DRF-序列化组件

知识补充

1 django有自己的序列化组件

class LoginView(APIView):
    parser_classes = [JSONParser]
    def get(self,request):
        course_list = Course.objects.all()
        from django.core.serializers import serialize
        print(course_list)
        data = serialize("json",course_list)
        print('get')
        print(data)
        print(type(data))
        return render(request,'login.html')

2 序列化组件可以参考form组件和modelform组件

3 序列化组件的校验功能：serializer.is_valid()

4 序列化组件展示错误信息：serializer.errors

普通版

from django.shortcuts import render,HttpResponse

from django.views import View
# Create your views here.
# 导入djangorestframework
# 当前访问视图类下设置解析方式
from rest_framework.parsers import JSONParser
from rest_framework.views import APIView
from app01.models import *
from rest_framework import serializers
from rest_framework.response import Response

class BookSerializer(serializers.Serializer):
　　 # 普通字段　
    title = serializers.CharField(max_length=32)
    price = serializers.DecimalField(max_digits=5,decimal_places=2)
    # 一对多字段
    publish_email = serializers.CharField(max_length=32,source="publish.email")
    publish_name = serializers.CharField(max_length=32,source="publish.name")
    # 多对多字段
    # authors = serializers.CharField(max_length=32,source='authors.all')
    authors = serializers.SerializerMethodField()
    def get_authors(self,obj):
        ret=[]
        for i in obj.authors.all():
            ret.append(i.name)
        return ret
class LoginView(APIView):
    parser_classes = [JSONParser]

    def get(self,request):

        book_list = Book.objects.all()
        serializer = BookSerializer(book_list,many=True)
        return Response(serializer.data)

        # return render(request,'login.html')
    def post(self,request):

        print('body',request.body)
        print(request.data)
        print('data',request.data)

        # print('POST', request.POST)
        return HttpResponse('OK')

注：普通版的保存数据不能使用 serializer.save()

ModelSerializer

class BookSerializer(serializers.ModelSerializer):
    class Meta:
        model=Book
        # fields=["title","price"]
        fields="__all__"

    # publish=serializers.CharField(max_length=32,source="publish.name")
    #
    # authors=serializers.SerializerMethodField()
    # def get_authors(self,obj):
    #     ret=[]
    #     for i in obj.authors.all():
    #         ret.append({"name":i.name,"pk":i.pk})
    #     return ret



class BookView(APIView):

    def get(self,request):
        book_list=Book.objects.all()
        serializer=BookSerializer(book_list,many=True)
        return Response(serializer.data)


    def post(self,request):
        serializer=BookSerializer(data=request.data,many=False)

        if serializer.is_valid():
            serializer.save() # create操作

            return Response(serializer.data)
        else:
            return Response(serializer.errors)