[Zope] global name 'context' not defined in TrustedFSPageTemplate

[Jürgen Herrmann]

On Thu, June 1, 2006 18:13, Jürgen Herrmann wrote:
>
> On Thu, June 1, 2006 18:08, Jonathan wrote:
>>
>> ----- Original Message -----
>> From: "Jürgen Herrmann" <Juergen.Herrmann at XLhost.de>
>> To: <zope at zope.org>
>> Sent: Thursday, June 01, 2006 11:51 AM
>> Subject: [Zope] global name 'context' not defined in TrustedFSPageTemplate
>>
>>
>>> hi!
>>>
>>> i get the following error in one of my trusted page template files:
>>>
>>> Traceback (innermost last):
>>>    * Module ZPublisher.Publish, line 113, in publish
>>>    * Module ZPublisher.mapply, line 88, in mapply
>>>    * Module ZPublisher.Publish, line 40, in call_object
>>>    * Module Shared.DC.Scripts.Bindings, line 311, in __call__
>>>    * Module Shared.DC.Scripts.Bindings, line 348, in _bindAndExec
>>>    * Module Products.CMFCore.FSPageTemplate, line 195, in _exec
>>>    * Module Products.TrustedExecutables.TrustedFSPageTemplate, line 31, in
>>> pt_render
>>>    * Module Products.PageTemplates.PageTemplate, line 104, in pt_render
>>>      <TrustedFSPageTemplate at /bliss/BlissCalendar/show_content_week>
>>>    * Module TAL.TALInterpreter, line 238, in __call__
>>>    * Module TAL.TALInterpreter, line 281, in interpret
>>>    * Module TAL.TALInterpreter, line 507, in do_setLocal_tal
>>>    * Module Products.PageTemplates.TALES, line 221, in evaluate
>>>      URL:
>>> file:/home/bliss/zope/Products/BlissCalendar/www/BlissCalendar/show_content_week.xpt
>>>      Line 3, Column 0
>>>      Expression: <PythonExpr dates.sort(lambda a,b:
>>> cmp(context.utils.text2date(a),
>>> context.utils.text2date(b)))>
>>>      Names:
>>>
>>>      {'container': <BlissCalendar at /bliss/BlissCalendar>,
>>>       'context': <BlissCalendar at /bliss/BlissCalendar>,
>>>       'default': <Products.PageTemplates.TALES.Default instance at
>>> 0xb703850c>,
>>>       'here': <BlissCalendar at /bliss/BlissCalendar>,
>>>       'loop': <Products.PageTemplates.TALES.SafeMapping object at
>>> 0xb5d9426c>,
>>>       'modules':
>>> <Products.TrustedExecutables.TrustedExpression._ModuleImporter instance at
>>> 0xb6fa1b8c>,
>>>       'nothing': None,
>>>       'options': {'args': ()},
>>>       'repeat': <Products.PageTemplates.TALES.SafeMapping object at
>>> 0xb5d9426c>,
>>>       'request': <HTTPRequest,
>>> URL=https://bliss.local/BlissCalendar/show_content_week>,
>>>       'root': <Application at >,
>>>       'template': <TrustedFSPageTemplate at
>>> /bliss/BlissCalendar/show_content_week>,
>>>       'traverse_subpath': [],
>>>       'user': <User at /bliss/data/Users/instances/juherm00 used for
>>> /bliss/acl_users>}
>>>
>>>    * Module Products.PageTemplates.PythonExpr, line 70, in __call__
>>>      __traceback_info__: dates.sort(lambda a,b:
>>> cmp(context.utils.text2date(a),
>>> context.utils.text2date(b)))
>>>    * Module <string>, line 2, in f
>>>    * Module <string>, line 2, in <lambda>
>>>
>>> NameError: global name 'context' is not defined
>>
>> Just a guess (the python gurus could answer this for sure), but lambda
>> functions have access to variables in the containing scope, which in your
>> case is the date.sort function.  Does date.sort provide access to 'context'?
>>
>> A quick test would be to get rid of the lambda function and create a named
>> function and see if that works.
>>
> i have to add that this was a "normal" page template file before, just
> converted i to a trusted one. in the "normal" page template file this
> expression just worked.
>
> i'll dig a bit deeper tomorrow if nothing comes up here.
> going home now, my brain refuses to think any longer.
>
> regards, juergen

i tried what Jonathan suggested and replaced the lambda by a named
comparison function and it works. so my advice for people who might
search the mailinglist in the future:

do not use lambdas in python expressions in trusted fs page templates.

regards, juergen herrmann
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