视图

视图

两种模式： FBV和CBV

视图函数 FBV

　　def index(request):pass

视图类 CBV
　　from django.views import View
　　　　class IndexVIew(View):
　　　　def get(self,request):pass

路由：
　　url(r'^index/',views.IndexView.as_view());

反射： 通过请求方法来反射获取对应的类方法执行

def dispatch(self, request, *args, **kwargs):
　　# Try to dispatch to the right method; if a method doesn't exist,
　　# defer to the error handler. Also defer to the error handler if the
　　# request method isn't on the approved list.
　　# GET--get in http_method_names = ['get', 'post', 'put', 'patch', 'delete', 'head', 'options', 'trace']
　　if request.method.lower() in self.http_method_names:
　　　　handler = getattr(self, request.method.lower(), self.http_method_not_allowed)
　　else:
　　　　handler = self.http_method_not_allowed
　　return handler(request, *args, **kwargs)