IObjectModifiedEvent: can you know the previous values?

[Maurits van Rees]

Martin Aspeli, on 2007-04-04:
> This is basically because of the premature object creation in CMF/AT,
> portal_factory, and the title-to-id renaming scheme. Note that for
> Archetypes, you may find it useful to listen to IObjectInitializedEvent
> (first proper save) and IObjectEditedEvent (subsequent edits). Both derive
> from IObjectModified, but should be fired only once. In fact, if you listen
> for IObjectModifiedEvent, you're probably getting those as well. :)

I will keep that in mind.

Or rather, I will put some comments into my configure.zcml so I do not
forget it. :)

IObjectMovedEvent might still be handier in my case, as then my
handler also gets called when an object is moved or removed, which I
need.  I could subscribe to those events separately of course.

Ah well, some more test coverage should help me to figure out the best
way.

-- 
Maurits van Rees | http://maurits.vanrees.org/ [NL]
            Work | http://zestsoftware.nl/
"Do not worry about your difficulties in computers,
 I can assure you mine are still greater."