provides a fallback_on_none_attribute field attribute, allowing to specify default value for attributes of *existing* entities
"""
:organization: Logilab
:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
"""
class Blog(EntityType):
title = String(maxsize=50, required=True)
description = String()
class BlogEntry(EntityType):
title = String(maxsize=100, required=True)
publish_date = Date(default='TODAY')
text = RichString(fulltextindexed=True)
category = String(vocabulary=('important','business'))
entry_of = SubjectRelation('Blog', cardinality='?*')