I'm pretty new to the JDO/GAE world, and I'm having some troubles grasping the entity relationship models. I have read about entity groups and parent keys but I can't seem to implement it correctly in my example.
I started by trying to model my entities the same way I have done it a million times with JPA and relational databases (see below), but it is not working right. The first error I receive is trying to query for a Team by a manager (select from team where manager==managerParam), I get an error "Key of parameter value does not have a parent". So obviously my relationships are not right. I haven't even gotten to the Collection<Player> yet, since I can't get a simple relationship working.... Any help would be appreciated! @PersistenceCapable(identityType = IdentityType.APPLICATION) public class Manager { @PrimaryKey @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) private Key id; @Persistent private User user; } @PersistenceCapable(identityType = IdentityType.APPLICATION) public class Team { @PrimaryKey @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) private Key id; @Persistent private String name; @Persistent private Manager manager; @Persistent private Collection<Player> players; } @PersistenceCapable(identityType = IdentityType.APPLICATION) public class Player { @PrimaryKey @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) private Key id; @Persistent private String name; } -- 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.