logo标签列表

Django 1.7 升级错误：AppRegistryNotReady: 模型还未加载

djangodjango-1.7
18

我正在尝试将一个项目从Django 1.6升级到1.7。到目前为止，我已经创建了一个新的虚拟环境，并安装了所有相同的软件包，并将Django版本升级到了新版本。我需要从South进行升级，但在这样做时遇到了错误，因此我想我会首先尝试运行服务器，结果我收到以下错误：

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.

你有什么想法可能导致出现错误，以及如何修复它吗？

你从已安装的应用中删除了南方吗？ - Raja Simon
是的，我按照这里的步骤进行了操作：链接，但我仍然遇到了错误。 - Pete Drennan
注意：我正在使用django-allauth，并对该应用程序中的迁移执行相同的操作，不确定是否会引起问题。 - Pete Drennan
当我运行runserver或任何带manage.py的操作时，我反复遇到了这个错误。这是在成功升级到1.7之后很久才出现的。结果发现这与升级无关，而是因为我复制了一堆代码作为参考，并将其留在了models.py文件的底部。 - MagicLAMP
4个回答
22

问题出在这行代码上 ("/Users/Name/Dev/tps/products/models.py", line 127):

watson.register(Product.objects.exclude(productimage=None))

您试图在导入时引用一个模型。在Django 1.7中不再可能这样做。Django 1.7允许您仅在加载所有应用程序后使用模型。您应该将此调用移动到AppConfig的ready回调中，像这样：

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))

那么您应该在products应用程序的__init__.py中引用此AppConfig：

default_app_config = 'products.apps.ProductsConfig'

其中 apps 是放置配置的模块名称。

相关的 Django 文档链接：https://docs.djangoproject.com/en/dev/ref/applications/

总的来说，由于这个更改的原因，迁移到 Django 1.7 不像人们希望的那样容易。以下是一些故障排除提示：https://docs.djangoproject.com/en/1.7/ref/applications/#troubleshooting

谢谢Vasily，我会尝试进行这些更改，并告诉您它们的进展情况。这是第三方搜索应用程序Watson，所以我猜他们需要对他们的应用程序进行这些更改以适应1.7版本。 - Pete Drennan
1
太棒了，成功了！我在Watson中注册了多个搜索，并将它们全部放在那里。我只需要在apps.py中添加“import Watson”即可。 - Pete Drennan
我遇到了这个错误，因为我的wsgi.py文件已经过时了。Django 1.7有一个新的格式，修复后使用gunicorn 19.1.0一切正常（19.1.1有问题）。在运行服务器时一切正常，所以我只在生产部署中遇到了这个问题。 - radtek
当我运行runserver或任何带manage.py的操作时，我反复遇到这个错误。这是在成功升级到1.7之后很久才出现的。结果证明这与升级无关，而是因为我复制了一堆代码作为参考，并将其留在了models.py文件的底部。在Django 1.7中，如果你遇到这个错误，那么错误可能会在models.py文件的某个地方。 - MagicLAMP
16
当我把Django项目模板更新到1.7时，遇到了这个错误。有一件事情发生了改变，那就是wsgi.py文件需要一些更新。以下是我的回溯信息：
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.

这是 wsgi.py 文件的内容：

这是 wsgi.py 文件的内容：

import os
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "settings")
import django.core.handlers.wsgi
application = django.core.handlers.wsgi.WSGIHandler()

现在（使用Django 1.7和gunicorn 19.1.0）：

import os
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "settings")
from django.core.wsgi import get_wsgi_application
application = get_wsgi_application()

改变最后两行代码就可以解决问题。请注意你的DJANGO_SETTINGS_MODULE可能不同，通常是 "project_name.settings"。
14
5
我发现解决方法是这样的：
import django

django.setup()

网页内容由stack overflow 提供, 点击上面的
可以查看英文原文，
原文链接