django补充CBV和FBV模式

django补充CBV和FBV模式
FBV模式---函数:经常用的方式
CBV模式---类
CBV中url连接时函数名后面要接.as_view()
class index（views.View）：
 @...
 def dispath(self,request,*arg,**kwarg):
 super...
如果对某一种请求做处理：单一装饰器
如果对请求做处理：dispatch单一装饰器
注：CBV模式中的装饰器要调用method_decorator
from django.utils.decorators import method_decorator
在执行后台程序分辨get和post传值之前要先执行调用的view函数中的dispatch方法进行处理
例：
from django import views
from django.utils.decorators import method_decorator
def outer(func):
 def inner(request,*args,**kwargs):
 print(request.method)
 return func(request,*args,**kwargs)
 return inner #闭包
class Login(views.View):
 message = ''
 #分发器
 def dispatch(self, request, *args, **kwargs):
 print("eric")
 req = super(Login,self).dispatch(request,*args,**kwargs)
 print("ericc")
 return req
 @method_decorator(outer)
 def get(self,request,*args,**kwargs):
 return render(request,"login.html")

 @method_decorator(outer)
 def post(self,request,*args,**kwargs):
 user = request.POST.get("user")
 pwd = request.POST.get("pwd")
 c=1#数据库取值对照
 if c:
 request.session["is_login"] = True
 request.session["username"] = user
 req=redirect("/login/")
 return req
 else:
 message = "用户名或密码错误"
 return render(request,"login.html",{"msg":message})