[Zope-dev] Migrating from ZClasses to Python Products

[Jason Spisak]

Shane:

> Jason Spisak wrote:
> > > > And now the big question...
> > > >
> > > > How do you migrate and existing application from ZClasses to Python
> > > > products?  I've got about 50,000 objects.  Can it be done or am I stuck
> > > > with ZClasses?
> > >
> > > Andy McKay writes:
> > >
> > > Well the number of objects doesnt really matter, but migrating it from
> > > ZClass to Python - Ive never heard of that happening. It would be a cool
> > > project though.
> 
> The hard part (which probably isn't very hard after all :-) ) is writing
> the product that performs the same function as the ZClass. Once that's
> done, a fifteen-line external method (that doesn't use any special
> voodoo) can convert all instances.
> 
> Shane


Perhaps what I should do is just get the data out, and create new instances
all via an external method.  The migration isn't really a 1 for 1
situation. I am trying to address shortcomings like not having a
"dictionary" type property in Zope properties, etc.. So the implementation
will be different anyway.  I guess an export to XML gives me all the data
in the objects, right?  Then I could use that as a map to construct new
instances in a different implementation.


Thanks for all the answers,

Jason