Fix multiple tokens issue

api/views.py

@@ -252,21 +252,16 @@ class DeviceTokenViewSet(viewsets.ModelViewSet):
             return self.queryset.filter(user=self.request.user)
         return []
 
-    # def create(self, request, *args, **kwargs):
+    def create(self, request, *args, **kwargs):
-    #     value = request.data.get('value')
+        value = request.data.get('value')
-    #     if DeviceToken.objects.filter(value=value).exists():
+        if DeviceToken.objects.filter(value=value).exists():
-    #         return Response({"detail": "This device token is already registered."}, status=208)
+            return Response({"detail": "This device token is already registered."}, status=208)
-
+
-    #     print('a')
+        serializer = self.get_serializer(data=request.data)
-    #     serializer = self.get_serializer(data=request.data)
+        serializer.is_valid(raise_exception=True)
-    #     print('b')
+        self.perform_create(serializer)
-    #     # serializer.is_valid(raise_exception=True)
+        headers = self.get_success_headers(serializer.data)
-    #     print('c')
+        return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
-    #     self.perform_create(serializer)
-    #     print('d')
-    #     headers = self.get_success_headers(serializer.data)
-    #     return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
 
     def perform_create(self, serializer):
-        # serializer.is_valid(raise_exception=True)
         serializer.save(user=self.request.user)