> How do I build a key from parent and child if I don't know the parent's > key? I use a field to link the entity group parent instance to a child instance. I make this bi-directional, so from an entity I can retrieve both its parent and also its child or set of children.
> Thanks a lot for your helpful code Ian! Now I've implemented the long > as gae.pk-id. Just be aware that in my code snippet "Way 1" I have both an encoded key string (key="gae.encoded-pk") as the primary key as well as a Long value as a Long ID (gae.pk-id). I believe that GAE/J extracts this Long ID as a summary of the entity's full primary key (which contains its full entity group "path" from its entity group root all the way through to itself). The GAE/J persistence documentation shows how to use the Long ID (gae.pk-id) (and I trust that my code conforms!). Enjoy! -- 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-j...@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.
