我正在尝试将项目从Django 1.6升级到1.7。到目前为止，我已经创建了一个具有所有相同安装的新virtualenv，并将Django版本升级到新版本。我需要从南方升级，但是这样做有错误，所以我想我最初只是尝试运行服务器，我收到以下错误：
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
utility.execute()
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/core/management/__init__.py", line 354, in execute
django.setup()
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/__init__.py", line 21, in setup
apps.populate(settings.INSTALLED_APPS)
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/apps/registry.py", line 108, in populate
app_config.import_models(all_models)
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/apps/config.py", line 197, in import_models
self.models_module = import_module(models_module_name)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
File "/Users/Name/Dev/tps/products/models.py", line 127, in <module>
watson.register(Product.objects.exclude(productimage=None))
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/db/models/manager.py", line 92, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/db/models/query.py", line 698, in exclude
return self._filter_or_exclude(True, *args, **kwargs)
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/db/models/query.py", line 707, in _filter_or_exclude
clone.query.add_q(~Q(*args, **kwargs))
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1287, in add_q
clause, require_inner = self._add_q(where_part, self.used_aliases)
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1314, in _add_q
current_negated=current_negated, connector=connector)
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1138, in build_filter
lookups, parts, reffed_aggregate = self.solve_lookup_type(arg)
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1076, in solve_lookup_type
_, field, _, lookup_parts = self.names_to_path(lookup_splitted, self.get_meta())
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1339, in names_to_path
field, model, direct, m2m = opts.get_field_by_name(name)
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/db/models/options.py", line 416, in get_field_by_name
cache = self.init_name_map()
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/db/models/options.py", line 445, in init_name_map
for f, model in self.get_all_related_m2m_objects_with_model():
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/db/models/options.py", line 563, in get_all_related_m2m_objects_with_model
cache = self._fill_related_many_to_many_cache()
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/db/models/options.py", line 577, in _fill_related_many_to_many_cache
for klass in self.apps.get_models():
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/utils/lru_cache.py", line 101, in wrapper
result = user_function(*args, **kwds)
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/apps/registry.py", line 168, in get_models
self.check_models_ready()
File "/Users/Name/.virtualenvs/test17/lib/python2.7/site-packages/django/apps/registry.py", line 131, in check_models_ready
raise AppRegistryNotReady("Models aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet.
任何想法可能导致错误以及如何修复它？
答案 0 :(得分：22)
问题在于这一行（＆＃34; /Users/Name/Dev/tps/products/models.py" ;,第127行）：
watson.register(Product.objects.exclude(productimage=None))
您尝试在导入时引用模型。在Django 1.7中不再可能。 Django 1.7允许您仅在加载所有应用程序后使用模型。您应将此调用移至ready的{{1}}回调，如下所示：
AppConfig然后，您应该在from django.apps import AppConfig
class ProductsConfig(AppConfig):
name = 'products'
def ready(self):
Product = self.get_model('Product')
watson.register(Product.objects.exclude(productimage=None))
应用的AppConfig中引用此__init__.py：
products其中default_app_config = 'products.apps.ProductsConfig'
是放置配置的模块的名称。
相关的Django文档：https://docs.djangoproject.com/en/dev/ref/applications/
总的来说，由于这种变化，迁移到Django 1.7并不像人们希望的那样容易。以下是一些问题排查提示：https://docs.djangoproject.com/en/1.7/ref/applications/#troubleshooting
答案 1 :(得分：15)
当我将django项目模板更新为1.7时，我收到此错误。更改的一件事是wsgi.py文件，因此需要进行一些更新。这是我的追溯：
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/gunicorn/workers/sync.py", line 93, in handle
self.handle_request(listener, req, client, addr)
File "/usr/local/lib/python2.7/dist-packages/gunicorn/workers/sync.py", line 134, in handle_request
respiter = self.wsgi(environ, resp.start_response)
File "/home/kpmteam/staging/deploys/20141029-115625/site/lib/django/core/handlers/wsgi.py", line 168, in __call__
self.load_middleware()
File "/home/kpmteam/staging/deploys/20141029-115625/site/lib/django/core/handlers/base.py", line 46, in load_middleware
mw_instance = mw_class()
File "/home/kpmteam/staging/deploys/20141029-115625/site/lib/django/middleware/locale.py", line 23, in __init__
for url_pattern in get_resolver(None).url_patterns:
File "/home/kpmteam/staging/deploys/20141029-115625/site/lib/django/core/urlresolvers.py", line 372, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/home/kpmteam/staging/deploys/20141029-115625/site/lib/django/core/urlresolvers.py", line 366, in urlconf_module
self._urlconf_module = import_module(self.urlconf_name)
File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
File "/home/kpmteam/staging/site/kpm/urls.py", line 7, in <module>
admin.autodiscover()
File "/home/kpmteam/staging/deploys/20141029-115625/site/lib/django/contrib/admin/__init__.py", line 23, in autodiscover
autodiscover_modules('admin', register_to=site)
File "/home/kpmteam/staging/deploys/20141029-115625/site/lib/django/utils/module_loading.py", line 67, in autodiscover_modules
for app_config in apps.get_app_configs():
File "/home/kpmteam/staging/deploys/20141029-115625/site/lib/django/apps/registry.py", line 137, in get_app_configs
self.check_apps_ready()
File "/home/kpmteam/staging/deploys/20141029-115625/site/lib/django/apps/registry.py", line 124, in check_apps_ready
raise AppRegistryNotReady("Apps aren't loaded yet.")
AppRegistryNotReady: Apps aren't loaded yet.
这就是wsgi.py文件的样子：
import os
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "settings")
import django.core.handlers.wsgi
application = django.core.handlers.wsgi.WSGIHandler()
现在（用gunicorn 19.1.0运行Django 1.7）：
import os
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "settings")
from django.core.wsgi import get_wsgi_application
application = get_wsgi_application()
更改最后两行修复它。请注意，您的DJANGO_SETTINGS_MODULE可能不同，通常是＆＃34; project_name.settings＆＃34;
答案 2 :(得分：14)
我迟到了，但是如果你正在使用django-registration，你将不得不切换到django-regitration-redux。
https://pypi.python.org/pypi/django-registration-redux/
请参阅此答案：Django-registration compatibility issue with django 1.7
答案 3 :(得分：5)
我找到了解决方案：
import django
django.setup()