Django的REST框架序列化相關領域

Question

models.py

class Category(models.Model): 
    name = models.CharField(max_length=128) 


class Product(models.Model): 
    category = models.ManyToManyField(Category, related_name="category") 
    name = models.CharField(max_length=128) 


class ProductVariation(models.Model): 
    product = models.ForeignKey(Product, related_name="product") 
    name = models.CharField(max_length=128) 

serializers.py

class ProductVariantSerializer(serializers.HyperlinkedModelSerializer) 
    class Meta: 
     model = ProductVariation 

     fields = (
      "name", 
      ) 

class CategoryDetailSerializer(serializers.Modelserializer): 

    product_variant = PromotionVariantSerializer(many=True) 
    class Meta: 
     model = Category 
     fields =(
      "name", 
      "product_variant" #how can i do this 
      ) 

這裏我要列出所有屬於該類別的產品變型。
我能做些這樣或那樣我想寫的方法來獲取產品變形細節

Answer 1

您可能需要編寫串行的Product和ProductVariation模型。您無法在Category型號串行器中顯示ProductVariation對象，因爲Category和ProductVariation型號之間沒有直接關係。但是您可以嘗試使用Product和ProductVariation型號的單獨嵌套序列化器。

class ProductVariantSerializer(serializers.ModelSerializer): 
    class Meta: 
     model = ProductVariation 
     fields = ("name",) 

class ProductSerializer(serializers.ModelSerializer): 
    variants = ProductVariantSerializer(source='product', many=True, read_only=True) 
    class Meta: 
     model = Product 
     fields = ('name', 'variants') 

class CategorySerializer(serializers.ModelSerializer): 
    products = ProductSerializer(source='category', many=True, read_only=True) 
    class Meta: 
     model = Category 
     fields = ('name', 'products') 

您可以使用CategorySerializer作爲嵌套關係。