ANy particular problem??
I would design these classes like this...
@PersistenceCapable(detachable = "true")
public class User implements Serializable {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key id;
private String email;
private String firstName;
private String lastName;
private String password;
private String passwordConf;
private int status;
private boolean enabled;
}
@PersistenceCapable(detachable = "true")
public class Event implements Serializable {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key id;
private Key owner;
private Set<Key> participants;
}
Usually i prefer unowned relationship, but with new pricing you can say you
can save some money by keeping a big entity(too many owned relationships).
With Owned relation your User Entity will keep increasing in size with time.
On Mon, Sep 19, 2011 at 1:50 AM, Alex <[email protected]> wrote:
> Hi all,
>
> I'm using JDO for storage in GAE and would like some advice as I'm having
> trouble modelling my persistence objects.
>
> I have 2 classes, User and Event. A User owns an Event and can participate
> in others Events. My classes look roughly like this.
>
> @PersistenceCapable(detachable = "true")
> public class User implements Serializable {
>
> @PrimaryKey
> @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
> private Key id;
> private String email;
> private String firstName;
> private String lastName;
> private String password;
> private String passwordConf;
> private int status;
> private boolean enabled;
> // owned one-to-many with event
> @Persistent(mappedBy = "owner")
> private List<Event> ownsEvents = new ArrayList<Event>();
> // many to many
> private Set<Key> participatesInEvents = new HashSet<Key>();
>
> --
> You received this message because you are subscribed to the Google Groups
> "Google App Engine for Java" group.
> To view this discussion on the web visit
> https://groups.google.com/d/msg/google-appengine-java/-/ruH77bWja5wJ.
> To post to this group, send email to
> [email protected].
> To unsubscribe from this group, send email to
> [email protected].
> 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 [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/google-appengine-java?hl=en.
