嵌套字段与Django REST框架进行序列化 [英] Nesting fields in serialization with Django REST framework

问题描述

鉴于我有一个这样的模型：

  class Case（models.Model）：
打开= models.DateTimeField（auto_now_add = True）
 client_first_name = models.CharField（max_length = 50）
 client_last_name = models.CharField（max_length = 50）
  

我想分组客户端_ * 字段，以便序列化的JSON将如下所示： p>

  {
open：2014-10-05T19：30：48.667Z，
 ：{
first_name：John，
last_name：Doe
} 
} 
  

以下我尝试过，但不起作用，因为客户端不是一个实际的字段：

  class ClientSerializer（serializers.ModelSerializer）：
 
 class Meta：
 model = Case 
 fields =（'client_first_name'，'client_last_name'）
 
 
 class CaseSerializer（serializers.ModelSerializer）：
 client = ClientSerializer（）
 
 class Meta：
 model = Case 
 fields =（'opened'，'client'）
  / pre> 
 
 
除了完全手动序列化，我有什么选择？我不喜欢为客户端制作一个单独的模型，因为这个数据真的属于 Case 。只读不够好。
解决方案
你可以这样尝试：
  class CaseSerializer（serializers.ModelSerializer）：
 client = serializers.SerializerMethodField（'client'）
 
 class Meta：
 model = case 
 fields =（'opened'，'client'）
 
 def client（self，obj）：
 client_fields = {} 
 client_fields ['first_name '] = obj.client_first_name 
 client_fields ['last_name'] = obj.client_last_name 
 return client_fields 
  
 
Given that I have a model like this:
class Case(models.Model):
    opened = models.DateTimeField(auto_now_add=True)
    client_first_name = models.CharField(max_length=50)
    client_last_name = models.CharField(max_length=50)
I would like to group the client_* fields, so that the serialized JSON would look like this:
{
    "opened": "2014-10-05T19:30:48.667Z",
    "client": {
        "first_name": "John",
        "last_name": "Doe"
    }
}
The following I tried, but doesn't work because client is not an actual field:
class ClientSerializer(serializers.ModelSerializer):

    class Meta:
        model = Case
        fields = ('client_first_name', 'client_last_name')


class CaseSerializer(serializers.ModelSerializer):
    client = ClientSerializer()

    class Meta:
        model = Case
        fields = ('opened', 'client')
What options do I have except for completely manual serialization? I prefer not to make a separate model for Client because this data really belongs in Case. Read-only is not good enough.
解决方案
You can try like this:
class CaseSerializer(serializers.ModelSerializer):
    client = serializers.SerializerMethodField('client')

    class Meta:
        model = Case
        fields = ('opened', 'client')

    def client(self, obj):
        client_fields = {}
        client_fields['first_name'] = obj.client_first_name
        client_fields['last_name'] = obj.client_last_name
        return client_fields


                        
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