[Zope] (sort of teaser) Re: [Zope] Recursive aquisition: goodor bad?

Jim Fulton jim@digicool.com
Tue, 08 Jun 1999 14:25:36 +0000


Michel Pelletier wrote:
> 
>         x = DMC(...)
>         return x.__of__(self)
> 
> x must inherit ExtensionClass.Base to get this machinery. 

Actually, both x and self must be ExtensionClass instances.
One way to be an extension class is to subclass Base, but 
Persistent is an extension class too that is not a subclass of Base.

x must have an __of__ implementation.  Not all extension classes
implement __of__.  In this case, x's class wants to subclass
one of the acquisition base classes, Implicit or Explicit.

Jim

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