修改，删除接口

from django.shortcuts import render
from django.http import HttpResponse

# Create your views here.
from rest_framework.views import APIView
from rest_framework.response import Response
from app01 import models
# from app01.serializer import BookModelSerializer as BookSerializer
from app01.serializer import BookModelSerializer
from app01.serializer import BookSerializer
'''5个接口
1 查询所有   Book--》get
2 查询单个   BookDetali--》get
3 新增一个   Book--》post
4 删除一个   BookDetali--》delete
5 修改一个   BookDetali--》put   向地址books/1发送put请求
'''

def put(self, request, id):
        # 通过id取到对象
        res = {'code': 100, 'msg': ''}
        try:
            book = models.Book.objects.get(id=id)
            ser = BookSerializer(instance=book, data=request.data)
            ser.is_valid(raise_exception=True)
            ser.save()
            res['msg'] = '修改成功'
            res['result'] = ser.data

        except Exception as e:
            res['code'] = 101
            res['msg'] = str(e)

        return Response(res)
    def delete(self,request,id):
        response = {'code': 100, 'msg': '删除成功'}
        models.Book.objects.filter(id=id).delete()
        return Response(response)

# 序列化器类（序列化Book表）
# from rest_framework.serializers import Serializer
from rest_framework import serializers
from rest_framework.exceptions import ValidationError
from app01 import models

class BookSerializer(serializers.Serializer):
    id = serializers.IntegerField(required=False)
    title = serializers.CharField(max_length=32,min_length=2)
    price = serializers.DecimalField(max_digits=5, decimal_places=2)
    publish = serializers.CharField(max_length=32)

    def create(self, validated_data):
        res=models.Book.objects.create(**validated_data)
        print(res)
        return res

    def update(self, book, validated_data):
        book.title=validated_data.get('title')
        book.price=validated_data.get('price')
        book.publish=validated_data.get('publish')
        book.save()
        return book