Itamar Shtull-Trauring <itamar@maxnm.com> wrote:

Bob Barter wrote:

...

Is there a way for an object to be notified that it has been modified?

Use ZPatterns 0.4, it allows you to be notified of events - change, add and delete of objects.

I may be confused, but normally the object should _know_ that it has been modified, because one of its methods has been called. In fact, the usual pattern for this is to have the object notify other interested parties ("Observers") of the fact that it has changed. 2.2 has experimental support for this -- see $ZOPE/lib/python/OFS/DefaultObservable.py. Also, see the writeup on this in the Intefaces wiki (start from http://www.zope.org/WikiCentral -- look for ObserverAndNotification. Tres.