django-cms中的插件上下文处理器

我正在尝试为我的钩子应用程序获取django cms的插件上下文处理器。我按照文档http://docs.django-cms.org/en/2.1.3/extending_cms/custom_plugins.html#plugin-context-processors，但由于某种原因它不起作用。这是我的示例上下文处理器：

def test_context_processor(instance, placeholder):
    print instance
    return {'testkey':'testvalue'}

和我的模板：

{% load cms_tags %}

<!doctype html>
<head>
  <title></title>
    {% plugins_media %}
</head>

<body>

{% placeholder "main" %}

</body>
</html>

我在主占位符中添加了一个文本插件，并添加了文本{{testkey}}。它将其呈现为{{testkey}}而不是testvalue。上下文处理器中的print语句被正确记录 - 这意味着肯定会调用上下文处理器。我不确定我在这里做错了什么。 ---编辑--- 我的设置文件：

# -*- coding: utf-8 -*-
import os

gettext = lambda s: s

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

DEBUG = True
TEMPLATE_DEBUG = DEBUG

ADMINS = (
    # ('Your Name', 'your_email@domain.com'),
)

MANAGERS = ADMINS

LANGUAGES = [('en', 'en')]
DEFAULT_LANGUAGE = 0

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

DATABASE_ENGINE = 'postgresql_psycopg2'           # 'postgresql_psycopg2', 'postgresql', 'mysql', 'sqlite3' or 'oracle'.
DATABASE_NAME = '***'     # Or path to database file if using sqlite3.
DATABASE_USER = '***'             # Not used with sqlite3.
DATABASE_PASSWORD = '***'         # Not used with sqlite3.
DATABASE_HOST = ''             # Set to empty string for localhost. Not used with sqlite3.
DATABASE_PORT = '5432'             # Set to empty string for default. Not used with sqlite3.

# Local time zone for this installation. Choices can be found here:
# http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
# although not all choices may be available on all operating systems.
# On Unix systems, a value of None will cause Django to use the same
# timezone as the operating system.
# If running in a Windows environment this must be set to the same as your
# system time zone.
TIME_ZONE = 'America/Chicago'

# Language code for this installation. All choices can be found here:
# http://www.i18nguy.com/unicode/language-identifiers.html
LANGUAGE_CODE = 'en-us'

SITE_ID = 1

# If you set this to False, Django will make some optimizations so as not
# to load the internationalization machinery.
USE_I18N = True

# If you set this to False, Django will not format dates, numbers and
# calendars according to the current locale
USE_L10N = True

# Absolute filesystem path to the directory that will hold user-uploaded files.
# Example: "/home/media/media.lawrence.com/"
MEDIA_ROOT = os.path.join(PROJECT_DIR, 'media')

# URL that handles the media served from MEDIA_ROOT. Make sure to use a
# trailing slash if there is a path component (optional in other cases).
# Examples: "http://media.lawrence.com", "http://example.com/media/"
MEDIA_URL = '/media/'

# URL prefix for admin media -- CSS, JavaScript and images. Make sure to use a
# trailing slash.
# Examples: "http://foo.com/media/", "/media/".
ADMIN_MEDIA_PREFIX = '/media/admin/'

# Make this unique, and don't share it with anybody.
SECRET_KEY = '0r6%7gip5tmez*vygfv+u14h@4lbt^8e2^26o#5_f_#b7%cm)u'

# List of callables that know how to import templates from various sources.
TEMPLATE_LOADERS = (
    'django.template.loaders.filesystem.Loader',
    'django.template.loaders.app_directories.Loader',
)

MIDDLEWARE_CLASSES = (
    'django.middleware.common.CommonMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'cms.middleware.page.CurrentPageMiddleware',
    'cms.middleware.user.CurrentUserMiddleware',
    'cms.middleware.toolbar.ToolbarMiddleware',
    'cms.middleware.media.PlaceholderMediaMiddleware',
)

TEMPLATE_CONTEXT_PROCESSORS = (
    'django.core.context_processors.auth',
    'django.core.context_processors.i18n',
    'django.core.context_processors.request',
    'django.core.context_processors.media',
    'cms.context_processors.media',
)

CMS_PLUGIN_CONTEXT_PROCESSORS = (
    'helpdocs.cms_context_processors.test_context_processor',
)

CMS_TEMPLATES = (
    ('example.html', 'Example Template'),
)

ROOT_URLCONF = 'urls'

TEMPLATE_DIRS = (
    os.path.join(PROJECT_DIR, 'templates'),
)

INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.sites',
    'django.contrib.messages',
    'django.contrib.admin',
    'cms',
    'menus',
    'mptt',
    'appmedia',
    'south',
    'cms.plugins.text',
    'cms.plugins.picture',
    'cms.plugins.link',
    'cms.plugins.file',
    'cms.plugins.snippet',
    'cms.plugins.googlemap',
    'helpdocs',
)

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梆晨灸碾

插件上下文处理器用于处理用于呈现插件模板的上下文。它们不会改变任何数据库字段的内容（在您的情况下，Text模型上的“body”）。因此，它不会替换文本插件中的任何内容。要做你想做的事，看看插件处理器（http://docs.django-cms.org/en/2.1.3/extending_cms/custom_plugins.html#plugin-processors），它们允许你处理渲染的插件输出。为了达到你想要做的，你会做这样的事情：

def my_plugin_processor(instance, placeholder, rendered_content, original_context):
    return rendered_content.replace('{{ testkey }}', 'testvalue')

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django-cms中的插件上下文处理器

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