装饰器

django中装饰器的使用：

　　首先自定义一个装饰器

def my_decorator(func):
    def inner(*args, **kwargs):
        print('装饰器的功能')
        return func(*args, **kwargs)
    return inner

　　一、基于函数的视图使用装饰器

@my_decorator
def add_student(request):
    return render(request, 'add_student.html')

　　二、基于类的视图使用装饰器

　　　　1.在每个方法前注册装饰器

from django.views import View
from django.utils.decorators import method_decorator


class AddStudent(View):

    @method_decorator(my_decorator)
    def get(self):
        return render(self.request,'add_students.html')

    @method_decorator(my_decorator)
    def post(self):
        name = self.request.POST.get('name')
        pwd = self.request.POST.get('password')
        return redirect('/students/')

　　　　2.在类的前面注册装饰器

from django.views import View
from django.utils.decorators import method_decorator

@method_decorator(my_decorator,name='get')
@method_decorator(my_decorator,name='post')
class AddStudent(View):
    def get(self):
        return render(self.request,'add_students.html')

    def post(self):
        name = self.request.POST.get('name')
        pwd = self.request.POST.get('password')
        return redirect('/students/')