Django Rest框架，外键字段的默认序列化程序

Question

假设用户的地址是外键。

一个典型的PrimaryKeyRelatedField将用id表示外键：

{

   id: 3,
   first_name: eugene,
   last_name: kim,
   address: 9  # here 9 is address's id
}

我想更改已更改的外键字段的默认表示形式，如下例所示。(希望没有我为每个外键字段定义序列化程序)

{
   id: 3,
   first_name: eugene,
   last_name: kim,
   address: {
     id: 9     # difference here,
   }
}   

Answer 1

尝尝这个

class MyPrimaryKeyRelatedField(PrimaryKeyRelatedField)

    def to_representation(self, value):
        if self.pk_field is not None:
            return self.pk_field.to_representation(value.pk)
        return {"id": value.pk}

更新

class MyModelSerializer(serializers.ModelSerializer)
    serializer_related_field = MyPrimaryKeyRelatedField

然后将PrimaryKeyRelatedField替换为MyPrimaryKeyRelatedField，将serializers.ModelSerializer替换为MyModelSerializer