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Incorrect Cascade Discovery of new objects mapped from managed Embeddables [message #1017751]

Tue, 12 March 2013 13:32

J LM

Messages: 11
Registered: December 2012

Junior Member

Hi,

Simple use case :
TcRoot (Entity) -> TcEmbeddable (Embeddable) -> TcSubEntity (Entity)

@Entity
@Table(name = "TCEMB_ROOT")
@SequenceGenerator(name = "SEQ_TCEMB_ROOT")
public class TcRoot implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE,
generator = "SEQ_TCEMB_ROOT")
@Column(name = "TCEMB_ROOT_ID")
private int id;

@Embedded
TcEmbeddable emb;

public void changeSub(final String newAttr) {
emb.changeSub(newAttr);
}
}

@Embeddable
public class TcEmbeddable implements Serializable {
@OneToOne
@JoinColumn(name = "SUBE_ID", referencedColumnName = "TCEMB_SUBE_ID")
TcSubEntity tcSE;

public void changeSub(final String newAttr) {
tcSE = new TcSubEntity(newAttr);
}
}

@Entity
@Table(name = "TCEMB_SUBE")
@SequenceGenerator(name = "SEQ_TCEMB_SUBE", sequenceName = "SEQ_TCEMB_SUBE")
public class TcSubEntity implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE,
generator = "SEQ_TCEMB_SUBE")
@Column(name = "TCEMB_SUBE_ID")
private int id;
}

After a find of a TcRoot (so managed) and a call on its method changeSub, a new SubEntity is created, transaction fails with Constraint Violation as the Id of the TcSubEntity is not set or take the 0 value.

Having looked at the code, the AggregateObjectMapping seems incomplete on the methods cascadeDiscoverAndPersistUnregisteredNewObjects.
One is inherited from DatabaseMapping which returns always false, the second one doesn't seem to be called.

Bug and Proposed patch for 2.3.X and 2.4.X : https://bugs.eclipse.org/bugs/show_bug.cgi?id=402865

[Updated on: Tue, 12 March 2013 13:34]

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Re: Incorrect Cascade Discovery of new objects mapped from managed Embeddables [message #1017837 is a reply to message #1017751]

Tue, 12 March 2013 16:12

Chris Delahunt

Messages: 1389
Registered: July 2009

Senior Member

This might have been just an oversight in describing the test case, but the TcEmbeddable's OneToOne relationship doesn't have cascade persist set. Without this set, the test case should be expected to fail. Can you verify that you get the same behavior with @OneToOne(cascade=ALL)?

Best Regards,
Chris

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