update

rog/views.py

@@ -174,6 +174,18 @@ def CatView(request):
     return JsonResponse(serializer.data, safe=False)
 
 
+def CatByCity(request):
+    city = request.GET.get('city')
+    if(city != None):
+        cilt_polygon = JpnSubPerf.objects.filter(adm1_ja=city)
+        cats = Location.objects.filter(geom__within=cilt_polygon[0].geom).values('category').distinct()
+        serializer = LocationCatSerializer(cats, many=True)
+        return JsonResponse(serializer.data, safe=False)
+    else:
+        return null
+
+
+
 class RegistrationAPI(generics.GenericAPIView):
     serializer_class = CreateUserSerializer