2008/10/23 Herbert Liechti <[EMAIL PROTECTED]>: > Hi all > > I'm currently involved in a project where a ressource > > planning system is developed. We are using the > > datetime.* libs for that purpose. > > Values of occupied ressources > > are stored in a database. For a intersection wether a > > ressource is free or occupied we are using > > DateTime::SpanSet. But now the problem: > > I have to be able to associate a database object > > with a given SpanSet which I create when retrieving > > the data from the database. > > spans: > > [.n.][.n.][.n.] -> new reservation > > [.a.][.a.][.a.][.b.][.b.][.c.] -> existing data > > intersection gives conflicts with a & b which is correct > but i loose the context which of the dt objects belongs > to which data object. > > First approach was to inherit from DateTime and > storing object references. But when I intersect_span > the sets, I'm loosing my references, seems that the dt > objects are newly created. >
That's correct, DateTime sets always return cloned objects. > How can I solve that problem. If it is helpful I can > attach the inheritet DateTime code > Sure, that might help. > Thank you very much for your help and sorry for the > bad english. > > Regards Herbie > Flávio S. Glock
