Hello,
I have defined two classes like this :

@Entity
@Table (name="PROJECT_ACTIVITIES")
@SequenceGenerator(name = "SEQ_PACT_ID", sequenceName = "SEQ_PACT_ID", allocationSize = 1)
public class Activity implements IsSerializable{
@Id
@Column(name="PACT_ID", nullable=false)
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "SEQ_PACT_ID")
private Integer id = null;
@Column(name="PACT_DESC")
private String desc = null;
@Column (name ="STATE")
private Integer state = null;
@Column (name ="PROJ_ID")
private Integer idProject = null;
@Column (name ="PACT_DUE_DATE")
private Date dueDate = null;

@OneToMany (mappedBy = "pactId")
@JoinColumn (name = "PACT_ID", referencedColumnName="PACT_ID", nullable=false)
@Cascade({CascadeType.ALL,CascadeType.DELETE_ORPHAN})
private List<AssignedActivity> assignedTo = new ArrayList<AssignedActivity>();

... }

@Entity
@Table(name = "ASSIGNED_ACTIVITIES")
@IdClass(AssignedActivityPk.class)
public class AssignedActivity implements IsSerializable {
@Id
@Column (name = "CONS_ID", nullable=false)
private Integer consId;
@Id
@Column (name = "PACT_ID", nullable=false)
private Integer pactId;
@Column (name = "TYPE")
private Integer type;
@Column (name = "ASG_EST_TIME")
private Integer asgEstTime;
...}

As the ud from the parent class (Activity) is generated by a sequence from de database, when I'm trying to insert a new Activity, the record for parent object is correct (the id is generated) but not for the child. So i've the child inserted but width the pact_id = null.

How can i tell to hibernate to copy the generated pact_id from the parent??

thank you very much!

In the AssignedActivity you need to map the Activity object, not the Integer ID value. Map it something like this with @ManyToOne:



See http://www.hibernate.org/hib_docs/annot ... ollections for several examples

Thank you! That worked.
I thougt i was a way to implement this just unidirectional relation...

Now it's not working and i don't understand why..
The annotations in my classes are :

Activity{

@OneToMany (mappedBy = "pactId", fetch = FetchType.LAZY)
@JoinColumn (name = "PACT_ID", referencedColumnName="PACT_ID", nullable=false)
@Cascade({CascadeType.ALL,CascadeType.DELETE_ORPHAN})
private Set<AssignedActivity> assignedTo = new HashSet<AssignedActivity>();
...
}

AssignedActivity{
@Id
@Column (name = "CONS_ID", nullable=false)
private Integer consId;
@Id
@Column (name = "PACT_ID", nullable=false)
private Integer pactId;
@Column (name = "TYPE")
private Integer type;
@Column (name = "ASG_EST_TIME")
private Integer asgEstTime;

@ManyToOne
@JoinColumn (name = "PACT_ID", nullable=false, insertable = false, updatable = false)
private Activity activity;
...
}

Now it continues inserting the registar width pact = NULL. Do you know which is the problem?
Thanks!!

Finally i've foud a solution.. maybe will help someone.
The think was that i've a OneToMany-ManyToOne relation (bidirectional), an activity has multiple AssignedActivities and a AssignedActivity is relationated width an Activity.

Here are my Classes :

and then to save and update my records i'm doing :




To update the records i delete first the old records and then create the new ones. After long time, this is the solution i've found which is working... if somebody has a better solution please let me know.

Regards,