re: http://lists.zope.org/pipermail/zope-dev/2000-March/004034.html This message is about 1.5 years old, but no replies?, & I haven't seen any similar messages or howtos? --Alexandre Ratti Fri, 31 Mar 2000

Summary: (when creating a folderish ZClass and cascading base classes) if ZObjectManager isn't subclassed at 1st level, objects can be added to the folderish ZClass instances but they don't show in the manage_main object list.

Here I first created MyBaseClass, then I subclassed it together with ZObjectManager when creating MyTestClass ... when I add objects in an instance of MyTestClass they do not show in the object list (Content view). I *think* they are actually added because I cannot add an additional one with the same ID: I get an "ID already in use" error.

It's not that bad, but I can't create a standard base class, then use it to create a folderish variant.

I have the same symptoms, objects dont display in a folder subclass, but are there. Heres how I fixed it: Your base class must be the last in the class inheritance list. You must add all other base classes first. This will almost always be a problem because most base classes start with ZClass... and will be last alphabetically. (this will be much easier to fix if/when you can change, or at least reorder, the base classes of an object) eg: ZObject, ZObjectManager, CatalogAwareBase, MyBaseClass If you have a complicated object, I think you can export it in XML, reorder the base classes, & reimport. But adding/removing classes this way doesn't update the management interface tabs. Daniel Rogahn drogahn@d.umn.edu http://www.d.umn.edu/~drogahn/