[英]Django: 'User' object has no attribute 'user'
我的網站有一個警報系統。 發生某種操作時,系統會在以下模型中記錄警報:
class Alert(models.Model):
title = models.CharField(max_length=60)
read = models.BooleanField #if this is a new alert of not
for_user = models.ForeignKey(User) #which user will see it
link = models.CharField(max_length=100)
許多功能需要檢查用戶的警報數量(主要是顯示站點警報選項卡旁邊的新警報數)。 因此,我創建了這個函數:
@login_required()
def get_alertnum(user):
alert_objects = Alert.objects.filter(read = False, for_user=user)
num = 0
for n in alert_objects:
num += 1
return num
這個功能可以訪問:
@login_required()
def posting_draft(request):
user = request.user
user_drafts = Draft.objects.filter(user = user)
drafts = dict()
for d in user_drafts:
drafts[d.title] = d.id
alertnum = get_alertnum(user)
return render_to_response('posting_draft.html', {'STATIC_URL':STATIC_URL, 'draft_l' : drafts, 'selected':"dr", alertnum: alertnum})
但是我收到以下錯誤:
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/posting/drafts
Django Version: 1.4
Python Version: 2.7.3
Installed Applications:
('django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.messages',
'django.contrib.staticfiles',
'Knights',
'django.contrib.admin')
Installed Middleware:
('django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware')
Traceback:
File "/Library/Python/2.7/site-packages/Django-1.4-py2.7.egg/django/core/handlers/base.py" in get_response
111. response = callback(request, *callback_args, **callback_kwargs)
File "/Library/Python/2.7/site-packages/Django-1.4-py2.7.egg/django/contrib/auth/decorators.py" in _wrapped_view
20. return view_func(request, *args, **kwargs)
File "/Users/Mike/Desktop/Main/Django-Development/BBN/Knights/views.py" in posting_draft
245. alertnum = get_alertnum(user)
File "/Library/Python/2.7/site-packages/Django-1.4-py2.7.egg/django/contrib/auth/decorators.py" in _wrapped_view
19. if test_func(request.user):
File "/Library/Python/2.7/site-packages/Django-1.4-py2.7.egg/django/utils/functional.py" in inner
185. return func(self._wrapped, *args)
Exception Type: AttributeError at /posting/drafts
Exception Value: 'User' object has no attribute 'user'
您需要從get_alertnum()函數中刪除@login_required()裝飾器。 裝飾器假設第一個參數是請求對象,並且正在嘗試訪問用戶屬性。
您還可以通過以下方式簡化和加速功能:
def get_alertnum(user):
return Alert.objects.filter(read=False, for_user=user).count()
以下是計數方法的說明。
https://docs.djangoproject.com/en/dev/ref/models/querysets/#count
@login_required
裝飾器僅適用於第一個參數是請求的函數。 您的堆棧跟蹤是因為它嘗試將user
對象用作request
對象,並且它不起作用。 (正如其他答案所指出的, user
對象沒有.user
屬性)
也許相反, get_alertnum()
可以先檢查user.is_authenticated()
,如果用戶未經過身份驗證,則返回0
。
例如:
def get_alertnum(user):
if not user.is_authenticated():
return 0
else:
return Alerts.objects.filter(read=False, for_user=user).count()
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