Question

我试图弄清楚如何设置嵌套的序列化程序。

# 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()

所以我想拥有一个可以创建以下形式的订单的api：

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

我了解到我需要在OrderSerializer内嵌套OrderProductSerializer，但是当“产品”数据使用OrderProduct模型中未找到的字段“ sku”时，如何在此处实现它。我要进行双重嵌套吗？看起来如何？

# serializers.py

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

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

Answer 1

您正试图在反向关系上实现嵌套序列化。因此，您必须通过source参数将关系名称作为参数显式提供给序列化程序。

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__'

有关更多信息，请参考以下文档
1. DRF Nested Relationship
2. DRF-Reverse Realation
3. What is reverse-relationship in Django

如何在Django Rest Framework中设置双嵌套序列化程序

1 个答案: