Re: Maximum recursion depth using context in template

25. mars 2015 kl. 18:41 skrev Carsten Agger-2 [via Plone] <ml-node+s293351n7573465h68-PKuAHvtXa09l57MIdRCFDg@public.gmane.org>:

> I'm having a kind of weird problem with a viewlet template. 
> 
> We're inserting a list of custom links, specified by the customer, in 
> the header - like an extra menu. 
> 
> I want to configure this by having a folder containing only links in the 
> site root, i.e. accessible at "context/links". 
> 
> This exists and is iterable: 
> 
> >>> app.site.links 
> 
> <ATFolder at /site/links> 
> 
> >>> for l in app.site.links: 
> 
> ...     print l 
> 
> ... 
> 
> nyheder 
> 
> partnerskaber 
> 
> 
> I then insert code for generating it along with our customized search 
> box viewlet: 
> 
> <ul id="extralinks" 
> 
>      tal:repeat="link root/site/links"> 
> 
>      <li class="plain" > 
> 
>      <a href="..." class="" title=""> 
> 
>          <span tal:content="structure link/title"></span> 

what does
<span tal:content=‘link/title’ />

return ?

(or if that does not work
<span tal:define=‘lenketittel link/title’ tal:content=‘lenketittel’ />

 
> 
>      </a> 
> 
>      </li> 
> 
> </ul> 
> 
> This, however, apparently gives an infinite recursion: 
> 
> RuntimeError('maximum recursion depth exceeded',) (Also, the following 
> error occurred while attempting to render the standard error message, 
> please see the event log for full details: maximum recursion depth 
> exceeded) 
> 
> However, if I try to access specific members of existing links, it 
> actually "works". 
> 
> Thus, having these lines in the template: 
> 
> <!-- Extra links --> 
> <ul id="extralinks" 
>      tal:repeat="link root/site/links/nyheder/title"> 
>      <li class="plain" > 
>      <a href="/site/news" class="" title=""> 
>          <span tal:content="structure link"></span> 
>      </a> 
>      </li> 
> </ul> 
> 
> will iterate through the title of the link "Nyheder", yielding the link 
> texts 'N', 'y', 'h', 'e', 'd', 'e', 'r'. 
> 
> What am I doing wrong here? I find the failure to iterate through the 
> links while succeeding in accessing the title rather confusing. 
> 
> Thanks in advance for any response! 
> 
> Below, the last lines of the stack trace from the log. 
> 
> Best regards 
> Carsten 
> 
> 
>    File "/home/dbc/buildout-cache/eggs/zope.tal-3.5.2-py2.7.egg/zope/tal/talinterpreter.py", line 742, in do_insertStructure_tal 
> 
>      structure = self.engine.evaluateStructure(expr) 
> 
>    File "/home/dbc/buildout-cache/eggs/Zope2-2.13.19-py2.7.egg/Products/PageTemplates/Expressions.py", line 218, in evaluateStructure 
> 
>      text = super(ZopeContext, self).evaluateStructure(expr) 
> 
>    File "/home/dbc/buildout-cache/eggs/zope.tales-3.5.2-py2.7.egg/zope/tales/tales.py", line 696, in evaluate 
> 
>      return expression(self) 
> 
>    File "/home/dbc/buildout-cache/eggs/Zope2-2.13.19-py2.7.egg/Products/PageTemplates/Expressions.py", line 383, in __call__ 
> 
>      v = evaluate(var) 
> 
>    File "/home/dbc/buildout-cache/eggs/Zope2-2.13.19-py2.7.egg/Products/PageTemplates/Expressions.py", line 225, in evaluateText 
> 
>      text = self.evaluate(expr) 
> 
>    File "/home/dbc/buildout-cache/eggs/zope.tales-3.5.2-py2.7.egg/zope/tales/tales.py", line 696, in evaluate 
> 
>      return expression(self) 
> 
>    File "/home/dbc/buildout-cache/eggs/zope.tales-3.5.2-py2.7.egg/zope/tales/expressions.py", line 217, in __call__ 
> 
>      return self._eval(econtext) 
> 
>    File "/home/dbc/buildout-cache/eggs/Zope2-2.13.19-py2.7.egg/Products/PageTemplates/Expressions.py", line 147, in _eval 
> 
>      ob = self._subexprs[-1](econtext) 
> 
>    File "/home/dbc/buildout-cache/eggs/zope.tales-3.5.2-py2.7.egg/zope/tales/expressions.py", line 124, in _eval 
> 
>      ob = self._traverser(ob, element, econtext) 
> 
>    File "/home/dbc/buildout-cache/eggs/Zope2-2.13.19-py2.7.egg/Products/PageTemplates/Expressions.py", line 97, in trustedBoboAwareZopeTraverse 
> 
>      request=request) 
> 
>    File "/home/dbc/buildout-cache/eggs/zope.traversing-3.13.2-py2.7.egg/zope/traversing/adapters.py", line 131, in traversePathElement 
> 
>      traversable = ITraversable(obj, None) 
> 
>    File "/home/dbc/buildout-cache/eggs/zope.component-3.9.5-py2.7.egg/zope/component/hooks.py", line 104, in adapter_hook 
> 
>      return siteinfo.adapter_hook(interface, object, name, default) 
> 
> RuntimeError: maximum recursion depth exceeded 
> 
> 
> 
> 
> 
> -- 
> Carsten Agger 
> Magenta ApS 
> Incuba, Åbogade 15 
> DK-8200 Aarhus N 
> 
> Tlf +45 3336 9699 
> Dir +45 5060 1476 
> Mob +45 2086 5010 
> 
> http://www.magenta.dk
> [hidden email] 
> 
> 
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