try to fix subscriptions #2

apps/notification/views/common.py

@@ -17,12 +17,11 @@ class CreateSubscribeView(generics.CreateAPIView):
 
     def create(self, request, *args, **kwargs):
         data = request.data
+        instance = None
         if 'email' in request.data:
             # we shouldn't create new subscriber if we have one
-            subscriber = models.Subscriber.objects.filter(email=request.data['email']).first()
-            if subscriber:
-                data = subscriber  # new serializer will simply update instance instead of creating another one
-        serializer = self.get_serializer(data=data)
+            instance = models.Subscriber.objects.filter(email=request.data['email']).first()
+        serializer = self.get_serializer(data=data) if instance is None else self.get_serializer(instance, data=data)
         serializer.is_valid(raise_exception=True)
         self.perform_create(serializer)
         headers = self.get_success_headers(serializer.data)