feat: 평균 별점 추가

restaurants/serializers.py

@@ -5,16 +5,14 @@
 
 
 class RestaurantSerializer(serializers.ModelSerializer):
-    reviews = serializers.SerializerMethodField()
+    rating_average = serializers.SerializerMethodField()
 
     class Meta:
         model = Restaurant
         fields = "__all__"
 
-    def get_reviews(self, obj):
-        reviews = obj.reviews.order_by("-recommend_count")[:4]
-        serializer = ReviewSerializer(reviews, many=True)
-        return serializer.data
+    def get_rating_average(self, obj):
+        return obj.rating_average()
 
 
 class RestaurantListSerializer(serializers.ModelSerializer):
@@ -44,3 +42,20 @@ class UserRestaurantListSerializer(serializers.ModelSerializer):
     class Meta:
         model = UserRestaurantsList
         fields = "__all__"
+
+
+class RestaurantDetailSerializer(serializers.ModelSerializer):
+    reviews = serializers.SerializerMethodField()
+    rating_average = serializers.SerializerMethodField()
+
+    class Meta:
+        model = Restaurant
+        fields = "__all__"
+
+    def get_reviews(self, obj):
+        reviews = obj.reviews.order_by("-recommend_count")[:4]
+        serializer = ReviewSerializer(reviews, many=True)
+        return serializer.data
+
+    def get_rating_average(self, obj):
+        return obj.rating_average()

restaurants/views.py

@@ -8,6 +8,7 @@
     RestaurantListSerializer,
     SearchHistorySerializer,
     UserRestaurantListSerializer,
+    RestaurantDetailSerializer,
 )
 
 # from django.contrib.auth.decorators import login_required
@@ -108,7 +109,7 @@ def add_remove_restaurant(request, pk):
 def restaurant_detail(request, pk):
     try:
         restaurant = Restaurant.objects.prefetch_related("reviews").get(pk=pk)
-        serializer = RestaurantSerializer(restaurant)
+        serializer = RestaurantDetailSerializer(restaurant)
         return Response(serializer.data)
     except Restaurant.DoesNotExist:
         return Response(