VV> Obviously class order must be persistent. But what about class VV> order-item? Should it be persistent too?
it's better to make it persistent, so you can search on details. VV> Next question. How do you search orders that have say particular item? (mapcar #'order-of (get-instances-by-value 'order-item 'item item)) VV> Do you create a computed index on order class? some complex queries require computed indices, but it seems not in this case VV> Or do you make item class persistent and mark its name as indexed? if you're using objects anyway it makes sense to make everything a persistent object _______________________________________________ elephant-devel site list elephant-devel@common-lisp.net http://common-lisp.net/mailman/listinfo/elephant-devel
