序列化组件

一  Serialiaer

1.重命名

class BooksSerializer(serializers.Serializer):
    # 第一种序列化方式
    name = serializers.CharField()
    xxx = serializers.CharField(source='price')

2.取出出版社名字

• 方式一
  • 在模型表中重写__str__方法

序列化组将

class BooksSerializer(serializers.Serializer):
    publish = serializers.CharField()

模型表

class Publish(models.Model):
    nid = models.AutoField(primary_key=True)
    name = models.CharField(max_length=32)
    city = models.CharField(max_length=32)
    email = models.EmailField()

    def __str__(self):
        return self.name

• 方式二
  • 用source,拿出出版社城市

组件

class BooksSerializer(serializers.Serializer):
    publish = serializers.CharField(source='publish.city')

sourse不仅可以指定字段,还可以指定方法

组件

class BooksSerializer(serializers.Serializer):
    city = serializers.CharField(source='publish.test')

模型表

class Publish(models.Model):
    nid = models.AutoField(primary_key=True)
    name = models.CharField(max_length=32)
    city = models.CharField(max_length=32)
    email = models.EmailField()

    def test(self):
        return self.city

3.SerializerMethodField,可以指定一个方法

组将

class BooksSerializer(serializers.Serializer):
    publish = serializers.SerializerMethodField()

    def get_publish(self, obj):
        # obj是当前book对象
        dic = {'name': obj.publish.email, 'email': obj.publish.name, 'addr': obj.publish.city}
        return dic

方法内部可以继续用其他的序列化类

from rest_framework import serializers

class AuthorSerializer(serializers.Serializer):
    nid = serializers.CharField()
    name = serializers.CharField()
    age = serializers.CharField()


class BooksSerializer(serializers.Serializer):
    authors = serializers.SerializerMethodField()

    def get_authors(self, book):
       author = book.authors.all()
       # 方法内部还可以继续用其他的序列化类
       auther_ser = AuthorSerializer(author,many=True)
       return auther_ser.data

二  ModelSerialiaer

from app01.models import Book

class BooksSerializer(serializers.ModelSerializer):
    class Meta:
        # model=指定表
        model = Book
        # fields = '__all__'
        # 指定只取这两个字段
        # fields = ['nid', 'name']
        # fields,跟exclude不能连用
        # 指定深度,就是跨几个表(官方建议小于10,我给你的建议小于3)
        exclude = ['publish', 'authors']
        depth = 1