q1 = parent.objects.filter(chile_1__isnull=True).filter(chile_1__name='blog').values('chile_1__id').extra(select = {"id":"chile_1__id"})

    q2 = parent.objects.filter(chile_2__isnull=True).filter(chile_2__name='blog1').values('chile_2__id').extra(select = {"id":"chile_2__id"})

q3 =  q1 | q2

class MyCustomSerializer(serializers.Serializer):
        object_pk = serializers.IntegerField(source='pk')
        name = serializers.CharField()
        goloc = serializers.CharField(source='get_geoloc')

    class MyCustomViewset(viewsets.ModelViewSet):
        serializer_class = MyCustomSerializer
        def list(self, request):
            mylist = []
            # q1 and q2 querysets need still to be fetched...
            for o in q1:
                mylist.append(o)
            for o in q2:
                mylist.append(o)
            queryset = mylist
            serializer = MyCustomSerializer(queryset, many=True)
            return Response(serializer.data)