impfix N+1 problem

mate-academy · Dec 11, 2024 · cbe7c21 · cbe7c21
1 parent d12f7f8
commit cbe7c21
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Showing 2 changed files with 3 additions and 2 deletions.
diff --git a/cinema/serializers.py b/cinema/serializers.py
@@ -129,6 +129,7 @@ class Meta:
             "cinema_hall",
             "movie",
         )
+        read_only_fields = ("id",)
 
 
 class MovieSessionDetailSerializer(serializers.ModelSerializer):

diff --git a/cinema/views.py b/cinema/views.py
@@ -34,7 +34,7 @@ class CinemaHallViewSet(viewsets.ModelViewSet):
 
 
 class MovieViewSet(viewsets.ModelViewSet):
-    queryset = Movie.objects.all()
+    queryset = Movie.objects.prefetch_related()
 
     def get_serializer_class(self):
         if self.action == "list":
@@ -45,7 +45,7 @@ def get_serializer_class(self):
 
 
 class MovieSessionViewSet(viewsets.ModelViewSet):
-    queryset = MovieSession.objects.all()
+    queryset = MovieSession.objects.select_related("movie", "cinema_hall")
 
     def get_serializer_class(self):
         if self.action == "retrieve":