RSS Atom feed attribute error NoneType' object has no attribute 'display_datetime'

[Wim Boucquaert]

2010-04-06T09:19:33 ERROR Zope.SiteErrorLog 1270538373.940.553982044156
http://www.blabla/library/news_homepage_viewer/atom.xml
Traceback (innermost last):
  Module ZPublisher.Publish, line 119, in publish
  Module ZPublisher.mapply, line 88, in mapply
  Module ZPublisher.Publish, line 42, in call_object
  Module Products.SilvaNews.browser.feed, line 17, in __call__
  Module Products.Five.browser.metaconfigure, line 417, in __call__
  Module Shared.DC.Scripts.Bindings, line 313, in __call__
  Module Shared.DC.Scripts.Bindings, line 350, in _bindAndExec
  Module Products.PageTemplates.PageTemplateFile, line 126, in _exec
  Module Products.PageTemplates.PageTemplate, line 98, in pt_render
  Module zope.pagetemplate.pagetemplate, line 115, in pt_render
  Module zope.tal.talinterpreter, line 271, in __call__
  Module zope.tal.talinterpreter, line 346, in interpret
  Module zope.tal.talinterpreter, line 586, in do_setLocal_tal
  Module zope.tales.tales, line 696, in evaluate
   - URL: index
   - Line 2, Column 0
   - Expression: <PathExpr standard:u'view/get_data'>
   - Names:
      {'container': <Silva News Viewer instance news_homepage_viewer>,
       'context': <Silva News Viewer instance news_homepage_viewer>,
       'default': <object object at 0xb7f2e528>,
       'here': <Silva News Viewer instance news_homepage_viewer>,
       'loop': {},
       'nothing': None,
       'options': {'args': (<Products.Five.metaclass.SimpleViewClass from
/opt/zope/newbuildout/parts/silva-all/SilvaNews/browser/atom.pt object at
0x1abb4e4c>,
                            <Products.Five.metaclass.SimpleViewClass from
/opt/zope/newbuildout/parts/silva-all/SilvaNews/browser/atom.pt object at
0x1abb4e4c>)},
       'repeat': <Products.PageTemplates.Expressions.SafeMapping object at
0x1abb446c>,
       'request': <HTTPRequest,
URL=http://www.blabla/library/news_homepage_viewer/atom.xml>,
       'root': <Application at >,
       'template': <ImplicitAcquirerWrapper object at 0x1abb4c4c>,
       'traverse_subpath': [],
       'user': <SpecialUser 'Anonymous User'>,
       'view': <Products.Five.metaclass.SimpleViewClass from
/opt/zope/newbuildout/parts/silva-all/SilvaNews/browser/atom.pt object at
0x1abb4e4c>,
       'views': <zope.app.pagetemplate.viewpagetemplatefile.ViewMapper object at
0x1abb4a6c>}
  Module zope.tales.expressions, line 217, in __call__
  Module Products.PageTemplates.Expressions, line 141, in _eval
  Module Products.PageTemplates.Expressions, line 105, in render
  Module Products.SilvaNews.browser.feed, line 41, in get_data
  Module Products.SilvaNews.browser.feed, line 26, in _get_entries
  Module Products.SilvaNews.adapters.feedentry, line 21, in date_updated
AttributeError: 'NoneType' object has no attribute 'display_datetime'