
        results = list()

        for item in sorted_list:
            item_type = item.__class__.__name__.lower()
            if isinstance(item, City):
                serializer = CityLocaliaztionSrl(item)
            if isinstance(item, Country):
                serializer = CountryLocaliaztionSrl(item)
            results.append({'type': item_type, 'data': serializer.data})
        return Response(results, status=200)

并且此过滤器不起作用：

class LocationFilter(FilterSet):
    class Meta:
        model = City
        fields = ('type', 'data__name')

如何在ModelViewSet中使用Django Filters返回序列化数据，希望你们帮助我。