исправил отображение объекта музыки

server/proj/audio/serializers.py

@@ -10,3 +10,10 @@ class FavoriteSongSerializer(serializers.ModelSerializer):
     class Meta:
         model = FavoriteSong    
         fields = ('id', 'song', 'user')
+
+    def to_representation(self, instance):
+        rep = super().to_representation(instance)
+        rep["song"] = SongSerializer(
+            instance.song).data
+        return rep
+        

server/proj/audio/views.py

@@ -44,9 +44,18 @@ class SongViewSet(ViewSet):
 
             if serializer.is_valid():
                 serializer.save()
-                return Response(serializer.data, status=status.HTTP_201_CREATED)
+            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)
             else:
-                return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+                return Response(serializer_1.errors, status=status.HTTP_400_BAD_REQUEST)
+                
         
     
     @action(detail=False, methods=['post'], schema=DeleteSongSchema())