Parameterised dynamic vocabulary. Shows content of catalog using query with object_provides. Pass in the interface in the schema.

gistfile1.py

Definition:
===========

from zope.schema.interfaces import IContextSourceBinder, IBaseVocabulary

class CatalogObjectProvidesSource(object):
    grok.implements(IContextSourceBinder, IBaseVocabulary)

    def __init__(self, interface):
        self.interface = interface

    def __call__(self, context):
        catalog = getToolByName(context, 'portal_catalog')
        brains = catalog(object_provides=self.interface.__identifier__)
        terms = [SimpleVocabulary.createTerm(x.getId, x.getId, x.Title) for x in brains]
        return SimpleVocabulary(terms)


Usage:
======
from my.contenttype.complex import IHoofdComplex

class ITableRowFilter(form.Schema):
    hoofd_complex = schema.Choice(
        title=u'Hoofd Complex',
        vocabulary=CatalogObjectProvidesSource(IHoofdComplex),
        required=False)