Django: 无标签为"flatpages"的已安装应用。具有django-markdown。

Question

我试图在我的Django网站上添加一个功能，它实现了一个管理员写的带有一点降价的文章。

我安装了django markdown，并遵循本教程： http://pythonhosted.org/django-markdown/

我进行迁移/迁移并运行服务器，我成功地访问了我的网站，但是当我尝试访问管理界面时，我遇到一个问题，说： No installed app with label 'flatpages'.

以下是my requirements.txt的内容：

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

我假设是django_markdown模块的flatpages。 我尝试了一些方法，比如在已安装的应用程序中添加“flatpages”。但这并不能解决问题（django_markdown已经在其中了）。 我对django没有足够的经验来理解我的项目中发生的事情，我需要一些帮助来理解这个问题。 有人能帮我吗？

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/url.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')),
)

main/admin.py:

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

admin.site.register(Article, MarkdownModelAdmin)

main/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，我能做什么？
谢谢你的帮助。：）

编辑： 问题解决了，但要解释模板中的标记，我还必须安装django markdown deux：
https://github.com/trentm/django-markdown-deux