ingredient related recipes performance

cookbook/serializer.py

@@ -627,7 +627,11 @@ class IngredientSimpleSerializer(WritableNestedModelSerializer):
     nutritions = serializers.SerializerMethodField('get_nutritions')
 
     def get_used_in_recipes(self, obj):
-        return list(Recipe.objects.filter(steps__ingredients=obj.id).values('id', 'name'))
+        used_in = []
+        for s in obj.step_set.all():
+            for r in s.recipe_set.all():
+                used_in.append({'id':r.id,'name':r.name})
+        return used_in
 
     def get_conversions(self, obj):
         conversions = []

cookbook/views/api.py

@@ -797,7 +797,10 @@ class RecipeViewSet(viewsets.ModelViewSet):
         if self.detail:  # if detail request and not list, private condition is verified by permission class
             if not share:  # filter for space only if not shared
                 self.queryset = self.queryset.filter(space=self.request.space).prefetch_related('steps', 'keywords',
-                                                                                                'shared', 'steps__ingredients',
+                                                                                                'shared',
+                                                                                                'steps__ingredients',
+                                                                                                'steps__ingredients__step_set',
+                                                                                                'steps__ingredients__step_set__recipe_set',
                                                                                                 'steps__ingredients__food',
                                                                                                 'steps__ingredients__food__inherit_fields',
                                                                                                 'steps__ingredients__food__supermarket_category',