[Grok-dev] Vocabulary registration

[Darryl Cousins]

Hi,

I'm struggling a little here registering a vocabulary for use in a form.
I'm reusing code that I'd previously used and trying to twig it to work
with grok.

I can easily register a vocabulary as a global utility:

class I18nContextLanguageVocabulary(object):
    """Returns the vocabulary for a choice field of available languages
    on the context"""

    def __call__(self, context):
        return
SimpleVocabulary.fromValues(context.getAvailableLanguages())

grok.global_utility(I18nContextLanguageVocabulary,
                    provides=schema.interfaces.IVocabularyFactory,
                    name=u'I18n Context Languages')

And I can get the utility as expected:

    >>> rock = I18nRock(title=u'I wish I were a rock')
    >>> rock.title
    u'I wish I were a rock'
    >>> rock.addLanguage('de',title=u'Ich bin ein Stein')
    >>> rock.getAttribute('title','de')
    u'Ich bin ein Stein'

    >>> from zope.schema.interfaces import IVocabularyFactory
    >>> vocab = component.getUtility(IVocabularyFactory, name='I18n
Context Languages')
    >>> [t.token for t in vocab(rock)]
    ['de', 'en']

But when I call for the i18neditform (which uses the vocabulary):

    >>> request = TestRequest()
    >>> from zope import component
    >>> view = component.getMultiAdapter((rock, request), name='edit')()
    Traceback (most recent call last):
    ...
    VocabularyRegistryError: unknown vocabulary: u'I18n Context
Languages'

So vocabularies registered as global utilities are not available in the
Vocabulary registry. This may be normal?

I'll go on to try setting up a root Application object and registering
the vocabulary as a local_utility to see if I can get to it that way.

Many thanks,
Darryl