Django django-haystack cannot import CategoryBase from django-categories on the first run -

i have custom category model extends categorybase in django-categories.

when put haystack index , restart server, on first run complains cannot import name categorybase categorybase cannot imported categories.base if refresh page again site runs fine , search result returns correct information. seems because of order of imports.

i looked @ stacktrace , found out error originating admin.autodiscover inside urls.py imports looks in urls.py

from django.conf.urls import patterns, include, url django.contrib import admin admin.autodiscover()            django.conf import settings django.contrib.staticfiles.urls import staticfiles_urlpatterns django.views.generic import templateview django.contrib.sitemaps import genericsitemap galleries.models import gallery  events.models import event django.contrib.auth.views import login, logout dajaxice.core import dajaxice_autodiscover, dajaxice_config core.models import staticpagesitemap articles.models import articlesitemap, issuesitemap dajaxice_autodiscover()    

i have tried moving autodiscover after imports below:

from django.conf.urls import patterns, include, url django.contrib import admin django.conf import settings django.contrib.staticfiles.urls import staticfiles_urlpatterns django.views.generic import templateview django.contrib.sitemaps import genericsitemap galleries.models import gallery  events.models import event django.contrib.auth.views import login, logout dajaxice.core import dajaxice_autodiscover, dajaxice_config core.models import staticpagesitemap articles.models import articlesitemap, issuesitemap admin.autodiscover() dajaxice_autodiscover() 

while error has gone away on first run search not return result on categories.

here stacktrace:

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) , 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.             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. categories.models import category file "/srv/www/weddings/local/lib/python2.7/site-packages/categories/models.py" in <module>   13. .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. directory.models import listing, category directorycategory file "/srv/www/weddings/weddings_advanced/directory/models.py" in <module>   21. categories.base import categorybase  exception type: importerror @ /directory/listing/new-listing-gift exception value: cannot import name categorybase 

finally managed fix it!!!!

root cause in from categories.models import category in videos app, app model importing category extends categorybase, , it's causing circular reference, fix it, in models.py of videos app, change direct import lazy import below:

categories = models.manytomanyfield('categories.category', null=true, blank=true) 

update:

above fix worked briefly , got other circular import problems on other models, fixed upgrading haystack v2.1.0