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How can I change Base ZClasses (without deleting and recreating a ZClass)? You search the mailing list archives to find similar questions and the corresponding replies....

Well, how can I change Base ZClasses through ZMI? -- Milos Prudek

Hi,

Don't use ZClasses, you will experience pain...

I'm quite new to Zope and read this list now for some weeks. I successfully created my first ZClasses and I realy like them. Can somebody tell me why I should NOT use ZClasses ? Where's the problem ? greetings Achim

Achim Domma writes:

I'm quite new to Zope and read this list now for some weeks. I successfully created my first ZClasses and I realy like them. Can somebody tell me why I should NOT use ZClasses ? Where's the problem ? I like ZClasses and did not yet have serious bad experiences...

But: * They made problems in the past during migration to new Zope versions, usually because products they depended upon have not been installed, were no longer available. The error messages have not been very helpful to locate the problem. Otherwise, you will have the same problems with Python based products, just you are told more directly what went wrong. * There are rumors (--> mailing list archives) that subclassing of a ZClass living in a different product breaks after export/import. * ZClasses are not easy to grasp with all these methods, views, permissions, permission mappings ... * They are strange objects, which cannot be copied, renamed, pasted, rebased.... They may well cause surprises... Dieter

You can... http://www.zope.org/Members/AlexR/ChangingBaseClasses

"Caveat - This solution is unsupported by anyone. Make sure you backup your database before using it. When last tested with Zope 2.1.5 it worked fine but as usual YMMV." ...whether or not you'd want to risk it is another matter ;-) Chris