Django:无法设置app ready()来导入信号

Question

我正在点击常见的"模型尚未加载"错误,这个错误来自于导入我的应用程序的单独信号文件models.py.我找到了2个关于如何创建AppConfig并在ready()函数中导入信号的简单指南,但我无法使其工作.我正在使用这里的顶部答案以及此博客文章.

部分原因可能是因为我的整个项目都有一个名称,funproj并且大部分代码所在的主应用程序被有效地调用app- 我正在使用Visual Studio和Python Tools for VS并且它生成了这个结构当我创建项目时.这是层次结构:

funproj
|--- __init__.py
|--- setttings.py
|--- urls.py
|
|--app
|   |--- __init__.py
|   |--- models.py
|   |--- signals.py
|
|--otherapp
|   |--- __init__.py
|   |--- other stuff

这是缩写,但我已尝试在两者之下放置所需的apps.py相关代码,但两种方法都不起作用.这就是我对每一个人的看法:__init.py__funprojapp

apps.py

from django.apps import AppConfig

class FunProjAppConfig(AppConfig):
  name = 'app'

  def ready(self):
    from app import signals

__init.py__补充

#import signals in the app config
default_app_config = 'app.apps.FunProjAppConfig'

app因为它包含了需要加载的信号,所以有了这个代码对我来说更有意义,但是我链接的例子对我来说并不清楚.一个人提到'app目录',但我不确定这是否真的意味着app,或者他们是否正在使用app作为项目的同义词.

我认为这不会很难解决,我只是无法弄清楚我做错了什么.

编辑:这是使用Django 1.8的Python 3.4.下面的回溯,当我只是有一个signals.py文件和那些信号的`models.py'导入时,我得到了同样的错误.

C:\Python34\lib\importlib\_bootstrap.py:321: RemovedInDjango19Warning: The utili
ties in django.db.models.loading are deprecated in favor of the new application
loading system.
  return f(*args, **kwds)

Traceback (most recent call last):
  File "C:\Users\David\Source\Repos\path\to\projfiles\manage.py", line
17, in <module>
    execute_from_command_line(sys.argv)
  File "C:\Python34\lib\site-packages\django\core\management\__init__.py", line
338, in execute_from_command_line
    utility.execute()
  File "C:\Python34\lib\site-packages\django\core\management\__init__.py", line
312, in execute
    django.setup()
  File "C:\Python34\lib\site-packages\django\__init__.py", line 18, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "C:\Python34\lib\site-packages\django\apps\registry.py", line 108, in pop
ulate
    app_config.import_models(all_models)
  File "C:\Python34\lib\site-packages\django\apps\config.py", line 198, in impor
t_models
    self.models_module = import_module(models_module_name)
  File "C:\Python34\lib\importlib\__init__.py", line 109, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 2254, in _gcd_import
  File "<frozen importlib._bootstrap>", line 2237, in _find_and_load
  File "<frozen importlib._bootstrap>", line 2226, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 1200, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 1129, in _exec
  File "<frozen importlib._bootstrap>", line 1471, in exec_module
  File "<frozen importlib._bootstrap>", line 321, in _call_with_frames_removed
  File "C:\Users\David\Source\Repos\path\to\projfiles\app\models.py", l
ine 11, in <module>
    from app import signals
  File "C:\Users\David\Source\Repos\path\to\projfiles\app\signals.py",
line 7, in <module>
    @receiver(post_save, sender=get_model('app', 'Game'))
  File "C:\Python34\lib\site-packages\django\apps\registry.py", line 199, in get
_model
    self.check_models_ready()
  File "C:\Python34\lib\site-packages\django\apps\registry.py", line 131, in che
ck_models_ready
    raise AppRegistryNotReady("Models aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet.

EDIT2:我print在ready()函数中添加了一个但没有看到输出.以下是我安装的应用:

INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.sites',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'kombu.transport.django',
    'accounts',
    'app',
    'scores',
    'rest_framework',
    'rest_framework.authtoken',
    'rest_auth',
    # Uncomment the next line to enable the admin:
     'django.contrib.admin',
    # Uncomment the next line to enable admin documentation:
    # 'django.contrib.admindocs',
)

Answer 1

看起来你有两个apps.py并models.py导入你的信号.何时models.py加载signals,然后导入然后尝试引用您的Game模型,导致"模型尚未加载"错误.

取出from app import signals从models.py.您可以从中导入models,signals但不能导入其他方式.