so no other way? On Wed, May 4, 2011 at 12:08 AM, Muhammad Ijaz Khan <aija...@gmail.com>wrote:
> This is exactly what I am doing for now but was wondering if there is a > better way and better way of loading the actual object from key. Thanks for > your comment as it reduced my loneliness :) > > On Wed, May 4, 2011 at 12:03 AM, Luca Matteis <lmatt...@gmail.com> wrote: > >> Owned relationships are a bit weird in my opinion. I was having your >> same issue. I had a `MyImage` class that was defined inside two >> different classes. This didn't work... I didn't quite understand why >> and so to avoid all weirdness I decided that for more complex >> relationship cases I would always use unowned relationships (defining >> the Key of the reference object instead of the object itself). >> >> So I only use owned relationships when the child object can only exist >> under 1 (and only 1) parent. >> >> Hope this helped... it's only what I experienced... I'm not a JDO expert. >> >> Luca >> >> On Tue, May 3, 2011 at 10:51 PM, Muhammad Ijaz Khan <aija...@gmail.com> >> wrote: >> > Hi, >> > I am building an application and have used JDO for datastore for >> > implementing use cases. Now when I am implementing the backend machine >> which >> > is a bit complex in relationships among objects then I am facing hard >> times >> > with JDO (May be due to lack of my knowledge). I have following >> questions to >> > ask, >> > 1. Can I use reference of objects in more than one classes? For example, >> > Class A is persistent and being used as foreign key in Class B and Class >> C. >> > Do I need to create unowned relationships through Key or can I use some >> > annotation (or something) to mark a field of type A as foreign key? When >> I >> > make a field of type A in class B, and assign an object of class A to >> it, it >> > is stored as new object as child of B :s >> > 2. Can I use objectify for this use case only (mixing with jdo) and will >> it >> > simplify stuff or not, any experience comment? >> > Thanks in advance. >> > regards >> > Ijaz >> > >> > -- >> > 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. >> > >> >> -- >> 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. >> >> > -- 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.
