Remove color in post model, optimize queryset

market/admin.py

@@ -13,7 +13,6 @@ admin.site.register(Image)
 class PostAdmin(admin.ModelAdmin):
     list_display = (
         "product",
-        "color",
         "storage",
         "price",
         "text",

market/models.py

@@ -43,7 +43,6 @@ class Post(models.Model):
     product = models.ForeignKey(
         Product, on_delete=models.CASCADE, related_name="posts"
     )
-    color = models.CharField(max_length=20)
     storage = models.ForeignKey(ProductStorage, on_delete=models.CASCADE)
     price = models.IntegerField()
     text = models.TextField()

market/serializers.py

@@ -4,38 +4,38 @@ from rest_framework.serializers import ModelSerializer
 from market.models import (
     Brand,
     Product,
-    ProductStorage,
     Post,
     Image,
 )
 
 
-class BrandSerializer(ModelSerializer):
-    class Meta:
-        model = Brand
-        fields = "__all__"
-
-
-class ProductStorageSerializer(ModelSerializer):
-    class Meta:
-        model = ProductStorage
-        fields = ("storage",)
-
-
 class ProductSerializer(ModelSerializer):
-    storage = ProductStorageSerializer(many=True, read_only=True)
+    storage = serializers.StringRelatedField(many=True)
 
     class Meta:
         model = Product
         fields = ("id", "name", "brand", "storage")
+        depth = 1
 
 
 class ProductListSerializer(ModelSerializer):
-    brand = serializers.CharField(source="brand.name")
-
     class Meta:
         model = Product
-        fields = ("id", "name", "brand")
+        fields = ("id", "name")
+
+
+class BrandSerializer(ModelSerializer):
+    products = ProductListSerializer(many=True, read_only=True)
+
+    class Meta:
+        model = Brand
+        fields = ["id", "name", "products"]
+
+
+class BrandListSerializer(ModelSerializer):
+    class Meta:
+        model = Brand
+        fields = "__all__"
 
 
 class ImageSerializer(ModelSerializer):
@@ -48,15 +48,14 @@ class PostSerializer(ModelSerializer):
     product = ProductListSerializer(read_only=True)
     nickname = serializers.CharField(source="author.nickname")
     images = ImageSerializer(many=True, read_only=True)
-    # storage = serializers.CharField(source="storage.storage")
+    storage = serializers.CharField(source="storage.storage")
 
     class Meta:
         model = Post
         fields = (
             "id",
             "product",
-            "color",
+            "storage",
-            "storage__storage",
             "price",
             "text",
             "nickname",

market/viewsets.py

@@ -30,7 +30,11 @@ class BrandViewset(ActionBasedMixin, ModelViewSet):
 
 
 class ProductViewset(ActionBasedMixin, ModelViewSet):
-    queryset = Product.objects.all()
+    queryset = (
+        Product.objects.all()
+        .select_related("brand")
+        .prefetch_related("storage")
+    )
     serializer_class = ProductSerializer
     serializer_class_map = {
         "posts": PostSerializer,
@@ -52,11 +56,10 @@ class ProductViewset(ActionBasedMixin, ModelViewSet):
 
 
 class PostViewset(ActionBasedMixin, ModelViewSet):
-    queryset = Post.objects.all().select_related(
+    queryset = (
-        "storage",
+        Post.objects.all()
-        "product",
+        .select_related("storage", "product", "author", "product__brand")
-        "author",
+        .prefetch_related("images")
-        "product__brand",
     )
     serializer_class = PostSerializer
     permission_classes = [IsAuthenticated, IsAuthorOrReadOnly]