Question

我有两种模式：

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

和

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

使用这样的序列化器：

from rest_framework.serializers import ModelSerializer

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

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

我收到了所有者ID的所有帖子。如何修改序列化程序以获取包含整个用户模型的所有者fialed的所有帖子？

我试过了来自rest_framework.serializers导入ModelSerializer

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

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

但是只用id替换了id，而不是我预期的整个模型（因为User的表示返回了username字段）。

Answer 1

解决方案是定义UserSerializer，像那样扩展ModelSerializer

from rest_framework.serializers import ModelSerializer

class UserSerializer(ModelSerializer):

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

然后在PostSerializer中使用它：

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depth ModelSerializer课程中的Meta选项：

class PostSerializer(ModelSerializer):

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

另请注意，您不需要包含Author字段。

文档here。

如何在django rest框架中包含相关字段到模型序列化？

2 个答案: