Assuming you're not changing attribute values, but *just* the class, I've had success with doing an XML export, a find/replace of the class name, and a re-import. The XML is fairly readable, you can just look for example for "Products.MyProduct.OldClass" and replace it with "Products.MyProduct.NewClass". J.F. -----Original Message----- From: zope-bounces@zope.org [mailto:zope-bounces@zope.org] On Behalf Of Miles Waller Sent: June 12, 2006 11:58 AM To: zope@zope.org Subject: [Zope] Changing class of objects in the ZODB Hi, Does anyone have a good approach to changing the class of an object already stored in the ZODB? A site is using classes defined and customised in a product on the filesystem, and I want to split the product into two to separate the unmodified vanilla product, and customisations. I found a script from shane when I googled which purported to do this, but I did not understand exactly what it did and so am a bit nervous of using it. Also, it appeared to do it all in one transaction, which would not be practical for this site (too many objects). I had originally been envisaging doing something in __getstate__ for these objects, so when they were retrieved, they were updated and marked as having been changed so they would be committed at the end of the transaction. But I don't really know exactly what! I don't think it will work to use module_aliases because there will still be a class that can be imported from the original location. Any help much appreciated, Miles _______________________________________________ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )