[Zope-dev] Zope object oid's

[Jason Spisak]

Jonothan Farr writes:

> > > oid = object._p_oid
> >
> > Is this unique for the interpretor session?  Or is this oid constant for
> > that object and stroed in the FileStorage?
> 
> Yes, yes, and yes.
> 
> >
> > >
> > > I'm not sure how to answer the rest of your questions...
> > >
> >
> > But they're so simple?  Not.
> 
> You could implement a storage object that did anything you wanted on the back
> end. Keep in mind that when you store an object, you only know essentially the
> oid, the timestamp of the transaction, and a pickle of the data you're storing.
> You could in theory unpickle the data and use some mechanism for determining
> where you want to store it. Problem is when you load an object, you only know
> the oid, so you need some other mechanism of determining where to load the
> object from based on oid alone. Also, as Jim has mentioned, handling undo and
> versions with multiple storages is a 'tricky' problem. ;)
> 
> --jfarr
> 
> 
> 

I'm curious, does a transaction in the FileStorage contain all the oid's to
be effected by that transaction?  Is it split-up (appended) by transaction
or oid? Transaction, I believe.

All my best,

Jason Spisak
CIO
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