Django 1.8 AttributeError：模块没有属性“ URL”

Question

我当时正在做一个展示“你好，世界！”的练习，但是当我打开网站时，django给出了一个例外。该如何解决该问题？

例外是：

AttributeError at /
module 'apps.release_news' has no attribute 'urls'
Request Method: GET
Request URL:    http://127.0.0.1:8000/
Django Version: 1.8.7
Exception Type: AttributeError
Exception Value:    
module 'apps.release_news' has no attribute 'urls'
Exception Location: C:\software\development\PythonProject\DemoGuitarProject\DemoGuitarProject\urls.py in <module>, line 24
Python Executable:  C:\software\development\python3.5\python.exe
Python Version: 3.5.0
Python Path:    
['C:\\software\\development\\PythonProject\\DemoGuitarProject',
 'C:\\software\\development\\PythonProject\\DemoGuitarProject',
 'C:\\software\\development\\python3.5\\python35.zip',
 'C:\\software\\development\\python3.5\\DLLs',
 'C:\\software\\development\\python3.5\\lib',
 'C:\\software\\development\\python3.5',
 'C:\\software\\development\\python3.5\\lib\\site-packages']
Server time:    Wed, 2 Dec 2015 15:49:02 +0800

我的项目结构是：

DemoGuitarProject
  __init__.py
  settings.py
  urls.py
  wsgi.py
apps
  release_news
    __init__.py
    admin.py
    models.py
    tests.py
    urls.py
    views.py
  __init__.py
templates
...

我在DemoGuitarProject目录中的urls.py是：

from django.conf.urls import include, url
from django.contrib import admin

from apps import release_news

urlpatterns = [
    url(r'^admin/', include(admin.site.urls)),
    url(r'^release_news/', include(release_news.urls)), 
]

我在应用程序目录release_news中的urls.py是：

from django.conf.urls import include, url

from apps.release_news import views

__author__ = 'Kami Wan'

urlpatterns = [

    url(r'^$', views.index, name='index'),                      
    url(r'^summernote/', include('django_summernote.urls')),  
]

我的views.py文件是：

# Create your views here.
from django.http import HttpResponse


def index(request):
    return HttpResponse("Hello world ! ")

我的settings.py文件：

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
import os

BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/1.8/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'xxxxxx'

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

ALLOWED_HOSTS = []

# Application definition

INSTALLED_APPS = (
    'suit',  # admin theme plugin
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'apps.release_news',  # release news
    'django_summernote',  # RTE plugin
)

MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'django.middleware.security.SecurityMiddleware',
)

ROOT_URLCONF = 'DemoGuitarProject.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 = 'DemoGuitarProject.wsgi.application'

# Database
# https://docs.djangoproject.com/en/1.8/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}

# Internationalization
# https://docs.djangoproject.com/en/1.8/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'Asia/Shanghai'

USE_I18N = True

USE_L10N = True

USE_TZ = True

# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/1.8/howto/static-files/

STATIC_URL = '/static/'

# --------------------------------------------user setting area---------------------------------------------------------

# choose a settings file to use
os.environ['DJANGO_SETTINGS_MODULE'] = 'DemoGuitarProject.settings'

# set the directory for uploading
MEDIA_URL = "upload/"
MEDIA_ROOT = os.path.join(BASE_DIR, "upload")

# TEMPLATE zh_CN
FILE_CHARSET = "utf-8"
DEFAULT_CHARSET = 'utf-8'

Answer 1

来自DemoGuitarProject/urls.py代码

from apps import release_news

读取文件apps/release_news/__init__.py

我猜这个文件是空的。 添加到此文件：

from apps.release_news import urls

或更改DemoGuitarProject/urls.py

from apps.release_news import urls as release_news_urls

urlpatterns = [
    url(r'^admin/', include(admin.site.urls)),
    url(r'^release_news/', include(release_news_urls)), 
]