AttributeError('getFolderContents',) message on Plone 4 with customised navigation - plone

Question

This is a follow up question to this question, which explains the setup etc.
For anyone needing a quick summary:
I have made a secondary navigation by modifying the global.sections viewlet in portal_view_customizations, it is currently working fine except for one problem.
The Problem
It seems that I am unable to log into my site, or go to mysite.com/plone_control_panel. I receive an error regarding Plone compaining about getFolderContents.
Modified Globalnav TALES:
<tal:sections tal:define="portal_tabs view/portal_tabs"
tal:condition="portal_tabs"
i18n:domain="plone">
<h5 class="hiddenStructure" i18n:translate="heading_sections">Sections</h5>
<ul id="portal-globalnav"
tal:define="selected_tab python:view.selected_portal_tab"
><tal:tabs tal:repeat="tab portal_tabs"
><li tal:define="tid tab/id"
tal:attributes="id string:portaltab-${tid};
class python:selected_tab==tid and 'selected' or 'plain'"
><a href=""
tal:content="tab/name"
tal:attributes="href tab/url;
title tab/description|nothing;">
Tab Name
</a></li></tal:tabs></ul>
<tal:subsections tal:define="isDocument python:getattr(context,'portal_type','') == 'Document';
isFolder python:getattr(context,'portal_type','') == 'Folder';
subitemsDocument python:context.aq_parent.aq_inner.getFolderContents(contentFilter={'portal_type':'Document'});
subitemsFolder python:context.getFolderContents(contentFilter={'portal_type':'Document'});
root_url context/portal_url;
front_url string:${root_url}/front-page;
current_url context/absolute_url;">
<ul id="subnav" tal:condition="isFolder">
<tal:subtabsfolder tal:repeat="subitem subitemsFolder">
<li tal:define="item_url subitem/getURL"
tal:attributes="class python:current_url==item_url and 'selected' or 'plain'">
<a tal:attributes="href subitem/getURL" tal:content="subitem/Title"/>
</li>
</tal:subtabsfolder>
</ul>
<ul id="subnav" tal:condition="isDocument">
<tal:subtabsdocument tal:repeat="subitem subitemsDocument">
<li tal:define="item_url subitem/getURL"
tal:attributes="class python:current_url==item_url and 'selected' or 'plain'">
<a tal:attributes="href subitem/getURL" tal:content="subitem/Title"
tal:condition="python:front_url != current_url"/>
</li>
</tal:subtabsdocument>
</ul>
</tal:subsections>
</tal:sections>
The Error received in browser window:
AttributeError('getFolderContents',) (Also, the following error occurred while attempting to render the standard error message, please see the event log for full details: getFolderContents)
What I managed to get from the logs:
Module zope.pagetemplate.pagetemplate, line 113, in pt_render
Module zope.tal.talinterpreter, line 271, in __call__
Module zope.tal.talinterpreter, line 343, in interpret
Module zope.tal.talinterpreter, line 531, in do_optTag_tal
Module zope.tal.talinterpreter, line 513, in no_tag
Module zope.tal.talinterpreter, line 343, in interpret
Module zope.tal.talinterpreter, line 742, in do_insertStructure_tal
Module Products.PageTemplates.Expressions, line 220, in evaluateStructure
Module zope.tales.tales, line 696, in evaluate
- URL: /usr/local/Plone/buildout-cache/eggs/plone.app.layout-2.0.7-py2.6.egg/plone/app/layout/viewlets/portal_header.pt
- Line 2, Column 4
- Expression: <StringExpr u'plone.portalheader'>
- Names:
{'args': (),
'container': <PloneSite at /mysite-draft>,
'context': <PloneSite at /mysite-draft>,
'default': <object object at 0xb7ee76d8>,
'here': <PloneSite at /mysite-draft>,
'loop': {},
'nothing': None,
'options': {},
'repeat': <Products.PageTemplates.Expressions.SafeMapping object at 0xb56411c>,
'request': <HTTPRequest, URL=http://myserver.com/mysite-draft/login_form>,
'root': <Application at >,
'template': <Products.Five.browser.pagetemplatefile.ViewPageTemplateFile object at 0xc04898c>,
'traverse_subpath': [],
'user': <PropertiedUser 'dan'>,
'view': <Products.Five.viewlet.viewlet.SimpleViewletClass from /usr/local/Plone/buildout-cache/eggs/plone.app.layout-2.0.7-py2.6.egg/plone/app/layout/viewlets/portal_header.pt object at 0x10c0f9ec>,
'views': <Products.Five.browser.pagetemplatefile.ViewMapper object at 0x10c0fe4c>}
Module zope.contentprovider.tales, line 80, in __call__
Module plone.app.viewletmanager.manager, line 154, in render
Module plone.app.viewletmanager.manager, line 85, in render
Module five.customerize.zpt, line 143, in render
Module Products.PageTemplates.ZopePageTemplate, line 335, in _exec
Module Products.PageTemplates.ZopePageTemplate, line 432, in pt_render
Module Products.PageTemplates.PageTemplate, line 80, in pt_render
Module zope.pagetemplate.pagetemplate, line 113, in pt_render
Module zope.tal.talinterpreter, line 271, in __call__
Module zope.tal.talinterpreter, line 343, in interpret
Module zope.tal.talinterpreter, line 852, in do_condition
Module zope.tal.talinterpreter, line 343, in interpret
Module zope.tal.talinterpreter, line 533, in do_optTag_tal
Module zope.tal.talinterpreter, line 518, in do_optTag
Module zope.tal.talinterpreter, line 513, in no_tag
Module zope.tal.talinterpreter, line 343, in interpret
Module zope.tal.talinterpreter, line 583, in do_setLocal_tal
Module zope.tales.tales, line 696, in evaluate
- URL: /mysite-draft/front-page/zope.interface.interface-plone.global_sections
- Line 20, Column 12
- Expression: <PythonExpr context.aq_parent.aq_inner.getFolderContents(contentFilter={'portal_type':'Document'})>
- Names:
{'container': <PloneSite at /mysite-draft>,
'context': <PloneSite at /mysite-draft>,
'default': <object object at 0xb7ee76d8>,
'here': <PloneSite at /mysite-draft>,
'loop': {},
'nothing': None,
'options': {'args': ()},
'repeat': <Products.PageTemplates.Expressions.SafeMapping object at 0xf66a824>,
'request': <HTTPRequest, URL=http://myserver.com/mysite-draft/login_form>,
'root': <Application at >,
'template': <TTWViewTemplate at /mysite-draft/zope.interface.interface-plone.global_sections>,
'user': <PropertiedUser 'dan'>,
'view': <five.customerize.zpt.TTWViewlet object at 0xd6e274c>}
Module Products.PageTemplates.ZRPythonExpr, line 49, in __call__
- __traceback_info__: context.aq_parent.aq_inner.getFolderContents(contentFilter={'portal_type':'Document'})
Module PythonExpr, line 1, in <expression>
AttributeError: getFolderContents
------
2013-07-30T10:59:08 ERROR root Exception while rendering an error message
Traceback (most recent call last):
File "/usr/local/Plone/buildout-cache/eggs/Zope2-2.12.16-py2.6-linux-i686.egg/OFS/SimpleItem.py", line 254, in raise_standardErrorMessage
v = s(**kwargs)
File "/usr/local/Plone/buildout-cache/eggs/Products.CMFCore-2.2.2-py2.6.egg/Products/CMFCore/FSPythonScript.py", line 130, in __call__
return Script.__call__(self, *args, **kw)
File "/usr/local/Plone/buildout-cache/eggs/Zope2-2.12.16-py2.6-linux-i686.egg/Shared/DC/Scripts/Bindings.py", line 324, in __call__
return self._bindAndExec(args, kw, None)
File "/usr/local/Plone/buildout-cache/eggs/Products.PloneHotfix20110531-2.0-py2.6.egg/Products/PloneHotfix20110531/__init__.py", line 106, in _patched_bindAndExec
return self._original_bindAndExec(args, kw, caller_namespace)
File "/usr/local/Plone/buildout-cache/eggs/Zope2-2.12.16-py2.6-linux-i686.egg/Shared/DC/Scripts/Bindings.py", line 361, in _bindAndExec
return self._exec(bound_data, args, kw)
File "/usr/local/Plone/buildout-cache/eggs/Zope2-2.12.16-py2.6-linux-i686.egg/Products/PythonScripts/PythonScript.py", line 344, in _exec
result = f(*args, **kw)
File "Script (Python)", line 34, in standard_error_message
File "/usr/local/Plone/buildout-cache/eggs/Zope2-2.12.16-py2.6-linux-i686.egg/Shared/DC/Scripts/Bindings.py", line 324, in __call__
return self._bindAndExec(args, kw, None)
File "/usr/local/Plone/buildout-cache/eggs/Products.PloneHotfix20110531-2.0-py2.6.egg/Products/PloneHotfix20110531/__init__.py", line 106, in _patched_bindAndExec
return self._original_bindAndExec(args, kw, caller_namespace)
File "/usr/local/Plone/buildout-cache/eggs/Zope2-2.12.16-py2.6-linux-i686.egg/Shared/DC/Scripts/Bindings.py", line 361, in _bindAndExec
return self._exec(bound_data, args, kw)
File "/usr/local/Plone/buildout-cache/eggs/Products.CMFCore-2.2.2-py2.6.egg/Products/CMFCore/FSPageTemplate.py", line 240, in _exec
result = self.pt_render(extra_context=bound_names)
File "/usr/local/Plone/buildout-cache/eggs/Products.CMFCore-2.2.2-py2.6.egg/Products/CMFCore/FSPageTemplate.py", line 180, in pt_render
self, source, extra_context
File "/usr/local/Plone/buildout-cache/eggs/Zope2-2.12.16-py2.6-linux-i686.egg/Products/PageTemplates/PageTemplate.py", line 80, in pt_render
showtal=showtal)
File "/usr/local/Plone/buildout-cache/eggs/zope.pagetemplate-3.5.2-py2.6.egg/zope/pagetemplate/pagetemplate.py", line 113, in pt_render
strictinsert=0, sourceAnnotations=sourceAnnotations)()
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 271, in __call__
self.interpret(self.program)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 343, in interpret
handlers[opcode](self, args)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 888, in do_useMacro
self.interpret(macro)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 343, in interpret
handlers[opcode](self, args)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 533, in do_optTag_tal
self.do_optTag(stuff)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 518, in do_optTag
return self.no_tag(start, program)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 513, in no_tag
self.interpret(program)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 343, in interpret
handlers[opcode](self, args)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 852, in do_condition
self.interpret(block)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 343, in interpret
handlers[opcode](self, args)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 531, in do_optTag_tal
self.no_tag(stuff[-2], stuff[-1])
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 513, in no_tag
self.interpret(program)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 343, in interpret
handlers[opcode](self, args)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 742, in do_insertStructure_tal
structure = self.engine.evaluateStructure(expr)
File "/usr/local/Plone/buildout-cache/eggs/Zope2-2.12.16-py2.6-linux-i686.egg/Products/PageTemplates/Expressions.py", line 220, in evaluateStructure
text = super(ZopeContext, self).evaluateStructure(expr)
File "/usr/local/Plone/buildout-cache/eggs/zope.tales-3.4.0-py2.6.egg/zope/tales/tales.py", line 696, in evaluate
return expression(self)
File "/usr/local/Plone/buildout-cache/eggs/zope.contentprovider-3.5.0-py2.6.egg/zope/contentprovider/tales.py", line 80, in __call__
return provider.render()
File "/usr/local/Plone/buildout-cache/eggs/plone.app.viewletmanager-2.0.1-py2.6.egg/plone/app/viewletmanager/manager.py", line 154, in render
return BaseOrderedViewletManager.render(self)
File "/usr/local/Plone/buildout-cache/eggs/plone.app.viewletmanager-2.0.1-py2.6.egg/plone/app/viewletmanager/manager.py", line 85, in render
return u'\n'.join([viewlet.render() for viewlet in self.viewlets])
File "/usr/local/Plone/buildout-cache/eggs/zope.app.pagetemplate-3.7.1-py2.6.egg/zope/app/pagetemplate/simpleviewclass.py", line 44, in __call__
return self.index(*args, **kw)
File "/usr/local/Plone/buildout-cache/eggs/Zope2-2.12.16-py2.6-linux-i686.egg/Products/Five/browser/pagetemplatefile.py", line 126, in __call__
return self.im_func(im_self, *args, **kw)
File "/usr/local/Plone/buildout-cache/eggs/Zope2-2.12.16-py2.6-linux-i686.egg/Products/Five/browser/pagetemplatefile.py", line 60, in __call__
sourceAnnotations=getattr(debug_flags, 'sourceAnnotations', 0),
File "/usr/local/Plone/buildout-cache/eggs/zope.pagetemplate-3.5.2-py2.6.egg/zope/pagetemplate/pagetemplate.py", line 113, in pt_render
strictinsert=0, sourceAnnotations=sourceAnnotations)()
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 271, in __call__
self.interpret(self.program)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 343, in interpret
handlers[opcode](self, args)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 531, in do_optTag_tal
self.no_tag(stuff[-2], stuff[-1])
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 513, in no_tag
self.interpret(program)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 343, in interpret
handlers[opcode](self, args)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 742, in do_insertStructure_tal
structure = self.engine.evaluateStructure(expr)
File "/usr/local/Plone/buildout-cache/eggs/Zope2-2.12.16-py2.6-linux-i686.egg/Products/PageTemplates/Expressions.py", line 220, in evaluateStructure
text = super(ZopeContext, self).evaluateStructure(expr)
File "/usr/local/Plone/buildout-cache/eggs/zope.tales-3.4.0-py2.6.egg/zope/tales/tales.py", line 696, in evaluate
return expression(self)
File "/usr/local/Plone/buildout-cache/eggs/zope.contentprovider-3.5.0-py2.6.egg/zope/contentprovider/tales.py", line 80, in __call__
return provider.render()
File "/usr/local/Plone/buildout-cache/eggs/plone.app.viewletmanager-2.0.1-py2.6.egg/plone/app/viewletmanager/manager.py", line 154, in render
return BaseOrderedViewletManager.render(self)
File "/usr/local/Plone/buildout-cache/eggs/plone.app.viewletmanager-2.0.1-py2.6.egg/plone/app/viewletmanager/manager.py", line 85, in render
return u'\n'.join([viewlet.render() for viewlet in self.viewlets])
File "/usr/local/Plone/buildout-cache/eggs/five.customerize-1.0-py2.6.egg/five/customerize/zpt.py", line 143, in render
return template._exec(bound_names, args, kwargs)
File "/usr/local/Plone/buildout-cache/eggs/Zope2-2.12.16-py2.6-linux-i686.egg/Products/PageTemplates/ZopePageTemplate.py", line 335, in _exec
result = self.pt_render(extra_context=bound_names)
File "/usr/local/Plone/buildout-cache/eggs/Zope2-2.12.16-py2.6-linux-i686.egg/Products/PageTemplates/ZopePageTemplate.py", line 432, in pt_render
result = PageTemplate.pt_render(self, source, extra_context)
File "/usr/local/Plone/buildout-cache/eggs/Zope2-2.12.16-py2.6-linux-i686.egg/Products/PageTemplates/PageTemplate.py", line 80, in pt_render
showtal=showtal)
File "/usr/local/Plone/buildout-cache/eggs/zope.pagetemplate-3.5.2-py2.6.egg/zope/pagetemplate/pagetemplate.py", line 113, in pt_render
strictinsert=0, sourceAnnotations=sourceAnnotations)()
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 271, in __call__
self.interpret(self.program)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 343, in interpret
handlers[opcode](self, args)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 852, in do_condition
self.interpret(block)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 343, in interpret
handlers[opcode](self, args)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 533, in do_optTag_tal
self.do_optTag(stuff)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 518, in do_optTag
return self.no_tag(start, program)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 513, in no_tag
self.interpret(program)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 343, in interpret
handlers[opcode](self, args)
File "/usr/local/Plone/buildout-cache/eggs/zope.tal-3.5.2-py2.6.egg/zope/tal/talinterpreter.py", line 583, in do_setLocal_tal
self.engine.setLocal(name, self.engine.evaluateValue(expr))
File "/usr/local/Plone/buildout-cache/eggs/zope.tales-3.4.0-py2.6.egg/zope/tales/tales.py", line 696, in evaluate
return expression(self)
File "/usr/local/Plone/buildout-cache/eggs/Zope2-2.12.16-py2.6-linux-i686.egg/Products/PageTemplates/ZRPythonExpr.py", line 49, in __call__
return eval(self._code, vars, {})
File "PythonExpr", line 1, in <expression>
AttributeError: getFolderContents
Can anyone point me in the right direction with this?
I think the problem is related to aq_inner and/or aq_parent in my TALES however I have no idea how to accomplish what the TALES accomplishes without using them.
I even tried a TALES condition on the beggining <tal:subsections> tag to only show the navigation for anonymous users but I still receive the same error.
Any help is greatly appreciated.

Answer 1

The following expression is at fault:
subitemsDocument python:context.aq_parent.aq_inner.getFolderContents(contentFilter={'portal_type':'Document'});
Where context is the Plone site. The parent of a Plone site is the Zope root object, but the getFolderContents() skin method only exists within the Plone site.
It is not clear why you try to get the folder contents of the parent of the context; you may need to test if you are not at the site root here.