Django 1.8到1.9升级：django.core.exceptions.AppRegistryNotReady：应用尚未加载

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我有一个目前在Django 1.8上运行的项目。从1.9发布以来，我想我会通过更新pip install django==1.9。但是，在运行时python manage.py test -v 3，出现此错误：

Traceback (most recent call last):
  File "manage.py", line 11, in <module>
    execute_from_command_line(sys.argv)
  File "/home/user/Envs/intranet/lib/python2.7/site-packages/django/core/management/__init__.py", line 350, in execute_from_command_line
    utility.execute()
  File "/home/user/Envs/intranet/lib/python2.7/site-packages/django/core/management/__init__.py", line 324, in execute
    django.setup()
  File "/home/user/Envs/intranet/lib/python2.7/site-packages/django/__init__.py", line 18, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/home/user/Envs/intranet/lib/python2.7/site-packages/django/apps/registry.py", line 85, in populate
    app_config = AppConfig.create(entry)
  File "/home/user/Envs/intranet/lib/python2.7/site-packages/django/apps/config.py", line 90, in create
    module = import_module(entry)
  File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/home/user/Envs/intranet/lib/python2.7/site-packages/reversion/__init__.py", line 11, in <module>
    from reversion.revisions import default_revision_manager, revision_context_manager, VersionAdapter
  File "/home/user/Envs/intranet/lib/python2.7/site-packages/reversion/revisions.py", line 18, in <module>
    from django.contrib.contenttypes.models import ContentType
  File "/home/user/Envs/intranet/lib/python2.7/site-packages/django/contrib/contenttypes/models.py", line 159, in <module>
    class ContentType(models.Model):
  File "/home/user/Envs/intranet/lib/python2.7/site-packages/django/db/models/base.py", line 94, in __new__
    app_config = apps.get_containing_app_config(module)
  File "/home/user/Envs/intranet/lib/python2.7/site-packages/django/apps/registry.py", line 239, in get_containing_app_config
    self.check_apps_ready()
  File "/home/user/Envs/intranet/lib/python2.7/site-packages/django/apps/registry.py", line 124, in check_apps_ready
    raise AppRegistryNotReady("Apps aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.

我知道INSTALLED_APPS已从元组更改为列表。

还有什么我可能想念的吗？

恩普

尝试升级django-reversion，今天发布了1.10版，其中包括：

Django 1.9兼容性（@etianen）。

来自讨论组的消息https://groups.google.com/forum/#!topic/django-reversion/3AQipnbKaUI

django-reversion（1.10.0）的最新版本现已在GitHub和PyPi上提供。此版本增加了与Django 1.9的兼容性。

重要：此版本包含重大更改。在安装之前，请查看GitHub上的发行说明。

不幸的是，为了支持Django 1.9，需要进行这些重大更改。幸运的是，您只需要做的就是修改您的版本导入位置，一切将继续进行。

祝您编码愉快！

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