Hello, http://common-lisp.net/pipermail/elephant-devel/2008-November/004534.html > PE> If using OID values makes sense for this purpose, is there a user-API > PE> way to get an object by its OID? > >yep, via class index: > >(get-value oid (find-class-index 'classname))
It seems like the function named find-class-index disappeared in Elephant 1.0? How can I do the same thing with version 1.0? What I want to do is getting a instance by a class name and an oid. Thanks in advance. Tomo > PE> I'm wondering if it is appropriate to use the OIDs that elephant > PE> assigns objects for this purpose. > >yep, i think it's fine > > PE> Will these values change during the lifetime of the associated object? > >they shouldn't. > >oids are not preserved across export/import operations (by design of these >export/import operations), but typically it's not a problem. > > PE> If using OID values makes sense for this purpose, is there a user-API > PE> way to get an object by its OID? > >yep, via class index: > >(get-value oid (find-class-index 'classname)) > >an internal function get-cached-instance does it in more straightforward >way, though. > > PE> Should I instead add another indexed field on my object that contains > PE> the OID value? > >definitely not, unless you want to use your own ids. _______________________________________________ elephant-devel site list elephant-devel@common-lisp.net http://common-lisp.net/mailman/listinfo/elephant-devel
