寫一個裝飾器

import time


def timer(fn):
def inner(*args, **kwargs):
start = time.time()
ret = fn(*args, **kwargs)
print("函式執行時間是{}".format(time.time() - start))

return ret

return inner

FBV

# 添加出版社的處理函式
@timer
def add_press(request):
if request.method == 'POST':
# 表示使用者填寫完了，要給我發資料
# 1. 取到使用者填寫的出版社資料
press_name 
 
= request.POST.get('name')
# 2. 將資料新增到資料庫中
Press.objects.create(name=press_name)
# 3. 跳轉到出版社列表頁面
return redirect('/press_list/')

# 1. 返回一個新增頁面，讓使用者在上面填寫新的出版社的資訊
return render(request, 'add_press2.html')

CBV

from django.views import View

from django.utils.decorators import method_decorator


# @method_decorator(timer,name
 
='post')
# @method_decorator(timer,name='get')
class AddPress(View):
# http_method_names = ['get','post']

@method_decorator(timer)
def dispatch(self, request, *args, **kwargs):
print('執行之前')
ret = super().dispatch(request, *args, **kwargs)
print('執行之後')
return ret

# @method_decorator(timer)
def get
 
(self, request):
print('get')
print(self.request)
return render(self.request, 'add_press2.html')

# @method_decorator(timer)
def post(self, request):
print('post')
press_name = request.POST.get('name')
Press.objects.create(name=press_name)
return redirect('/press_list/')