Using template files for zope formlib widgets

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Derek Broughton-3 () Using template files for zope formlib widgets

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I'm trying to build a formlib widget that uses the Google Search API to
return images related to a given field.

I have the Field defined, extending zope.schema.ASCIIline. I have a widget,
extending DisplayWidget. I seem even to be able to hand code the HTML I
want into the return statement of the Widget's __call__(). I'd like to get
the HTML out of the python code, though, and into a page template, and that
I can't do. Everything I've tried, to use a template results in one or
another error indicating that the context in which the template is expanded
is missing _something_ important.

Most commonly, I end up with errors indicating that the "REQUEST" object
doesn't have an attribute named "other" (see below).

I refuse to believe it isn't possible, but I don't want to tear my hair out,
so somebody please point me to some useful documentation.

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 zope.formlib.form, line 770, in __call__
Module zope.formlib.form, line 764, in render
Module plone.app.form._named, line 26, in __call__
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 891, in do_useMacro
Module zope.tal.talinterpreter, line 346, in interpret
Module zope.tal.talinterpreter, line 536, in do_optTag_tal
Module zope.tal.talinterpreter, line 521, in do_optTag
Module zope.tal.talinterpreter, line 516, in no_tag
Module zope.tal.talinterpreter, line 346, in interpret
Module zope.tal.talinterpreter, line 891, in do_useMacro
Module zope.tal.talinterpreter, line 346, in interpret
Module zope.tal.talinterpreter, line 536, in do_optTag_tal
Module zope.tal.talinterpreter, line 521, in do_optTag
Module zope.tal.talinterpreter, line 516, in no_tag
Module zope.tal.talinterpreter, line 346, in interpret
Module zope.tal.talinterpreter, line 957, in do_defineSlot
Module zope.tal.talinterpreter, line 346, in interpret
Module zope.tal.talinterpreter, line 536, in do_optTag_tal
Module zope.tal.talinterpreter, line 521, in do_optTag
Module zope.tal.talinterpreter, line 516, in no_tag
Module zope.tal.talinterpreter, line 346, in interpret
Module zope.tal.talinterpreter, line 861, in do_defineMacro
Module zope.tal.talinterpreter, line 346, in interpret
Module zope.tal.talinterpreter, line 949, in do_defineSlot
Module zope.tal.talinterpreter, line 346, in interpret
Module zope.tal.talinterpreter, line 536, in do_optTag_tal
Module zope.tal.talinterpreter, line 521, in do_optTag
Module zope.tal.talinterpreter, line 516, in no_tag
Module zope.tal.talinterpreter, line 346, in interpret
Module zope.tal.talinterpreter, line 949, in do_defineSlot
Module zope.tal.talinterpreter, line 346, in interpret
Module zope.tal.talinterpreter, line 861, in do_defineMacro
Module zope.tal.talinterpreter, line 346, in interpret
Module zope.tal.talinterpreter, line 861, in do_defineMacro
Module zope.tal.talinterpreter, line 346, in interpret
Module zope.tal.talinterpreter, line 957, in do_defineSlot
Module zope.tal.talinterpreter, line 346, in interpret
Module zope.tal.talinterpreter, line 534, in do_optTag_tal
Module zope.tal.talinterpreter, line 516, in no_tag
Module zope.tal.talinterpreter, line 346, in interpret
Module zope.tal.talinterpreter, line 824, in do_loop_tal
Module zope.tal.talinterpreter, line 346, in interpret
Module zope.tal.talinterpreter, line 536, in do_optTag_tal
Module zope.tal.talinterpreter, line 521, in do_optTag
Module zope.tal.talinterpreter, line 516, in no_tag
Module zope.tal.talinterpreter, line 346, in interpret
Module zope.tal.talinterpreter, line 745, in do_insertStructure_tal
Module Products.PageTemplates.Expressions, line 221, in evaluateStructure
Module zope.tales.tales, line 696, in evaluate
- URL: pageform
- Line 109, Column 10
- Expression: <PathExpr standard:'widget'>
- Names:
{'container': <OBISInstitution at /Plone/data/science/centre-for-
science-advice/obis-canada/obis-data/ARC>,
'context': <OBISInstitution at /Plone/data/science/centre-for-
science-advice/obis-canada/obis-data/ARC>,
'default': <object object at 0xb7e3c530>,
'here': <OBISInstitution at /Plone/data/science/centre-for-science-
advice/obis-canada/obis-data/ARC>,
'loop': {'widget': <Products.PageTemplates.Expressions.PathIterator
object at 0xfd033ac>},
'nothing': None,
'options': {'args': ()},
'repeat': <Products.PageTemplates.Expressions.SafeMapping object at
0xff56d6c>,
'request': <HTTPRequest, URL=http://vdc/data/science/centre-for-
science-advice/obis-canada/obis-data/ARC/@@distribution>,
'root': <Application at >,
'template': <ImplicitAcquirerWrapper object at 0xfef35cc>,
'traverse_subpath': [],
'user': <PloneUser 'broughtond'>,
'view': <Products.Five.metaclass.SimpleViewClass from
/home/derek/plone/VDC/src/obiscanada/Products/obiscanada/browser/templates/DistributionView.ptobject
at 0x10484f8c>,
'views': <zope.app.pagetemplate.viewpagetemplatefile.ViewMapper
object at 0xff56bec>}
Module zope.tales.expressions, line 217, in __call__
Module Products.PageTemplates.Expressions, line 161, in _eval
Module Products.PageTemplates.Expressions, line 123, in render
Module Products.obiscanada.browser.widgets, line 100, in __call__
Module Shared.DC.Scripts.Bindings, line 313, in __call__
Module Shared.DC.Scripts.Bindings, line 348, in _bindAndExec
Module Shared.DC.Scripts.Bindings, line 1, in ?
Module Shared.DC.Scripts.Bindings, line 293, in _getTraverseSubpath
AttributeError: 'str' object has no attribute 'other'

--
derek

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