| Author |
Hibernate + Ternary Relation
|
Babu Mehrunnesa
Greenhorn
Joined: Dec 18, 2008
Posts: 9
|
|
Hi Am having 3 entity classes Participant(participantId-ID), Artifact(artifactId-ID) & Status(StatusIs-ID, readStatus). There is a @ManyToMany relationship b/w Participant -> Artifact. As a result in mysql DB a new join_table Participant_Artifact got created. The structure of the Join table is Participant_Artifact Participant_participantId | Artifact_artifactId My requirement is to add the read status per participantId/per ArtifactId. i.e I need to create the ternary relationship b/w Participant_Artifact_Status. My Join Table should look like Participant_Artifact_Status Participant_participantId | Artifact_artifactId | Status_statusId p1 a1 s1 p1 a2 s1 p2 a1 s2 p2 a2 s1 My Participant entity class looks like @Entity public class Participant implements Serializable { @Id private Long userId; @ManyToMany private List<Artifact> artifact ; ... } Artifact.java @Entity public class Artifact implements Serializable { @Id private Long artifactId; ... } Status.java @Entity public class Status implements Serializable { @Id private Long statusId } @ManyToMany b/w Participant -> Artifact Could some one pl tell me How I can build ternary association b/w Participant -> Artifact -> Status [ December 23, 2008: Message edited by: Babu Mehrunnesa ]
|
 |
Chandra Bhatt
Ranch Hand
Joined: Feb 28, 2007
Posts: 1707
|
|
Hi Babu, Welcome to JavaRanch community!!! Can you come up with what have you tried with this up till now? Please post real scenario/example for ease in comprehending your problem.
|
cmbhatt
|
 |
Amit Ghorpade
Bartender
Joined: Jun 06, 2007
Posts: 2551
|
|
|
"Babu HM" please check your private messages for an important administrative matter. You can see them by clicking the My Private Messages link above.
|
SCJP, SCWCD.
|Asking Good Questions|
|
 |
 |
|
|
subject: Hibernate + Ternary Relation
|
|
|