Django项目运行报错Apps aren't loaded yet

Question

我几乎查遍了网上所有有关这个报错的解决办法，全部都不行。求老哥们帮帮我，我真的要疯了。

下面是详细报错信息：

Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x0000000004C5AD90>
Traceback (most recent call last):
  File "E:\MyProgram\Anaconda\lib\site-packages\django\utils\autoreload.py", line 225, in wrapper
    fn(*args, **kwargs)
  File "E:\MyProgram\Anaconda\lib\site-packages\django\core\management\commands\runserver.py", line 113, in inner_run
    autoreload.raise_last_exception()
  File "E:\MyProgram\Anaconda\lib\site-packages\django\utils\autoreload.py", line 248, in raise_last_exception
    raise _exception[1]
  File "E:\MyProgram\Anaconda\lib\site-packages\django\core\management\__init__.py", line 327, in execute
    autoreload.check_errors(django.setup)()
  File "E:\MyProgram\Anaconda\lib\site-packages\django\utils\autoreload.py", line 225, in wrapper
    fn(*args, **kwargs)
  File "E:\MyProgram\Anaconda\lib\site-packages\django\__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "E:\MyProgram\Anaconda\lib\site-packages\django\apps\registry.py", line 89, in populate
    app_config = AppConfig.create(entry)
  File "E:\MyProgram\Anaconda\lib\site-packages\django\apps\config.py", line 90, in create
    module = import_module(entry)
  File "E:\MyProgram\Anaconda\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 941, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "E:\MyProgram\Anaconda\lib\site-packages\django\contrib\admin\models.py", line 5, in <module>
    from django.contrib.contenttypes.models import ContentType
  File "E:\MyProgram\Anaconda\lib\site-packages\django\contrib\contenttypes\models.py", line 134, in <module>
    class ContentType(models.Model):
  File "E:\MyProgram\Anaconda\lib\site-packages\django\db\models\base.py", line 100, in __new__
    app_config = apps.get_containing_app_config(module)
  File "E:\MyProgram\Anaconda\lib\site-packages\django\apps\registry.py", line 244, in get_containing_app_config
    self.check_apps_ready()
  File "E:\MyProgram\Anaconda\lib\site-packages\django\apps\registry.py", line 127, in check_apps_ready
    raise AppRegistryNotReady("Apps aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.

在PyCharm里运行这个Django项目，就是运行不了，出上面的错误。但是我换成我之前写的别的Django项目都没问题。

这个项目本来也是能运行的，我引入xadmin就不行了，一直出这个错。

我在StackOverflow上找到了类似的问题：
https://stackoverflow.com/que...

但是我还是不清楚该怎么修正这个问题。

我的Django版本是2.0，下面是我的settings：

"""
Django settings for MxShop_Back project.

Generated by 'django-admin startproject' using Django 2.1.

For more information on this file, see
https://docs.djangoproject.com/en/2.1/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/2.1/ref/settings/
"""

import os
import sys

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

# 设置搜索app的路径
sys.path.insert(0, BASE_DIR)
sys.path.insert(0, os.path.join(BASE_DIR, "apps"))
sys.path.insert(0, os.path.join(BASE_DIR, "extra_apps"))

# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.1/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = '77@0n19n67bs_8e-n6g%s&nfu(wl5h4-^pqadi9a+bf3e*!u@a'

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = []

# 替换Django默认的用户模型
AUTH_USER_MODEL = 'users.UserProfile'

# Application definition

INSTALLED_APPS = [
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'rest_framework',
    'DjangoUeditor',
    'users.apps.UsersConfig',
    'goods.apps.GoodsConfig',
    'trade.apps.TradeConfig',
    'user_operations.apps.UserOperationsConfig',
    'crispy_forms',
    'xadmin',
    'django.contrib.admin.models.LogEntry',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

ROOT_URLCONF = 'MxShop_Back.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, 'templates')]
        ,
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'MxShop_Back.wsgi.application'

# Database
# https://docs.djangoproject.com/en/2.1/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'mxshop',
        'USER': 'root',
        'PASSWORD': '3838438',
        'HOST': '127.0.0.1',
        'OPTIONS': {'init_command': 'SET default_storage_engine=INNODB;'}
    }
}

# Password validation
# https://docs.djangoproject.com/en/2.1/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]

# Internationalization
# https://docs.djangoproject.com/en/2.1/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True

# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/2.1/howto/static-files/

STATIC_URL = '/static/'

Answer 1

问题已经解决，记录下解决方法：

首先需要在url.py中添加自动注册models：

from xadmin.plugins import xversion

# model自动注册
xadmin.autodiscover()
xversion.register_models()

然后需要确保下面这个app是注册了的：

'django.contrib.admin',

另外还有三个XAdmin必备的app，这个都不会忘，重点是上面这个，如果PyCharm建立Django工程时候不要admin管理，就不会自带这个。

其余配置参考：Django集成Xadmin

另外还有一件事，编写adminx.py时，里面的模块导入一定要写全称，不能用.models这样的方式，这也是一个重要的容易出错的问题，参考此处。