一.CBV和FBV
FBV function base views 用函数方法来处理请求
from django.http import HttpResponse
def my_view(request):
if request.method == 'GET':
return HttpResponse('OK')
CBV class base views 用类来处理请求(面向对象)
from django.http import HttpResponse
from django.views import View
class MyView(View):
def get(self, request):
return HttpResponse('OK')
CBV class base views 用类来处理请求(面向对象)
from django.http import HttpResponse
from django.views import View
class MyView(View):
def get(self, request):
return HttpResponse('OK')
二.给视图函数加装饰器
写一个装饰器:
def wrapper(func):
def inner(*args, **kwargs):
start_time = time.time()
ret = func(*args, **kwargs)
end_time = time.time()
print("used:", end_time-start_time)
return ret
return inner
1.使用装饰器装饰FBV
#添加班级
@wrapper
def add_class(request):
if request.method == "POST":
class_name = request.POST.get("class_name")
models.Classes.objects.create(name=class_name)
return redirect("/class_list/")
return render(request, "add_class.html")
2.使用装饰器装饰CBV
from django.views import View
from django.utils.decorators import method_decorator
class AddClass(View):
@method_decorator(wrapper)
def get(self, request):
return render(request, "add_class.html")
def post(self, request):
class_name = request.POST.get("class_name")
return redirect("/class_list/")
3.dispatch()
请求过来之后会先执行dispatch()方法,如果需要批量对具体的请求处理方法.如get,post等做一些操作的时候,可以手动改写dispatch方法,这个dispatch方法就和在FBV上加装饰器一样
class Login(View):
def dispatch(self, request, *args, **kwargs):
print('before')
obj = super(Login,self).dispatch(request, *args, **kwargs)
print('after')
return obj
def get(self,request):
return render(request,'login.html')
def post(self,request):
print(request.POST.get('user'))
return HttpResponse('Login.post')