我在Django管理员方面遇到一些问题。

在syncdb之后，结果是：

  Creating tables ...
  Installing custom SQL ...
  Installing indexes ...
  No fixtures found.

这是什么意思？

无论如何，当我访问网站管理面板http://www.example.com/admin/时，我收到以下消息：

DoesNotExist at /admin/
Site matching query does not exist.

setting.py包含：

INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.sites',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    # Uncomment the next line to enable the admin:
    'django.contrib.admin',
)

ur.py包含：

from django.conf.urls.defaults import patterns, include, url

# Uncomment the next two lines to enable the admin:
from django.contrib import admin
admin.autodiscover()

urlpatterns = patterns('',
    # Examples:
    # url(r'^$', 'rshd.views.home', name='home'),
    # url(r'^rshd/', include('rshd.foo.urls')),

    # Uncomment the admin/doc line below to enable admin documentation:
     url(r'^admin/doc/', include('django.contrib.admindocs.urls')),

    # Uncomment the next line to enable the admin:
     url(r'^admin/', include(admin.site.urls)),
)