Django 错误：“没有名为 django.sessions 的模块”[重复]

Question

我的 Django 项目出现错误，我想找到解决方案。

我用 MySQL 数据库开发了我的项目，但经过一些讨论，出于不同的原因，我想用 NoSQL 数据库（以及 Django MongoDB 命令的 Django ORM 命令）替换 MySQL：

• 能够处理数十亿行
• 制作大数据的能力（Hadoop，...）

我的 Django 项目设置如下：

import mongoengine 
from mongoengine import connect

AUTHENTICATION_BACKENDS = (
    'mongoengine.django.auth.MongoEngineBackend',
)

SESSION_ENGINE = 'mongoengine.django.sessions'
SESSION_SERIALIZER = 'mongoengine.django.sessions.BSONSerializer'

DATABASES = { 
     'default': {
          'ENGINE': 'django.db.backends.dummy' 
     }
}

MONGO_DATABASE_NAME = 'XXX'
MONGO_HOST = '172.30.10.X'
MONGO_PORT = 27017
connect(MONGO_DATABASE_NAME, host=MONGO_HOST, port=MONGO_PORT)

而且，当我跑步时：python manage.py runserver

我明白了：

System check identified 1 issue (0 silenced).
March 20, 2017 - 10:33:20
Django version 1.10.3, using settings 'Etat_civil.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
Unhandled exception in thread started by <function wrapper at 0x104994140>
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/django/utils/autoreload.py", line 226, in wrapper
    fn(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 142, in inner_run
    handler = self.get_handler(*args, **options)
  File "/usr/local/lib/python2.7/site-packages/django/contrib/staticfiles/management/commands/runserver.py", line 27, in get_handler
    handler = super(Command, self).get_handler(*args, **options)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 64, in get_handler
    return get_internal_wsgi_application()
  File "/usr/local/lib/python2.7/site-packages/django/core/servers/basehttp.py", line 59, in get_internal_wsgi_application
    sys.exc_info()[2])
  File "/usr/local/lib/python2.7/site-packages/django/core/servers/basehttp.py", line 49, in get_internal_wsgi_application
    return import_string(app_path)
  File "/usr/local/lib/python2.7/site-packages/django/utils/module_loading.py", line 20, in import_string
    module = import_module(module_path)
  File "/usr/local/Cellar/python/2.7.12_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/Users/valentinjungbluth/Desktop/Django/Etat_civil/Etat_civil/wsgi.py", line 16, in <module>
    application = get_wsgi_application()
  File "/usr/local/lib/python2.7/site-packages/django/core/wsgi.py", line 14, in get_wsgi_application
    return WSGIHandler()
  File "/usr/local/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 153, in __init__
    self.load_middleware()
  File "/usr/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 58, in load_middleware
    mw_instance = mw_class()
  File "/usr/local/lib/python2.7/site-packages/django/contrib/sessions/middleware.py", line 15, in __init__
    engine = import_module(settings.SESSION_ENGINE)
  File "/usr/local/Cellar/python/2.7.12_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
django.core.exceptions.ImproperlyConfigured: WSGI application 'Etat_civil.wsgi.application' could not be loaded; Error importing module: 'No module named django.sessions'

我知道最新的mongoengine 更新不支持会话，所以我下载了mongoengine==0.9.0，但它似乎不起作用。

你有什么想法吗？

Answer 1

我没有使用 mongodb 作为引擎，但是 Django 文档说数据库应该使用这种格式声明： 阅读https://docs.djangoproject.com/en/1.10/ref/databases/

DATABASES = {
    'default': {
        'ENGINE': django_mongodb_engine',
        'NAME': 'XXX',
        'USER': 'a_user',
        'PASSWORD': 'a_password',
        'HOST': '',
        'PORT': '',
    }
}