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

Sebastian Ware sebastian at urbantalk.se
Mon Jul 16 03:27:57 EDT 2007

So the behaviour of grok.Application is different from that of  
grok.Container with respect to when the catalog(?) that holds the  
content is created.

This is a bit confusing to me, even though I am sure there is a  
technical explanation I would have preferred that they worked in the  
same way.

Mvh Sebastian

15 jul 2007 kl. 22.59 skrev Philipp von Weitershausen:

> 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.
> -- 
> http://worldcookery.com -- Professional Zope documentation and  
> training

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