Django 1.8 admin 产生'WSGIRequest' object has no attribute 'user'的错误

配置admin时，产生'WSGIRequest' object has no attribute 'user'的错误

google了下，说是MIDDLEWARE配置的有问题，顺序应该保持参见（http://stackoverflow.com/questions/26576192/wsgirequest-object-has-no-attribute-user）：

'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.auth.middleware.SessionAuthenticationMiddleware',

但是这样设置之后，依然没有解决。 
我的MIDDLEWARE的配置是：

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

实际上，这是Django版本的问题，1.9之前，中间件的key为MIDDLEWARE_CLASSES, 1.9之后，为MIDDLEWARE。所以在开发环境和其他环境的版本不一致时，要特别小心，会有坑。 
改配置为：

MIDDLEWARE_CLASSES = [
    'django.middleware.security.SecurityMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

问题解决。 
参考 http://www.ziqiangxuetang.com/django/django-middleware.html