I think it depends on the queries you want to support. In GAE it's usually important to know that up-front. Also, the specific trouble you're having might help. Is it a modeling issue, a querying issue, just an issue with the APIs ...?
I have some stuff here (the "querying" posts) that might be relevant to you (it's JPA, but the models should be the same): http://objectuser.wordpress.com/google-app-engine/ Without knowing the queries though, something like this should cover the basic relationships: class Beverage { Long id; Key packaging; Key district; List<Key> materials; } On Aug 31, 10:46 am, funkforce <funkfo...@gmail.com> wrote: > Hi, > > No it doesnt really help me. I understand that I have to manage the > relationships myself but I cant really get it working. So an example > would be nice. > > Thanks > > FF > > On Aug 31, 5:31 pm, Albert Attard <albertatt...@gmail.com> wrote: > > > Hi: > > Quote from the > > page:http://code.google.com/appengine/docs/java/datastore/relationships.ht... > > > "The App Engine implementation of JDO does not yet implement this facility, > > but don't worry, you can still manage these relationships using Key values > > in place of instances (or Collections of instances) of your model objects." > > > Hope this helps, even though it's not much > > Albert Attard > > > Ogden Nash <http://www.brainyquote.com/quotes/authors/o/ogden_nash.html> - > > "The trouble with a kitten is that when it grows up, it's always a cat." > > > 2009/8/31 funkforce <funkfo...@gmail.com> > > > > Hi > > > > Can someone post a full example of working code with unowned > > > relationships? It semas that several pople are havning problems with > > > this on I cant find any solution posted in this group yet. > > > > I think that I must use unowned relationships in my code. If I am > > > mistaken please correct me. > > > > I have a beverage class that has a packaging class ,a district class > > > and a Set of materials. > > > A beverage can have one type of packaing, one type of district ans > > > several materials. > > > Packaing can belong to several beverages. > > > District can belong to several beverages. > > > Materials can belong to several beverages. > > > > Any thoughts? > > > > Thnkas > > > > FF- Hide quoted text - > > > - Show quoted text - --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~----------~----~----~----~------~----~------~--~---
