为什么 django 抱怨我还没有设置我的 ENGINE？

Question

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql', # Add 'postgresql_psycopg2', 'postgresql', 'mysql', 'sqlite3' or 'oracle'.
        'NAME': 'djangobb',                      # Or path to database file if using sqlite3.
        'USER': 'root',                      # Not used with sqlite3.
        'PASSWORD': 'root',                  # Not used with sqlite3.
        'HOST': '',                      # Set to empty string for localhost. Not used with sqlite3.
        'PORT': '',                      # Set to empty string for default. Not used with sqlite3.
    }
}

有什么想法吗？我无法使用 manage.py 运行 syncdb 命令：

    Environment:

Request Method: GET
Request URL: http://localhost:8000/admin/
Django Version: 1.2.1
Python Version: 2.5.4
Installed Applications:
['django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.sitemaps',
 'django.contrib.admin',
 'django.contrib.admindocs',
 'registration',
 'django_authopenid',
 'djangobb_forum',
 'djapian',
 'messages']
Installed Middleware:
('django.middleware.cache.UpdateCacheMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.locale.LocaleMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.csrf.middleware.CsrfMiddleware',
 'django_authopenid.middleware.OpenIDMiddleware',
 'django.middleware.cache.FetchFromCacheMiddleware',
 'django.middleware.transaction.TransactionMiddleware',
 'djangobb_forum.middleware.LastLoginMiddleware',
 'djangobb_forum.middleware.UsersOnline')


Traceback:
File "C:\Python25\Lib\site-packages\django\core\handlers\base.py" in get_response
  80.                     response = middleware_method(request)
File "C:\Python25\Lib\site-packages\django\middleware\locale.py" in process_request
  16.         language = translation.get_language_from_request(request)
File "C:\Python25\Lib\site-packages\django\utils\translation\__init__.py" in get_language_from_request
  90.     return real_get_language_from_request(request)
File "C:\PYTHON25\lib\site-packages\django\utils\functional.py" in _curried
  55.         return _curried_func(*(args+moreargs), **dict(kwargs, **morekwargs))
File "C:\Python25\Lib\site-packages\django\utils\translation\__init__.py" in delayed_loader
  36.     return getattr(trans, real_name)(*args, **kwargs)
File "C:\Python25\Lib\site-packages\django\utils\translation\trans_real.py" in get_language_from_request
  339.         lang_code = request.session.get('django_language', None)
File "C:\Python25\Lib\site-packages\django\contrib\sessions\backends\base.py" in get
  63.         return self._session.get(key, default)
File "C:\Python25\Lib\site-packages\django\contrib\sessions\backends\base.py" in _get_session
  172.                 self._session_cache = self.load()
File "C:\Python25\Lib\site-packages\django\contrib\sessions\backends\db.py" in load
  20.                 expire_date__gt=datetime.datetime.now()
File "C:\Python25\lib\site-packages\django\db\models\manager.py" in get
  132.         return self.get_query_set().get(*args, **kwargs)
File "C:\Python25\Lib\site-packages\django\db\models\query.py" in get
  336.         num = len(clone)
File "C:\Python25\Lib\site-packages\django\db\models\query.py" in __len__
  81.                 self._result_cache = list(self.iterator())
File "C:\Python25\Lib\site-packages\django\db\models\query.py" in iterator
  269.         for row in compiler.results_iter():
File "C:\Python25\Lib\site-packages\django\db\models\sql\compiler.py" in results_iter
  672.         for rows in self.execute_sql(MULTI):
File "C:\Python25\Lib\site-packages\django\db\models\sql\compiler.py" in execute_sql
  717.             sql, params = self.as_sql()
File "C:\Python25\Lib\site-packages\django\db\models\sql\compiler.py" in as_sql
  56.         out_cols = self.get_columns(with_col_aliases)
File "C:\Python25\Lib\site-packages\django\db\models\sql\compiler.py" in get_columns
  185.                     col_aliases)
File "C:\Python25\Lib\site-packages\django\db\models\sql\compiler.py" in get_default_columns
  273.                 r = '%s.%s' % (qn(alias), qn2(field.column))
File "C:\Python25\Lib\site-packages\django\db\models\sql\compiler.py" in quote_name_unless_alias
  43.         r = self.connection.ops.quote_name(name)
File "C:\Python25\lib\site-packages\django\db\backends\dummy\base.py" in complain
  15.     raise ImproperlyConfigured("You haven't set the database ENGINE setting yet.")

Exception Type: ImproperlyConfigured at /admin/
Exception Value: You haven't set the database ENGINE setting yet.

Answer 1

我设置了我的旧方式和新方式，所以它不是 django-version-specific：

DATABASE_ENGINE   = 'django.db.backends.sqlite3'
DATABASE_NAME     = '/path/to/db/foo.sqlite3'
DATABASE_USER     = ''
DATABASE_PASSWORD = ''
DATABASE_HOST     = ''
DATABASE_PORT     = ''

DATABASES = {
  'default': {
    'ENGINE':   DATABASE_ENGINE,
    'NAME':     DATABASE_NAME,
    'USER':     DATABASE_USER,
    'PASSWORD': DATABASE_PASSWORD,
    'HOST':     DATABASE_HOST,
    'PORT':     DATABASE_PORT,
  }
}

但是，是的，我会仔细检查您的安装是否是您认为的版本。

更新：

您可能正在尝试从管理模块的设置中导入某些内容，并在设置中导入管理模块。有时循环导入会导致上述情况。

特别是，在设置中使用 reverse("url-name") 可能会导致这种情况，因为它最终会迫使它在某个深层次上查看“站点”表...

更新2：

对不起，解释一下：

• 循环导入是指模块 A 从模块 B 导入，在某种程度上，模块 B 也需要来自模块 A 的东西。在第二级深度的某个时刻，它通常会以某种难以理解的方式失败。李>
• Reverse() 是将 url 的名称（urls.py 中的 name="foo"）转换回 url 本身的函数。这使得在设置或管理模块中并不总是可以调用。

更新3：

查看您指向的票证 djangobb.org/ticket/81，为了分解一些条款，csrf 令牌是用于添加跨站点请求伪造保护的模板标签：

http://docs.djangoproject.com/en/dev/ref/contrib/csrf/

通常看起来像这样，从我的项目中 grep：

# grep -ri csrf .
  ./registration/login.html:  <form method="post" action="{% url django.contrib.auth.views.login %}">{% csrf_token %}

关于 djapian 的主干的一点，虽然我自己不知道 djapian 是什么，但通常意味着直接安装（通常是 svn）主干——或者“最新的，签入版本，这是较新的比任何发布的，并且可能经过测试的官方版本都多”。通常，这涉及执行类似svn checkout http://wherever.com/someproject/trunk/ ./someproject 之类的操作，然后转到该目录进行安装。