Am 07.10.2010, 14:34 Uhr, schrieb Fred Drake <>:

> Have you tried using a callable that provides
> zope.schema.interfaces.IContextSourceBinder?
> Looking at the code in 3.7.0 (the newest zope.schema in my egg cache),
> that should work out of the box.

Thanks for the tip. For a vocabulary it has to provide IBaseVocabulary as  
well, although I guess I can just define a source. Unfortunately I'm  
getting now getting an AssertionError when the widgets are setup but I now  
know where to look.

Charlie Clark
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