Python 2.7 '；过滤器表达式'；对象没有属性'；价值'；

我正在从Django 1.8.17迁移到1.11.21。我重新安装了所有兼容的软件包，并做了必要的代码更改。但它仍然给出了“'FilterExpression'对象没有属性'value'”错误，我被卡住了

它应该呈现页面模板。该问题与占位符有关

下面是截图

这是完整的跟踪

    Environment:


Request Method: GET
Request URL: http://127.0.0.1:8000/

Django Version: 1.11.21
Python Version: 2.7.15
Installed Applications:
['django.contrib.contenttypes',
 'djangocms_admin_style',
 'admin_shortcuts',
 'django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.sessions',
 'django.contrib.staticfiles',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.redirects',
 'django.contrib.humanize',
 'test_without_migrations',
 'django_nose',
 'raven.contrib.django.raven_compat',
 'waffle',
 'easy_thumbnails',
 'django_extensions',
 'addendum',
 'sorl.thumbnail',
 'treebeard',
 'mptt',
 'embed_video',
 'filer',
 'menus',
 'sekizai',
 'djangocms_text_ckeditor',
 'cms',
 'taggit',
 'taggit_labels',
 'compressor',
 'typogrify',
 'cmsplugin_filer_image',
 'cmsplugin_filer_file',
 'cmsplugin_filer_folder',
 'cmsplugin_filer_teaser',
 'cmsplugin_filer_video',
 'djangocms_teaser',
 'djangocms_link',
 'attachments',
 'video',
 'images',
 'meta',
 'sortedm2m',
 'tags',
 'formassembly',
 'locations',
 'maps',
 'profiles',
 'authors',
 'content',
 'blog',
 'news',
 'press',
 'funders',
 'issues',
 'statistics',
 'events',
 'partners',
 'stories',
 'results',
 'homepage_billboard',
 'takeovers',
 'publications',
 'financials',
 'careers',
 'feedback',
 'icontact',
 'user',
 'slideshow',
 'navigation',
 'redesign',
 'core',
 'extended_cms',
 'strata',
 'embeds',
 'carousel',
 'matchinggifts',
 'socialmedia',
 'media',
 'cms_navigation',
 'cms_containers',
 'cms_content',
 'cms_media',
 'cms_meta',
 'cms_posters',
 'cms_headers',
 'cms_model',
 'styleguide']
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.redirects.middleware.RedirectFallbackMiddleware',
 'geolocation.middleware.LocationMiddleware',
 'waffle.middleware.WaffleMiddleware',
 'cms.middleware.page.CurrentPageMiddleware',
 'cms.middleware.user.CurrentUserMiddleware',
 'cms.middleware.toolbar.ToolbarMiddleware',
 'cms.middleware.language.LanguageCookieMiddleware')


Template error:
In template /var/apps/cis_national/cis/app/templates/_2017/site/base.html, error at line 119
   'FilterExpression' object has no attribute 'value'   109 :             <a class="masthead-home" href="/" target="_top" o-base="mod--balance">
   110 :               <h2 class="vx--a11y">Communities In Schools</h2>
   111 :               <picture>
   112 :                 <source srcset="{% static '_2017/res/logo.landscape.png.webp' %}" type="image/webp">
   113 :                 <img class="site-logo" src="{% static '_2017/res/logo.landscape.png' %}" style="max-width: 50vw">
   114 :               </picture>
   115 :             </a>
   116 :           </div>
   117 :       </header>
   118 :       <div class="site-content" o-base="col--pStart mod--balance ord--next">
   119 :          {% placeholder "preview" %} 
   120 :         <main o-base="col--pStart mod--balance">{% placeholder "view" %}
   121 :         </main>{% get_placeholder "postview" as postview %}
   122 : 
   123 : {% if postview %}{% load static cms_tags extended_cms %}
   124 :               <aside class="strata--prefooter thm--texture-alt" o-condensed="matrix--pMiddle--sFull" o-base="col--pStart dm--xFull pos--rel pad--x50 pad--y100 rhy--yStart100" o-compressed="pad--x75 pad--y200" o-enhanced="pad--x100" o-extended="pad--y400">{{ postview }}
   125 :                     {% for plugin in instance.child_plugin_instances %}
   126 :                     {% render_plugin plugin %}
   127 :                     {% endfor %}
   128 : 
   129 : 


Traceback:

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/core/handlers/exception.py" in inner
  41.             response = get_response(request)

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/core/handlers/base.py" in _legacy_get_response
  249.             response = self._get_response(request)

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
  217.                 response = self.process_exception_by_middleware(e, request)

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
  215.                 response = response.render()

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/template/response.py" in render
  107.             self.content = self.rendered_content

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/template/response.py" in rendered_content
  84.         content = template.render(context, self._request)

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/template/backends/django.py" in render
  66.             return self.template.render(context)

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/template/base.py" in render
  207.                     return self._render(context)

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/template/base.py" in _render
  199.         return self.nodelist.render(context)

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/template/base.py" in render
  990.                 bit = node.render_annotated(context)

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/template/base.py" in render_annotated
  957.             return self.render(context)

File "/usr/local/venv/cis/lib/python2.7/site-packages/classytags/core.py" in render
  146.         return self.render_tag(context, **kwargs)

File "/usr/local/venv/cis/lib/python2.7/site-packages/sekizai/templatetags/sekizai_tags.py" in render_tag
  83.         rendered_contents = nodelist.render(context)

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/template/base.py" in render
  990.                 bit = node.render_annotated(context)

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/template/base.py" in render_annotated
  957.             return self.render(context)

File "/usr/local/venv/cis/lib/python2.7/site-packages/classytags/core.py" in render
  146.         return self.render_tag(context, **kwargs)

File "/usr/local/venv/cis/lib/python2.7/site-packages/sekizai/templatetags/sekizai_tags.py" in render_tag
  83.         rendered_contents = nodelist.render(context)

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/template/base.py" in render
  990.                 bit = node.render_annotated(context)

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/template/base.py" in render_annotated
  957.             return self.render(context)

File "/usr/local/venv/cis/lib/python2.7/site-packages/classytags/core.py" in render
  146.         return self.render_tag(context, **kwargs)

File "/usr/local/venv/cis/lib/python2.7/site-packages/cms/templatetags/cms_tags.py" in render_tag
  448.         return nodelist.render(context)

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/template/base.py" in render
  990.                 bit = node.render_annotated(context)

File "/usr/local/venv/cis/lib/python2.7/site-packages/django/template/base.py" in render_annotated
  957.             return self.render(context)

File "/usr/local/venv/cis/lib/python2.7/site-packages/classytags/core.py" in render
  146.         return self.render_tag(context, **kwargs)

File "/usr/local/venv/cis/lib/python2.7/site-packages/cms/templatetags/cms_tags.py" in render_tag
  313.                 nodelist=nodelist,

File "/usr/local/venv/cis/lib/python2.7/site-packages/cms/plugin_rendering.py" in render_page_placeholder
  329.             self._preload_placeholders_for_page(current_page)

File "/usr/local/venv/cis/lib/python2.7/site-packages/cms/plugin_rendering.py" in _preload_placeholders_for_page
  497.             placeholders = page.rescan_placeholders().values()

File "/usr/local/venv/cis/lib/python2.7/site-packages/cms/models/pagemodel.py" in rescan_placeholders
  1591.         placeholders = [pl.slot for pl in self.get_declared_placeholders()]

File "/usr/local/venv/cis/lib/python2.7/site-packages/cms/models/pagemodel.py" in get_declared_placeholders
  1606.         return get_placeholders(self.get_template())

File "/usr/local/venv/cis/lib/python2.7/site-packages/cms/utils/placeholder.py" in get_placeholders
  250.         placeholder = node.get_declaration()

File "/usr/local/venv/cis/lib/python2.7/site-packages/cms/templatetags/cms_tags.py" in get_declaration
  324.         slot = self.kwargs['name'].var.value.strip('"').strip("'")

Exception Type: AttributeError at /
Exception Value: 'FilterExpression' object has no attribute 'value'

环境：
请求方法：获取
请求URL:http://127.0.0.1:8000/
Django版本：1.11.21
Python版本：2.7.15
已安装的应用程序：
['django.contrib.contenttypes'，
“Djangoms_管理风格”，
“管理快捷方式”，
“django.contrib.admin”，
“django.contrib.auth”，
“django.contrib.sessions”，
“django.contrib.staticfiles”，
“django.contrib.sites”，
“django.contrib.messages”，
'django.contrib.redirects'，
“django.contrib.humanize”，
“不进行迁移的测试”，
“django_nose”，
“raven.contrib.django.raven_compat”，
“华夫饼”，
“简易缩略图”，
“django_扩展”，
“附录”，
“Soll.缩略图”，
“树羚”，
“mptt”，
“嵌入视频”，
“文件管理器”，
“菜单”，
“sekizai”，
“djangocms_text_ckeditor”，
“cms”，
“塔吉特”，
“taggit_标签”，
“压缩机”，
“字体美化”，
“cmsplugin\u文件服务器\u映像”，
“cmsplugin\u文件管理器\u文件”，
“cmsplugin\u文件管理器\u文件夹”，
“cmsplugin\u文件管理器\u摘要”，
“cmsplugin\u文件服务器\u视频”，
“Djangoms_Triser”，
“Djangoms_链接”，
“附件”，
“视频”，
“图像”，
“元”，
“分类DM2M”，
“标签”，
“正式组装”，
"地点",，
“地图”，
"简介",，
“作者”，
“内容”，
“博客”，
"新闻",，
"按",，
“资助者”，
“问题”，
"统计",，
“事件”，
“合伙人”，
“故事”，
“结果”，
“主页广告牌”，
“收购”，
"刊物",，
"金融",，
“职业”，
“反馈”，
“icontact”，
“用户”，
“幻灯片放映”，
“导航”，
“重新设计”，
“核心”，
“扩展_cms”，
“地层”，
“嵌入”，
“旋转木马”，
“相配礼物”，
“社交媒体”，
"媒体",，
“cms_导航”，
“cms_容器”，
“cms_内容”，
“cms_媒体”，
“cms_meta”，
“cms_海报”，
“cms_头文件”，
“cms_模型”，
'样式指南']
已安装的中间件：
（'django.contrib.sessions.middleware.SessionMiddleware'，
'django.middleware.common.CommonMiddleware'，
'django.contrib.auth.middleware.AuthenticationMiddleware'，
'django.contrib.messages.middleware.MessageMiddleware'，
“django.middleware.csrf.CsrfViewMiddleware”，
'django.contrib.redirects.middleware.RedirectFallbackMiddleware'，
“geolocation.middleware.LocationMiddleware”，
'waffle.middleware.WaffleMiddleware'，
“cms.middleware.page.CurrentPageMiddleware”，
'cms.middleware.user.CurrentUserMiddleware'，
“cms.middleware.toolbar.ToolbarMiddleware”，
'cms.middleware.language.LanguageCookieMiddleware'）
模板错误：
在template/var/apps/cis_national/cis/app/templates/_2017/site/base.html中，第119行出现错误
“FilterExpression”对象没有属性“value”109：
116 :           
117 :       
118 :       
119:{%占位符“预览”%}
120:{%占位符“视图”%}
121:{%get_占位符“postview”作为postview%}
122 : 
123:{%if postview%}{%load静态cms\u扩展标记\u cms%}
124:{{postview}
125:{instance.child_plugin_instances%}
126:{%render_插件%}
127:{%endfor%}
128 : 
129 : 
回溯：
文件“/usr/local/venv/cis/lib/python2.7/site packages/django/core/handlers/exception.py”
41响应=获取响应（请求）
文件“/usr/local/venv/cis/lib/python2.7/site-packages/django/core/handlers/base.py”位于\u legacy\u get\u响应中
249响应=自我。获取响应（请求）
文件“/usr/local/venv/cis/lib/python2.7/site-packages/django/core/handlers/base.py”在\u get\u响应中
217response=self.process\u异常\u由\u中间件（e，请求）
文件“/usr/local/venv/cis/lib/python2.7/site-packages/django/core/handlers/base.py”在\u get\u响应中
215response=response.render（）
render中的文件“/usr/local/venv/cis/lib/python2.7/site packages/django/template/response.py”
107self.content=自渲染内容
呈现内容中的文件“/usr/local/venv/cis/lib/python2.7/site packages/django/template/response.py”
84content=template.render（上下文、self.\u请求）
render中的文件“/usr/local/venv/cis/lib/python2.7/site packages/django/template/backends/django.py”
66返回self.template.render（上下文）
render中的文件“/usr/local/venv/cis/lib/python2.7/site packages/django/template/base.py”
207返回self.\u呈现（上下文）
文件“/usr/local/venv/cis/lib/python2.7/site packages/django/template/base.py”位于
199返回self.nodelist.render（上下文）
render中的文件“/usr/local/venv/cis/lib/python2.7/site packages/django/template/base.py”
990位=节点。带注释的渲染（上下文）
render_注释中的文件“/usr/local/venv/cis/lib/python2.7/site packages/django/template/base.py”
957返回self.render（上下文）
render中的文件“/usr/local/venv/cis/lib/python2.7/site packages/classytags/core.py”
146返回self.render_标记（上下文，**kwargs）
render_标记中的文件“/usr/local/venv/cis/lib/python2.7/site packages/sekizai/templatetags/sekizai_tags.py”
83呈现内容=节点列表。呈现（上下文）
render中的文件“/usr/local/venv/cis/lib/python2.7/site packages/django/template/base.py”
990位=节点。带注释的渲染（上下文）
render_注释中的文件“/usr/local/venv/cis/lib/python2.7/site packages/django/template/base.py”
957返回self.render（上下文）
render中的文件“/usr/local/venv/cis/lib/python2.7/site packages/classytags/core.py”
146返回self.render_标记（上下文，**kwargs）
render_标记中的文件“/usr/local/venv/cis/lib/python2.7/site packages/sekizai/templatetags/sekizai_tags.py”
83呈现内容=节点