добавил параметр is_favorite

server/proj/audio/views.py

@@ -23,11 +23,14 @@ class SongViewSet(ViewSet):
             data = {
                 "song": song[0].id, 
                 "user": request.user.pk
+                
             } 
             serializer_1 = FavoriteSongSerializer(data=data)
             if serializer_1.is_valid():
                 serializer_1.save()
-                return Response(serializer_1.data, status=status.HTTP_201_CREATED)
+                resp = serializer_1.data
+                resp.update(is_favorite=True)
+                return Response(resp, status=status.HTTP_201_CREATED)
             else:
                 return Response(serializer_1.errors, status=status.HTTP_400_BAD_REQUEST)
         else: