[Zope] Merits of a photo class?

[kedai]

> 
> Anyway, to create a zclass that can contain other zclass's, just
> make sure that the container zclass is based on the ObjectManager
> class. (don't be scared by the term ObjectManager - it is as simple
> as it sounds - it stores objects. It allows you  to create a
> zclass that can contain other zclasses.) 
> 
hi, i've tried the zclass tutorial, and everything went OK.  but when trying to create a zclass within a zclass, i can't see the zclass when i want to create an instance of it.  

e.g.
 i got zclass B in zclass A.  after creating an instance of A, i can't add zclass Badd  did make zclass A as an object manager. 


sorry if this is off topic.