如何在Django Rest框架中设置双嵌套序列化程序

我正试图找出如何设置嵌套序列化程序

# models.py

class Product(models.Model):
    sku = models.CharField()
    product_name = models.CharField()

class Order(models.Model):
    name = models.CharField()
    address = models.CharField()

class OrderProduct(models.Model):
    order = models.ForeignKey( Order )
    product = models.ForeignKey( Product )
    quantity = models.IntegerField()

因此，我希望有一个api，可以创建以下形式的订单：

{
  "name" : "James",
  "address" : "100 Main St",
  "products" : [
              { "sku" : "1234", "quantity" : 1 }
            ]
}

我知道我需要OrderSerializer中的nest OrderProductSerializer，但是当“产品”数据使用OrderProduct模型中找不到的字段“sku”时，我如何在这里实现它。我做双重嵌套吗？看起来怎么样

# serializers.py

class OrderProductSerializer( serializers.ModelSerializer):
    class Meta:
        model = OrderProduct
        exclude = ()

class OrderSerializer(serializers.ModelSerializer):
    products = OrderProductsSerializer(many=True)
    class Meta:
        model = Order
        exclude = ()

---

您正试图在反向关系上实现嵌套序列化。因此，必须通过

source

参数显式地将关系名称作为参数提供给序列化程序

试试这个

class OrderProductSerializer(serializers.ModelSerializer):
    class Meta:
        model = OrderProduct
        fields = '__all__'


class OrderSerializer(serializers.ModelSerializer):
    product = OrderProductSerializer(many=True, source='product_set')

    class Meta:
        model = Order
        fields = '__all__'

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