"Shop" portlet won't work in /@@ views (portal_languages not found; Plone 4.3.15)

[tobiasherp]

During my efforts to familiarize with bda.plone.org, I noticed that the "Shop" portlet doesn't work when e.g. the @@shop_controlpanel (and all others I tried) is called in the site root: below the Cart viewlet (which links to /@@cart) I get an error (msgid "text_error_rendering_portlet"), and two identical tracebacks in the error log:

Traceback (innermost last):
  Module Products.PloneFormGen.patches, line 21, in safe_render
  Module Products.Five.browser.pagetemplatefile, line 125, in __call__
  Module Products.Five.browser.pagetemplatefile, line 59, in __call__
  Module zope.pagetemplate.pagetemplate, line 132, in pt_render
  Module zope.pagetemplate.pagetemplate, line 240, in __call__
  Module zope.tal.talinterpreter, line 271, in __call__
  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 819, in do_loop_tal
  Module zope.tales.tales, line 685, in setRepeat
  Module zope.tales.tales, line 110, in __init__
  Module bda.plone.shop.browser.navigation, line 199, in links
  Module bda.plone.shop.browser.navigation, line 106, in lookup_navigation_items
  Module bda.plone.shop.browser.navigation, line 104, in unsorted_items
  Module zope.component.registry, line 250, in getAdapters
  Module bda.plone.shop.browser.navigation, line 659, in __init__
  Module bda.plone.shop.browser.navigation, line 165, in context_is_default_page
  Module Products.LinguaPlone.browser.defaultpage, line 23, in getDefaultPage
  Module Products.CMFCore.utils, line 10, in check_getToolByName
  Module Products.CMFCore.utils, line 120, in getToolByName
AttributeError: portal_languages

Having a look in the ZMI, the portal_languages tool is clearly present. In other contexts down the tree, the portlet seems to work.

Is there perhaps some Plone 4.3.15 compatibility issue?

[rnixx]

I see you have Lingua Plone installed. I fear you need to dig down here
https://github.com/bluedynamics/bda.plone.shop/blob/master/src/bda/plone/shop/browser/navigation.py#L165 and step into Products.LinguaPlone.browser.defaultpage to get a clue what's wrong

[tobiasherp]

Ok, I had a look.

IMO, the problem is unrelated to LinguaPlone; rather, the aq_parent call in line 162 should be dropped. With this line present, the portal_languages tool is seeked in the Zope root instead in the Plone site (which fails, of course). See #105.