Django：“没有安装带有标签‘flatpages’的应用程序。”使用 django-markdown

Question

我正在尝试向我的 Django 网站添加一个功能，该功能实现了管理员使用一些降价编写的文章。

我安装了 django-markdown，并按照本教程进行操作： http://pythonhosted.org/django-markdown/

我 makemigrations/migrate 和 runserver 并成功访问了我的网站，但是当我尝试访问管理界面时，我遇到了一个问题： No installed app with label 'flatpages'.

这是我的 requirements.txt 的内容：

Django==1.7.5
django-markdown==0.8.4
Markdown==2.6
wheel==0.24.0

我假设它是来自 django_markdown 模块的平面页面。 我尝试了一些事情，例如将“平面页面”添加到 INSTALLED_APPS。但这并不能解决问题（并且“django_markdown”已经在其中）。 我对 django 的经验不足，无法理解我的项目中发生了什么，我需要一些帮助来理解这个问题。 有人可以帮帮我吗？

以下是一些可能有用的附加信息和文件：

错误：

Environment:


Request Method: GET
Request URL: http://localhost:8000/admin/

Django Version: 1.7.5
Python Version: 2.7.3
Installed Applications:
('django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django_markdown',
 'main')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware')


Traceback:
File "/home/vmonteco/Envs/django/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  111.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/vmonteco/Envs/django/local/lib/python2.7/site-packages/django/contrib/admin/sites.py" in wrapper
  227.                 return self.admin_view(view, cacheable)(*args, **kwargs)
File "/home/vmonteco/Envs/django/local/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view
  105.                     response = view_func(request, *args, **kwargs)
File "/home/vmonteco/Envs/django/local/lib/python2.7/site-packages/django/views/decorators/cache.py" in _wrapped_view_func
  52.         response = view_func(request, *args, **kwargs)
File "/home/vmonteco/Envs/django/local/lib/python2.7/site-packages/django/contrib/admin/sites.py" in inner
  206.             return view(request, *args, **kwargs)
File "/home/vmonteco/Envs/django/local/lib/python2.7/site-packages/django/views/decorators/cache.py" in _wrapped_view_func
  52.         response = view_func(request, *args, **kwargs)
File "/home/vmonteco/Envs/django/local/lib/python2.7/site-packages/django/contrib/admin/sites.py" in index
  401.                             'name': apps.get_app_config(app_label).verbose_name,
File "/home/vmonteco/Envs/django/local/lib/python2.7/site-packages/django/apps/registry.py" in get_app_config
  150.             raise LookupError("No installed app with label '%s'." % app_label)

Exception Type: LookupError at /admin/
Exception Value: No installed app with label 'flatpages'.

hypnose/settings.py：

"""
Django settings for hypnose project.

For more information on this file, see
https://docs.djangoproject.com/en/1.7/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/1.7/ref/settings/
"""


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


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/1.7/howto/deployment/checklist/

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

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

TEMPLATE_DEBUG = True

ALLOWED_HOSTS = []

# Template dirs.
TEMPLATE_DIRS = [
    os.path.join(BASE_DIR, 'templates'),
]

# Static dirs.
STATICFILES_DIRS = (
    os.path.join(BASE_DIR, "static"),
)

#Email settings

#markdown flatpages
# import django_markdown
MARKDOWN_EDITOR_SKIN = 'simple'

# Application definition

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django_markdown',
    # 'django.contrib.flatpages',
    #'django_markdown.flatpages',
    'main',
)

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

ROOT_URLCONF = 'hypnose.urls'

WSGI_APPLICATION = 'hypnose.wsgi.application'


# Database
# https://docs.djangoproject.com/en/1.7/ref/settings/#databases

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

# Internationalization
# https://docs.djangoproject.com/en/1.7/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/1.7/howto/static-files/

STATIC_URL = '/static/'

hypnose/urls.py：

from django.conf.urls import patterns, include, url
from django.contrib import admin
from django_markdown import flatpages

admin.autodiscover()
flatpages.register()

urlpatterns = patterns('',
    url(r'^admin/', include(admin.site.urls)),
    url('^markdown/', include('django_markdown.urls')),
    url(r'^', include('main.urls')),
)

ma​​in/admin.py：

from django.contrib import admin
from main.models import Article
from django_markdown.admin import MarkdownModelAdmin

admin.site.register(Article, MarkdownModelAdmin)

ma​​in/models.py

from django.db import models
from django_markdown.models import MarkdownField
from django_markdown.widgets import MarkdownWidget
from django import forms
from django.forms.widgets import *

class Article(models.Model):
    title = models.CharField(max_length = 100)
    # I just changed content from forms.CharField to MarkdownField
    # because this field wasn't appearing in
    # my admin pannel.
    # content = forms.CharField(required = False, widget=MarkdownWidget())
    content = MarkdownField(null = True)
    date = models.DateTimeField(auto_now_add = True, auto_now = False, verbose_name = "Date de parution")
    slug = models.SlugField(max_length = 50)

    def __unicode__(self):
        return (u"%s" % (self.title,))

    def __str__(self):
        return ("%s" % (self.title,))

可能是什么，我该怎么办？
谢谢您的帮助。 :)

编辑： 问题已解决，但要解释模板中的降价，我还必须安装 django-markdown-deux :
https://github.com/trentm/django-markdown-deux

Answer 1

平面应用程序是part of Django。您需要正确安装它。来自官方安装文档：

要安装 flatpages 应用，请按以下步骤操作：

1. 如果尚未在其中添加 'django.contrib.sites' 到您的 INSTALLED_APPS 设置，则安装站点框架。

还要确保您已将SITE_ID 正确设置为设置文件所代表的站点的ID。这通常是1（即SITE_ID = 1，但如果您使用站点框架来管理多个站点，它可能是不同站点的 ID。

1. 将'django.contrib.flatpages' 添加到您的INSTALLED_APPS 设置中。然后：

   (a) 在您的 URLconf 中添加一个条目。例如：

urlpatterns = patterns('',
    (r'^pages/', include('django.contrib.flatpages.urls')),
)

或 (b) 将 'django.contrib.flatpages.middleware.FlatpageFallbackMiddleware' 添加到您的 MIDDLEWARE_CLASSES 设置中。

1. 运行命令manage.py migrate。