python - Django Rest - 在 get_*** 方法中包含序列化器对象

Question

我试图将相关模型的序列化对象包含在另一个序列化程序的自定义对象中，但我不知道如何执行此操作。

我有两个模型 - 代码片段和用户。片段模型具有用户的外键。我需要的是将代码片段的序列化对象包含在 UserSerializer 的“get_included”方法中，并使 UserSerializer 返回一个 JSON 对象，如下所示:

{
   "id" : 1,
   "included": [
      {'id': 2,'created': "20150729" },
      {'id': 3,'created': "20150730" }, 
   ]
}

下面是我的代码。

# Snippet Model
from django.db import models
class Snippet(models.Model):
   created = models.DateTimeField(auto_now_add=True)
   user = models.ForeignKey('auth.User', related_name='snippets')

# Snippet serializer
class SnippetSerializer(serializers.ModelSerializer):
   model = Snippet
   fields = ('id','created')

# User serializer
from .serializers import SnippetSerializer
class UserSerializer(serializers.ModelSerializer):
  included = serializers.SerilizerMethodField()
  class Meta: 
     model = User
     depth = 1 
     fields = ('id','included')

  def get_included(self, obj):
     snippets = SnippetSerializer(many=True, read_only=True).data

     return snippets

Answer 1

不需要 get_included 方法。只需将 snippets 属性添加到类中即可。

class UserSerializer(serializers.ModelSerializer):
    included = SnippetSerializer(many=True, read_only=True)

    class Meta: 
        model = User
        depth = 1 
        fields = ('id','included')