Django项目中的中间件不正确(导入REDIS函数)

Question

我正在为我的Django应用程序编写中间件，在该应用程序中我从request.session获得了一个变量，然后必须将其插入Redis排序集中。相当直截了当。

即。

import os
#os.environ.setdefault("DJANGO_SETTINGS_MODULE","myproject.settings")
from myapp.redis_functions import set_whose_online
class WhoseOnlineMiddleware(object):
    def process_request(self, request):
        if '_auth_user_id' in request.session:
            set_whose_online(request.session['_auth_user_id'])
        else:
            pass

redis_functions.py在我的应用中包含所有与REDIS相关的功能。Redis连接池也在那里实例化。

，这给了我ImporperlyConfigured的CC_3错误。完整的追溯是：

Traceback (most recent call last):
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 85, in run
    self.result = application(self.environ, self.start_response)
  File "/home/myuser/.virtualenvs/myenv/local/lib/python2.7/site-packages/django/contrib/staticfiles/handlers.py", line 72, in __call__
    return self.application(environ, start_response)
  File "/home/myuser/.virtualenvs/myenv/local/lib/python2.7/site-packages/dj_static.py", line 83, in __call__
    return self.application(environ, start_response)
  File "/home/myuser/.virtualenvs/myenv/local/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 236, in __call__
    self.load_middleware()
  File "/home/myuser/.virtualenvs/myenv/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 53, in load_middleware
    raise exceptions.ImproperlyConfigured('Error importing middleware %s: "%s"' % (mw_module, e))
ImproperlyConfigured: Error importing middleware myproject.middleware.WhoseOnline: "cannot import name add_filtered_post"

这是令人困惑的，因为我不是要导入add_filtered_post，而是要导入set_whose_online。add_filtered_post是redis_functions.py中的另一个功能，完全在其他地方使用。

可能会发生什么，我该如何解决这个问题？我猜想要归咎于循环进口，但是python manage.py validate --traceback返回0个错误。

---

这是我在settings.py中拥有的：

MIDDLEWARE_CLASSES = (
    'myproject.middleware.XForwardedFor.XForwardedForMiddleware',
    'user_sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'myproject.middleware.WhoseOnline.WhoseOnlineMiddleware',
    #'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'myproject.middleware.HellBanned.HellBannedMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'mobileesp.middleware.MobileDetectionMiddleware',
    # Uncomment the next line for simple clickjacking protection:
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
)

注意：中间件是在myfolder/myproject/middleware/WhoseOnline.py上添加的，即与settings.py，URL，模板

Answer 1

虽然可能有多种原因发生，但在我的特殊情况下，这是因为循环导入。我诊断并解决了这个问题，这消失了。