On Sat, Dec 01, 2007 at 02:34:49AM +0800, Yuan HOng wrote: > Hi, > > It seems that I can not get list attribute of an persistent object > changed. I have the following class, which has a list as one of its > attributes: > > class Cart(Persistent): > items = [] > amount = 0
I hope that's not your actual code. Note here that items is a mutable class attribute, so if you do this: cart = Cart() cart.items.append('foo') ... you've just mutated the default list for all instances. Is that really what you want? ZODB persistence can only store instance attributes, not class attributes. But that's irrelevant to the rest of your examples, because you re-assigned cart.items, which should work. I don't know what's wrong there. -- Paul Winkler http://www.slinkp.com _______________________________________________ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users