[Zope-dev] Re: Patching object class

Florent Guillaume wrote:

I have the need to "update" some persistent objects in a ZODB to change their class.

One use case comparable to the one I have would be to change all objects of type Folder to OrderedFolder. To do that, I envisionned finding all thoses objects and doing

ob.__class__ = OrderedFolder ob._p_changed = 1

Would this work ?

If not, what other hack could I do ? The idea being that I don't want to recreate all the objects.

Maybe you should install OrderedObjectManager for bringing order to all your folders. http://www.zope.org/Members/mjablonski/OrderedObjectManager I'll release an api-updated version when 2.7 is released. Cheers, Maik