如何在django rest框架中將相關字段包含到模型序列化中？

Question

我有兩個型號：

class User(models.Model): 
    username = models.CharField() 

和

class Post(models.Model): 
    text = models.TextField() 
    owner = models.ForeignKey(User) 

使用這種串行：

from rest_framework.serializers import ModelSerializer 

class PostSerializer(ModelSerializer): 
    owner = serializers.Field(source='owner.id') 

    class Meta: 
     model = Post 
     fields = ['text', 'owner'] 

我得到業主的ID的所有帖子。如何修改序列化程序以獲取包含所有用戶模型的擁有者的所有帖子？

我tryied 從rest_framework.serializers導入ModelSerializer

class PostSerializer(ModelSerializer): 
    owner = serializers.Field(source='owner') 

    class Meta: 
     model = Post 
     fields = ['text', 'owner'] 

但僅替換用戶名ID，而不是如我所料，型號全（因爲用戶表示將返回用戶名字段）。

Answer 1

的解決方案是定義UserSerializer延伸ModelSerializer那樣

from rest_framework.serializers import ModelSerializer 

class UserSerializer(ModelSerializer): 

    class Meta: 
     model = UserModel 
     fields = ['id', 'username'] 

，然後在PostSerializer使用它：

from myapp import UserSerializer 
from rest_framework.serializers import ModelSerializer 

class PostSerializer(ModelSerializer): 
    owner = UserSerializer() 

    class Meta: 
     model = PostModel 
     fields = ['id', 'owner'] 

Answer 2

使用您ModelSerializer的Meta類中depth選項：

class PostSerializer(ModelSerializer): 

    class Meta: 
     model = Post 
     fields = ['text', 'owner'] 
     depth = 1 

還要注意的是，你並不需要包括Author領域。

Docs here。