django管理员加载错误：ImportError位于/admin/login/没有名为backends的模块

Question

突然，我似乎无法访问django应用程序上的管理员。这是我收到的错误信息，知道会发生什么吗？自上次打开以来，我没有更改任何管理或设置数据。

ImportError位于/admin/login/No名为backends的模块请求方法：POST请求URL:http://localhost:8000/admin/login/?next=/admin/Django版本：1.9。dev20150119161257异常类型：ImportError异常值：
没有名为后端异常位置的模块：/System/Library/Frameworks/Python。framework/Versions/2.7/lib/python2。7/importlib/init。导入模块第37行Python可执行文件：/usr/bin/Python版本：2.7。6 Python路径：
['/Users/saraabi/Sites/django_testapp'，'/Library/Python/2.7/site packages/pip-6.0.6-py2.7.egg'，'/Users/saraabi/django trunk'，'/System/Library/Frameworks/Python/Frameworks/2.7/lib/python27.zip'，'/System/Library/Frameworks/python2.7/python2.7'，'/System/Frameworks/Frameworks/Frameworks/Frameworks/Python.framework/Versions/2.7/lib/python2.7/python2.7。7/plat darwin'、'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat mac'、'/System/lib/Frameworks/python2.7/plat mac/lib scriptpackages'、'/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/lib/python2'、/System/lib/Frameworks/python2。7/lib-tk'、'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old'、'/System/lib/lib/python2.7/lib-dynload'、'/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/Python/PyObjC'、'/lib/Python/2.7/site-packages']服务器时间：2015年7月16日星期四23:31:24 0000

环境：

请求方法：发布请求URL:http://localhost:8000/admin/login/?next=/admin/

Django版本：1.9.dev20150119161257Python版本：2.7.6安装的应用程序：（django.contrib.admin，django.contrib.auth，django.contrib.contenttypes，django.contrib.sessions，django.contrib.messages，'django.contrib.staticfiles'，'testapp'）已安装的中间件：（'django.contrib.sessions.middleware.SessionMiddleware'，'django.middleware.common.公共中间件'，'django.middleware.csrf.CsrfViewMiddleware'，'django.contrib.auth.middleware.身份验证中间件'，'django.contrib.auth.middleware.Session身份验证中间件', '<--django.middleware.clickjacking.XFrameOptionsMiddlewaredjango.middleware.security.SecurityMiddleware

回溯：get_响应131中的文件“/Users/saraabi/django trunk/django/core/handlers/base.py”。response=wrapped_callback（请求，*callback_args，**callback_kwargs）文件“/Users/saraabi/django trunk/django/views/decorators/cache.py”在_wrapped_view_func 54中。response=view_func（请求，*args，**kwargs）文件“/Users/saraabi/django trunk/django/contrib/admin/sites.py”，登录388。在敏感的\u post\u参数\u包装76中返回登录（请求，**默认值）文件“/Users/saraabi/django trunk/django/views/decorators/debug.py”。返回视图110中的视图（请求、*args、**kwargs）文件“/Users/saraabi/django-trunk/django/utils/decorators.py”。response=view_func（请求，*args，**kwargs）文件“/Users/saraabi/django-trunk/django/views/decorators/cache.py”在_-wrapped_-view_-func 54中。response=view_func（请求，*args，**kwargs）文件“/Users/saraabi/django trunk/django/contrib/auth/views.py”在登录40中。如果形式。is_valid（）：文件“/Users/saraabi/django trunk/django/forms/forms.py”在is_valid 136中有效。回归自我。被束缚而不是自我。错误128中的错误文件“/Users/saraabi/django trunk/django/forms/forms.py”。自己full_clean（）文件“/Users/saraabi/django trunk/django/forms/forms.py”在full_clean 345中。自我_clean_form（）文件“/Users/saraabi/django-trunk/django/forms/forms.py”，位于表单369中。数据=自我。clean（）文件“/Users/saraabi/django trunk/django/contrib/auth/forms.py”在clean 165中。password=password）文件“/Users/saraabi/django trunk/django/contrib/auth/init.py”，位于authenticate 60中。对于后端，_get_backends中的backend_路径（return_tuples=True）：文件“/Users/saraabi/django trunk/django/contrib/auth/init.py”在_get_backends 27中。backend=load_backend（backend_path）文件“/Users/saraabi/django trunk/django/contrib/auth/init.py”，位于load_backend 21中。在import_string 22中返回import_string（path）（）文件“/Users/saraabi/django trunk/django/utils/module_load.py”。module=import_module（module_路径）文件“/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/init.py”，在import_module 37中。导入（名称）

异常类型：重要错误在 /admin/login/异常值：没有模块命名后端

Answer 1

import os
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

DEBUG = True

TEMPLATE_DEBUG = True

ALLOWED_HOSTS = []

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'testapp',
)

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

ROOT_URLCONF = 'django_testapp.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, 'templates')],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'django_testapp.wsgi.application'


DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}

AUTHENTICATION_BACKENDS = [
    'testapp.backends.EmailBackend',
    'django.contrib.auth.backends.ModelBackend',
]

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True


STATIC_URL = '/static/'

Answer 2

设置。派克

import os
BASE_DIR = os.path.dirname(os.path.dirname(__file__))
PROJECT_DIR = os.path.dirname(os.path.dirname(__file__) + '/../')

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django.contrib.sites',
)

TEMPLATE_CONTEXT_PROCESSORS = (
    'django.contrib.auth.context_processors.auth',
    'django.core.context_processors.request',
)

MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
)
SITE_ID = 1

ROOT_URLCONF = 'apps.urls'

WSGI_APPLICATION = 'apps.wsgi.application'

TEMPLATE_DIRS = (
    PROJECT_DIR + '/templates/',
)

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}