[Zope3-Users] Advanced usage of Z3 schemas...

[Jim Fulton]

Andreas Jung wrote:
> 
> Hi,
> 
> I am currently thinking about for a new version of PloneCollectorNG 
> based on Zope 3. The currently implementation uses per-instances schemas 
> (acquired from a parent object managing the schema). How would you do 
> that in Zope 3?

I'm not sure what "that" is.  Surely PloneCollectorNG schemas are different
from Zope 3 schemas.  What is the important property of these schemas that
you want to retain?

- Is it important that the schemas be through-the-web?

- Is it important that the schemas be interfaces?  How
   are you using the schemas?  For example, do you want
   to do component dispatch on the schemas?


> Another question: in Zope 3 we have FieldProperties that automatically 
> handle setting and getting values. This implementation stores the values 
> as instance attributes. What would be the recommended way to store 
> attributes in a RDBMS instead inside the ZODB? By introducing a new 
> RDBMSFieldProperty that handles the set/get methods in the same way as 
> the FieldProperty implementation?

Possibly.  It depends on the RDBMS integration strategy.  If you
were using Ape, you'd probably use the existing field storage.

Jim

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