DRF序列化代码

DRF序列化

　　--- 要安装Djangorestframework

　　--- 要使用的时候要在setting中注册app--rest_framework

　　--- 使用之前要定义一个序列化器，指定要序列化的字段

　　下面 是models中的表：

from django.db import models

# Create your models here.

__all__ = ['Book','Publisher','Auth']


class Book(models.Model):
    title = models.CharField(max_length=32)
    CHOICES = ((1,'python'),(2,'linux'),(3,'go'))
    category = models.IntegerField(choices=CHOICES,max_length=32)
    publisher = models.ForeignKey(to='Publisher')
    auth = models.ManyToManyField(to='Auth')

    # def __str__(self):
    #     return self.title

class Publisher(models.Model):
    name = models.CharField(max_length=32)
    def __str__(self):
        return self.name

class Auth(models.Model):
    name = models.CharField(max_length=32)
    def __str__(self):
        return self.name

　　---新建一个py文件当做序列化器

from rest_framework import serializers



class PublisherSerializers(serializers.Serializer):
    id = serializers.IntegerField()
    name = serializers.CharField(max_length=32)

class AuthSerializers(serializers.Serializer):
    id = serializers.IntegerField()
    name = serializers.CharField(max_length=32)

class BookSerializers(serializers.Serializer):
    id = serializers.IntegerField()
    title = serializers.CharField(max_length=32)
    category = serializers.CharField(source='get_category_display')
    publisher = PublisherSerializers()
    auth = AuthSerializers(many=True)

　　manytomany，多对多的外键关系，要指定many=True，这样序列化的时候就会循环序列化每一个对象

　　category = serializers.CharField(source='get_category_display')

　　当有choices字段的时候可以使用source关键字来指定后面 执行的操作，可以跟ORM 操作

　　

---在view文件中使用：

class Book(APIView):
    def get(self,request):
        book_query = models.Book.objects.all()
        print(book_query)
        book_ser = myserializers.BookSerializers(book_query,many=True)
        return Response(book_ser.data)