Class view flask

Advantage classes view

类视图的好处是支持继承，但是类视图不能跟函数视图一样，
写完类视图还需要通过app.add_url_rule(url_rule,view_func)来进行注册

from flask import Flask,render_template,views

app = Flask(__name__,)

Decorator

- Class view decorator, decorators need to rebuild the class attribute class view, he is a list, which is filled with all the decorators
- If you are using a function of view, the definition of decorators must be placed app.route below, otherwise not have any effect

def test1(func):
    def inner(*args,**kwargs):
        print('before1')
        result = func(*args,**kwargs)
        print('after1')
        return result
    return inner

def test2(func):
    def inner(*args,**kwargs):
        print('before2')
        result = func(*args,**kwargs)
        print('after2')
        return result
    return inner

Class View

class UserView(views.MethodView):
    methods = ['GET',"POST"]

    decorators = [test1,test2] # 装饰器列表


    def get(self):
        print('get')
        return 'get'

    def post(self):
        print('post')
        return 'post'

app.add_url_rule('/user', view_func=UserView.as_view('user')) # endpoint

if __name__ == '__main__':
    app.run()