[Grok-dev] Re: zope.app.keyreference.interfaces.NotYet(object)

Philipp von Weitershausen philipp at weitershausen.de
Sun Jul 15 16:59:17 EDT 2007

Sebastian Ware wrote:
> What surprised me was that that kind of assignment worked with my 
> grok.Application object...
> class ProtonCMS(grok.Application, grok.Container):
>     interface.implements(interfaces.IProtonCMS)
>     def __init__(self):
>         super(ProtonCMS, self).__init__()
>         self.title = ''
>         self.description = ''
>         self['default'] = protonworkflow.ProtonWorkflow()
> ...and I was expecting the "class ProtonContainer(grok.Container, 
> protonobject.ProtonObject)" to work in the same way.
> Do you know why I can make the assignment in the grok.Application object 
> but not in the grok.Container object?

Yup. Because the catalog (which keeps the indexes for your objects) is 
created whenever a grok.Application object is created. Actually, it's 
creates slightly after the application object. That's why indexing won't 
happen in any application's __init__ method. But it will happen upon all 
other modified events, and container[name] = obj happens to throw a 
ContainerModifiedEvent or something of that sort.

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