FBV/CBV

CBV、FBV　　

基于反射实现根据请求方式不同，执行不同的方法
原理看源码：url->view->dispatch(反射执行其他：['get', 'post', 'put', 'patch', 'delete', 'head', 'options', 'trace'])

from django.shortcuts import render, HttpResponse
from django.views import View
from django.views.decorators.csrf import csrf_exempt


@csrf_exempt
def userinfo(request):
    import json
    user_list = ['悟空', '三藏']
    return HttpResponse(json.dumps(user_list))

from django.utils.decorators import method_decorator


class MybaseView(object):

    def dispatch(self, request, *args, **kwargs):
        print('before')
        ret = super(MybaseView, self).dispatch(request, *args, **kwargs)
        print('after')
        return ret


@method_decorator(csrf_exempt, name='dispatch')
class StudentView(MybaseView, View):

    def get(self, request, *args, **kwargs):
        print('get')
        return HttpResponse('GET')

    def post(self, request, *args, **kwargs):
        return HttpResponse('POST')

    def put(self, request, *args, **kwargs):
        return HttpResponse('PUT')

    def delete(self, request, *args, **kwargs):
        return HttpResponse('DELTEE')


@method_decorator(csrf_exempt, name='dispatch')
class TeacherView(MybaseView, View):

    def get(self, request, *args, **kwargs):
        return HttpResponse('GET')

    def post(self, request, *args, **kwargs):
        return HttpResponse('POST')

    def put(self, request, *args, **kwargs):
        return HttpResponse('PUT')

    def delete(self, request, *args, **kwargs):
        return HttpResponse('DELTEE')

我这样继承可以相当于给类里边的方法加上装饰器的效果

执行流程图：