Chris Withers wrote: > Laurence Rowe wrote: >> Jim Fulton wrote: >>> Well said. A feature I'd like to add is the ability to have persistent >>> objects that don't get their own database records, so that you can get >>> the benefit of having them track their changes without incuring the >>> expense of a separate database object. >> +lots >> >> Hanno Schlichting recently posted a nice graph showing the persistent >> structure of a Plone Page object and it's 9 (!) sub-objects. >> http://blog.hannosch.eu/2009/05/visualizing-persistent-structure-of.html > > That graph isn't quite correct ;-) > > workflow_history has DateTime objects in it, and I think they get their > own pickle.
Nope. DateTime objects are plain old-style classes and don't inherit from persistent.*. They are incredibly expensive to unpickle since all the DWIM magic in their __init__ get called each time, though. Hanno _______________________________________________ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
