我有一个自定义类别模型扩展了CategoryBasedjango-categories。
当我将它放入干草堆索引并重新启动服务器时，在第一次运行时它会抱怨cannot import name CategoryBase无法CategoryBase从中导入，categories.base但是如果我再次刷新页面，该站点运行正常并且搜索结果返回正确的信息。这似乎是因为进口的顺序。
我查看了堆栈跟踪，发现了源自admin.autodiscoverurls.py 内部的错误，导入在 urls.py 中看起来像这样
from django.conf.urls import patterns, include, url
from django.contrib import admin
admin.autodiscover()
from django.conf import settings
from django.contrib.staticfiles.urls import staticfiles_urlpatterns
from django.views.generic import TemplateView
from django.contrib.sitemaps import GenericSitemap
from galleries.models import Gallery
from events.models import Event
from django.contrib.auth.views import login, logout
from dajaxice.core import dajaxice_autodiscover, dajaxice_config
from core.models import StaticPageSitemap
from articles.models import ArticleSitemap, IssueSitemap
dajaxice_autodiscover()
我尝试将自动发现移动到所有导入之后，如下所示：
from django.conf.urls import patterns, include, url
from django.contrib import admin
from django.conf import settings
from django.contrib.staticfiles.urls import staticfiles_urlpatterns
from django.views.generic import TemplateView
from django.contrib.sitemaps import GenericSitemap
from galleries.models import Gallery
from events.models import Event
from django.contrib.auth.views import login, logout
from dajaxice.core import dajaxice_autodiscover, dajaxice_config
from core.models import StaticPageSitemap
from articles.models import ArticleSitemap, IssueSitemap
admin.autodiscover()
dajaxice_autodiscover()
虽然错误在第一次运行时消失了，但搜索没有返回任何类别的结果。
这是堆栈跟踪：
Django Version: 1.5
Python Version: 2.7.3
Installed Applications:
['django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.comments',
'django.contrib.sites',
'django.contrib.markup',
'django.contrib.messages',
'django.contrib.staticfiles',
'django.contrib.sitemaps',
'django.contrib.sessions',
'django.contrib.admin',
'djcelery',
'filebrowser',
'compressor',
'south',
'taggit',
'categories',
'categories.editor',
'core',
'articles',
'newsletters',
'galleries',
'events',
'haystack',
'dajaxice',
'zencode',
'videos',
'directory',
'dps_payment',
'home',
'taggit_autosuggest',
'captcha',
'search',
'media_board']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware')
Traceback:
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
92. response = middleware_method(request)
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/middleware/common.py" in process_request
69. if (not urlresolvers.is_valid_path(request.path_info, urlconf) and
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/core/urlresolvers.py" in is_valid_path
551. resolve(path, urlconf)
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/core/urlresolvers.py" in resolve
440. return get_resolver(urlconf).resolve(path)
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/core/urlresolvers.py" in resolve
319. for pattern in self.url_patterns:
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/core/urlresolvers.py" in url_patterns
347. patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/core/urlresolvers.py" in urlconf_module
342. self._urlconf_module = import_module(self.urlconf_name)
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/utils/importlib.py" in import_module
35. __import__(name)
File "/srv/www/weddings/weddings_advanced/weddings/urls.py" in <module>
3. admin.autodiscover()
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/contrib/admin/__init__.py" in autodiscover
29. import_module('%s.admin' % app)
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/utils/importlib.py" in import_module
35. __import__(name)
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/contrib/auth/admin.py" in <module>
172. admin.site.register(Group, GroupAdmin)
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/contrib/admin/sites.py" in register
98. validate(admin_class, model)
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/contrib/admin/validation.py" in validate
22. models.get_apps()
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/db/models/loading.py" in get_apps
134. self._populate()
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/db/models/loading.py" in _populate
75. self.load_app(app_name)
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/db/models/loading.py" in load_app
96. models = import_module('.models', app_name)
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/utils/importlib.py" in import_module
35. __import__(name)
File "/srv/www/weddings/weddings_advanced/videos/models.py" in <module>
9. from categories.models import Category
File "/srv/www/weddings/local/lib/python2.7/site-packages/categories/models.py" in <module>
13. from .base import CategoryBase
File "/srv/www/weddings/local/lib/python2.7/site-packages/categories/base.py" in <module>
32. class CategoryBase(MPTTModel):
File "/srv/www/weddings/local/lib/python2.7/site-packages/categories/base.py" in CategoryBase
41. verbose_name=_('parent'))
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/utils/translation/__init__.py" in ugettext
71. return _trans.ugettext(message)
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py" in ugettext
276. return do_translate(message, 'ugettext')
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py" in do_translate
258. _default = translation(settings.LANGUAGE_CODE)
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py" in translation
172. default_translation = _fetch(settings.LANGUAGE_CODE)
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py" in _fetch
154. app = import_module(appname)
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/utils/importlib.py" in import_module
35. __import__(name)
File "/srv/www/weddings/local/lib/python2.7/site-packages/haystack/__init__.py" in <module>
154. handle_registrations()
File "/srv/www/weddings/local/lib/python2.7/site-packages/haystack/__init__.py" in handle_registrations
151. search_sites_conf = importlib.import_module(settings.HAYSTACK_SITECONF)
File "/srv/www/weddings/local/lib/python2.7/site-packages/django/utils/importlib.py" in import_module
35. __import__(name)
File "/srv/www/weddings/weddings_advanced/search/search_sites.py" in <module>
8. from directory.models import Listing, Category as DirectoryCategory
File "/srv/www/weddings/weddings_advanced/directory/models.py" in <module>
21. from categories.base import CategoryBase
Exception Type: ImportError at /directory/listing/new-listing-gift
Exception Value: cannot import name CategoryBase