前后端分离的基础

前端一般通过 HTML、CSS、JS、Vue等、来实现
后端一般通过 django 等来实现

• GET：获取数据
• POST：提交数据，创建数据
• PUT：提交数据，更新数据
• DELETe：删除数据

200 服务器请求成功
201 用户新建或修改数据成功
204 用户删除数据成功

400 用户发出的请求错误
401没有权限
403 用户的的授权，但是访问时禁止的
404 用户的请求不存在错误

在settings里面配置

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'myapp',  #子应用
    
    'rest_framework',
]

APIView处理Request，视图的Response及json处理

from django.shortcuts import render
from rest_framework.views import APIView
from rest_framework.response import Response
from myapp.models import People
from myapp.serializers import PeopleSerializer
# Create your views here.
class MyView(APIView):
    def get(self,request):
        print(request.query_params)
        return Response({'msg':'success'},status=200)
    def post(self,request):
        print(request.data)
        return Response({'msg':'success'},status=201)

class PeopleView(APIView):
    # # 查询所有名人信息
    # def get(self,request):
    #     people = People.objects.all()
    #     people_list = []    # 手动完成序列化器
    #     for peo in people:
    #         people_dict = {
    #             'name':peo.name,
    #             'sex':peo.sex,
    #             'money':peo.money,
    #             'ranking':peo.ranking,
    #         }
    #         people_list.append(people_dict)
    #     return Response(people_list,status=200)

    def get(self,request):
        people = People.objects.all()
        # people是序列化的数据,many=True多个数据
        ser = PeopleSerializer(people,many=True)
        # 注意返回的是.data
        return Response(ser.data,status=200)