[Zope] date-Attributes with no value

Dieter Maurer dieter@handshake.de
Wed, 18 Jun 2003 20:44:17 +0200

Andreas Pakulat wrote at 2003-6-18 01:31 +0200:
 > I just wondered if it is possible (without an Python-based Product) to
 > have date-Properties that have no value, but None or some equivalent.

You must modify Zope's code, adding a new "date_or_none" property type
together with its converter.