Diango路由映射FBV和CBV
django中请求处理方式有2种:FBV(function base views) 和 CBV(class base views),换言之就是一种用函数处理请求,一种用类处理请求。
FBV
# url.py from django.conf.urls import url, include from mytest import views urlpatterns = [ url(r‘^index/‘, views.index), ] # views.py from django.shortcuts import render def 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‘)
CBV
# urls.py from mytest import views urlpatterns = [ # url(r‘^index/‘, views.index), url(r‘^index/‘, views.Index.as_view()), ] # views.py from django.views import View class Index(View): def get(self, req): print(‘method is :‘ + req.method) return render(req, ‘index.html‘) def post(self, req): print(‘method is :‘ + req.method) return render(req, ‘index.html‘) # 注:类要继承 View ,类中函数名必须小写。
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# cbv 模式下继承了django的view类 # 在请求来临的时候,会调用继承类的 dispatch 方法 # 通过反射的方法它会去调用自己写的视图函数, 那么这便是一个切入点,可以在自己的 cbv 视图中,重写这个方法。 class View(object): 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. 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)
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