fix view

apps/location/views/back.py

@@ -2,6 +2,7 @@
 from django.contrib.postgres.fields.jsonb import KeyTextTransform
 from rest_framework import generics, status
 from rest_framework.response import Response
+from rest_framework.views import APIView
 
 from location import filters
 from location import models, serializers
@@ -131,7 +132,7 @@ class CountryRUDView(CountryBaseViewMixin, generics.RetrieveUpdateDestroyAPIView
     serializer_class = serializers.CountryBackSerializer
 
 
-class CountryCallingCodeListView(generics.GenericAPIView):
+class CountryCallingCodeListView(APIView):
     """
     ## Country codes view.
     ### Response
@@ -166,6 +167,5 @@ class CountryCallingCodeListView(generics.GenericAPIView):
         ### Description
         Return an array of unique country code for all countries in a database.
         """
-        return Response(models.Country.objects.only('calling_code')
-                                      .aggregate_country_codes(),
+        return Response(data=models.Country.objects.aggregate_country_codes(),
                         status=status.HTTP_200_OK)