[Zope-CMF] Extending a Plone Object

Raphael Ritz r.ritz@biologie.hu-berlin.de
Fri, 21 Feb 2003 16:09:18 +0100

David Rawle wrote:

>I'm pulling my hair out here...
>I would like to create a new content type by adding a new field (summary) to
>the standard Event object. And then create new forms based on the standard
>event forms with the new field on it.
>What do I need to do? Do I have to create a whole new content type or can I
>just extend Event. I have tried loads of things and always seem to end up
>getting 404 or other errors.
>I got quite excited when I found http://plone.org/documentation/book/8/view,
>but that example doesn't add any new properties to the object.
>Any help? Any docs out there?
Unfortunately you can't extend existing content types by simply adding a 
few more
properties (I wish there were an easy way for this).
You should write a product in which you define your custom content type.
Here you might just subclass Event, add the property, and adjust its 

Do you know

An alternative could be to use CMFTypes