[Grok-dev] Re: LocalUtility Woes

Sebastian Ware sebastian at urbantalk.se
Tue Sep 18 07:58:29 EDT 2007

 From what I have understood about zope.app.generations it is more a  
data transformation component. You write the code to transform your  
persistent objects from one generation to another. The component  
keeps track of what generation the individual objects belong to and  
perform the transformation transparently as needed.

Mvh Sebastian

18 sep 2007 kl. 13.19 skrev Jan-Wijbrand Kolman:

> Kevin Smith wrote:
>> Perhaps I'm missing something.
>> AFAIK if a new LocalUtility or Index needs to be added to the  
>> Application object, I need
>> to delete it and re-create it.
>> This is a real PITA. Without any solid export/import mechanisms in  
>> place this means having
>> to wait until the application is "perfect", or creating yet  
>> another adhoc export/import
>> mechanism. IMO this kills the precepts of Agile development and  
>> Evolvability.
>> So, is there anything that prevents some kind of "re-evaluation"  
>> of a grok.Application at startup
>> to allow addition and removal of local utilities and catalog indexes?
> Not sure, but, would
> http://svn.zope.org/zope.app.generations/trunk/src/zope/app/ 
> generations/
> help in these cases?
> regards,
> jw
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