【发布时间】：2011-04-07 16:30:05
【问题描述】：
我必须将应用程序从一台服务器移动到另一台服务器。它也是debian，所以我安装了旧服务器上安装的所有python包，然后将文件移动到相同的目录（我希望：D）
当我尝试检查它是否有效时，我收到这样的错误：
URI: '/'
Location: '/'
Directory: None
Filename: '/var/www/'
PathInfo: ''
Phase: 'PythonHandler'
Handler: 'django.core.handlers.modpython'
Traceback (most recent call last):
File "/usr/lib/python2.6/dist-packages/mod_python/importer.py", line 1537, in HandlerDispatch
default=default_handler, arg=req, silent=hlist.silent)
File "/usr/lib/python2.6/dist-packages/mod_python/importer.py", line 1229, in _process_target
result = _execute_target(config, req, object, arg)
File "/usr/lib/python2.6/dist-packages/mod_python/importer.py", line 1128, in _execute_target
result = object(arg)
File "/usr/lib/pymodules/python2.6/django/core/handlers/modpython.py", line 228, in handler
return ModPythonHandler()(req)
File "/usr/lib/pymodules/python2.6/django/core/handlers/modpython.py", line 201, in __call__
response = self.get_response(request)
File "/usr/lib/pymodules/python2.6/django/core/handlers/base.py", line 141, in get_response
return self.handle_uncaught_exception(request, resolver, sys.exc_info())
File "/usr/lib/pymodules/python2.6/django/core/handlers/base.py", line 165, in handle_uncaught_exception
return debug.technical_500_response(request, *exc_info)
File "/usr/lib/pymodules/python2.6/django/views/debug.py", line 58, in technical_500_response
html = reporter.get_traceback_html()
File "/usr/lib/pymodules/python2.6/django/views/debug.py", line 137, in get_traceback_html
return t.render(c)
File "/usr/lib/pymodules/python2.6/django/template/__init__.py", line 173, in render
return self._render(context)
File "/usr/lib/pymodules/python2.6/django/template/__init__.py", line 167, in _render
return self.nodelist.render(context)
File "/usr/lib/pymodules/python2.6/django/template/__init__.py", line 796, in render
bits.append(self.render_node(node, context))
File "/usr/lib/pymodules/python2.6/django/template/debug.py", line 72, in render_node
result = node.render(context)
File "/usr/lib/pymodules/python2.6/django/template/debug.py", line 89, in render
output = self.filter_expression.resolve(context)
File "/usr/lib/pymodules/python2.6/django/template/__init__.py", line 579, in resolve
new_obj = func(obj, *arg_vals)
File "/usr/lib/pymodules/python2.6/django/template/defaultfilters.py", line 697, in date
return format(value, arg)
File "/usr/lib/pymodules/python2.6/django/utils/dateformat.py", line 281, in format
return df.format(format_string)
File "/usr/lib/pymodules/python2.6/django/utils/dateformat.py", line 30, in format
pieces.append(force_unicode(getattr(self, piece)()))
File "/usr/lib/pymodules/python2.6/django/utils/dateformat.py", line 187, in r
return self.format('D, j M Y H:i:s O')
File "/usr/lib/pymodules/python2.6/django/utils/dateformat.py", line 30, in format
pieces.append(force_unicode(getattr(self, piece)()))
File "/usr/lib/pymodules/python2.6/django/utils/encoding.py", line 66, in force_unicode
s = unicode(s)
File "/usr/lib/pymodules/python2.6/django/utils/functional.py", line 206, in __unicode_cast
return self.__func(*self.__args, **self.__kw)
File "/usr/lib/pymodules/python2.6/django/utils/translation/__init__.py", line 55, in ugettext
return real_ugettext(message)
File "/usr/lib/pymodules/python2.6/django/utils/functional.py", line 55, in _curried
return _curried_func(*(args+moreargs), **dict(kwargs, **morekwargs))
File "/usr/lib/pymodules/python2.6/django/utils/translation/__init__.py", line 36, in delayed_loader
return getattr(trans, real_name)(*args, **kwargs)
File "/usr/lib/pymodules/python2.6/django/utils/translation/trans_real.py", line 276, in ugettext
return do_translate(message, 'ugettext')
File "/usr/lib/pymodules/python2.6/django/utils/translation/trans_real.py", line 266, in do_translate
_default = translation(settings.LANGUAGE_CODE)
File "/usr/lib/pymodules/python2.6/django/utils/translation/trans_real.py", line 176, in translation
default_translation = _fetch(settings.LANGUAGE_CODE)
File "/usr/lib/pymodules/python2.6/django/utils/translation/trans_real.py", line 159, in _fetch
app = import_module(appname)
File "/usr/lib/pymodules/python2.6/django/utils/importlib.py", line 35, in import_module
__import__(name)
File "/usr/lib/pymodules/python2.6/django/contrib/admin/__init__.py", line 1, in <module>
from django.contrib.admin.helpers import ACTION_CHECKBOX_NAME
File "/usr/lib/pymodules/python2.6/django/contrib/admin/helpers.py", line 1, in <module>
from django import forms
File "/usr/lib/pymodules/python2.6/django/forms/__init__.py", line 17, in <module>
from models import *
File "/usr/lib/pymodules/python2.6/django/forms/models.py", line 6, in <module>
from django.db import connections
File "/usr/lib/pymodules/python2.6/django/db/__init__.py", line 77, in <module>
connection = connections[DEFAULT_DB_ALIAS]
File "/usr/lib/pymodules/python2.6/django/db/utils.py", line 91, in __getitem__
backend = load_backend(db['ENGINE'])
File "/usr/lib/pymodules/python2.6/django/db/utils.py", line 49, in load_backend
raise ImproperlyConfigured(error_msg)
TemplateSyntaxError: Caught ImproperlyConfigured while rendering: 'django.db.backends.postgresql' isn't an available database backend.
Try using django.db.backends.XXX, where XXX is one of:
'dummy', 'mysql', 'oracle', 'postgresql', 'postgresql_psycopg2', 'sqlite3'
Error was: cannot import name utils
我不知道我忘了安装什么。不幸的是 - 在移动之前无法检查它是否有效（旧服务器已关闭）。为了更好地理解 - 很久以前的应用程序可以正常工作。比有一些 apt-get dist-upgrade，这可能会导致这个错误。今天我想使用这个应用程序，我看到服务器肯定已经关闭，所以我把所有东西都搬到了新的（很高兴，那个硬盘仍然可以工作）。
【问题讨论】：
-
"TemplateSyntaxError: Caught ImproperlyConfigured while rendering: 'django.db.backends.postgresql' 不是可用的数据库后端。"这似乎很清楚。你安装了 postgres 了吗？
-
您是否安装了
postgresql？ postgresql.org -
@Blender - 当然是的 - 我可以使用在 settings.py 中定义的相同主机和端口远程登录到 postgres