[Zope] PageTemplates len() of unsized object

[Giampiero Benvenuti]

Thanks Dieter,

I was able to "solve" the problem by uninstalling all the products. By  
trial and error I found out the problem was caused by the Placeless  
Translation Service product. Maybe there was some dependency from  
something else; I can't tell. I just got rid of it and now everything  
works as normal.

Thanks anyhow,

Giampiero


On May 28, 2008, at 8:48 PM, Dieter Maurer wrote:

> Giampiero Benvenuti wrote at 2008-5-24 11:47 +0200:
>> ...
>> after the upgrade from zope2.9.7 to 2.10.6 i get this error in the
>> event log:
>>
>> 2008-05-24T09:31:32 ERROR Zope.SiteErrorLog http://myurl/error_log/manage_main
>> 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 Shared.DC.Scripts.Bindings, line 313, in __call__
>>  Module Shared.DC.Scripts.Bindings, line 350, in _bindAndExec
>>  Module Products.PageTemplates.PageTemplateFile, line 129, in _exec
>>  Module Products.PageTemplates.PageTemplate, line 89, in pt_render
>>  Module zope.pagetemplate.pagetemplate, line 117, in pt_render
>>  Module zope.tal.talinterpreter, line 271, in __call__
>>  Module zope.tal.talinterpreter, line 346, in interpret
>>  Module zope.tal.talinterpreter, line 379, in do_startEndTag
>>  Module zope.tal.talinterpreter, line 412, in do_startTag
>> TypeError: len() of unsized object
>
> Looks as if the Zope 2.10 PageTemplate implementation made a big
> step backward with respect to quality of traceback information :-((
>
> Shane had added lots of "__traceback_info__" and  
> "__traceback_supplement__"
> declarations to the older code such that the tracebacks were
> very informative....
> ... unlike the traceback above.
>
>
> Looking at the code of "do_startTag", I see that the problem is
> with an attribute definition in a start tag.
> Such an attribute definition should be evaluated into a sequence of  
> strings
> (or unicode strings).
> The error happens because one of these sequence elements is
> not a string, more precisely, it is something "len(...)" cannot be  
> applied to.
>
>
> Unfortunately, we would need to know the affected template,
> the template line this problems occurs in (and its code)
> and the attribute causing this problem.
> It would be Zope's task to provide this information -- but as I have  
> said:
> it apparently made big steps backward with Zope 2.10....
>
>
> You could try to add
>
>    __traceback_info__ = name, item, rendered, s
>
> before line 412 of "zope/tal/talinterpreter.py".
>
> The traceback would then tell us: the name of the tag ("name"),
> the attribute definition ("item"), its evaluation ("rendered")
> and the problematic element.
>
> We still would not know which PageTemplate causes the problem (but
> we might guess this).
>
>
>
> -- 
> Dieter
>