Examples of CBV and FBV in Django and djangocbvfbv

Examples of CBV and FBV in Django and djangocbvfbv

Preface

This article mainly introduces the CBV and FBV content in Django and shares them for your reference. I will not talk about them much below. Let's take a look at the detailed introduction.

1. CBV

CBV uses an object-oriented method to write view files.

CBV execution process:

The browser sends a request to the server. py matches the url according to the request, finds the View class to be executed, executes the dispatch method to distinguish whether it is a POST request or a GET request, and executes views. the POST method or GET method in The py class.

Instance used:

Urls. py

path('login/',views.Login.as_view())

Views. py

From django import views # add class Login (views. views): def get (self, request) pass def pass (self, request) pass based on Views. py

Use decorator:

from django import viewsfrom django.utils.decorators import method_decoratordef outer(func): def inner(request,*args,**kwargs): return func(request,*args,**kwargs) return innerclass Login(views.View): @method_decorator(outer) def get(self,request,*args,**kwargs): pass

Adding a decorator to a class is a property of adding a decorator to a function. However, the addition method is different.

Eg:

@method_decorator(outer,name='dispatch')class Login(views.View):

Custom dispatch:

class Login(views.View): def dispatch(self, request, *args, **kwargs): print(2222) ret = super(Login, self).dispatch(request, *args, **kwargs) print(1111) return retdef get(self, request, *args, **kwargs):  print('GET')  return HttpResponse('OK')

Execution result: 2222

  GET  1111

Ii. FBV

FBV writes views in the form of functions in views. py.

Check the Code:

Urls. py

from django.conf.urls import url, include# from django.contrib import adminfrom mytest import views urlpatterns = [ # url(r‘^admin/‘, admin.site.urls), url(r‘^index/‘, views.index),]

Views. py

from django.shortcuts import renderdef index(req): if req.method == ‘POST‘: print(‘method is :‘ + req.method) elif req.method == ‘GET‘: print(‘method is :‘ + req.method) return render(req, ‘index.html‘)

Note that the function [def index (req):] is defined here ):]

Index.html

<! DOCTYPE html> 
The above is the use of FBV.
Summary
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