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[CDO/Hibernate] Default values are not recognized [message #903025]

Tue, 21 August 2012 16:41

Christoph Keimel

Messages: 482
Registered: December 2010
Location: Germany

Senior Member

Hello

I am trying to define default values for some attributes of my model.

Using this model element: ...

class TestElement {
	String name = "New Element"
	boolean flagged = "true"
}

... with this test code ...

public void testDefault(IEmTracRepoService repo) {
	
	TestElement element = EmTracFactory.eINSTANCE.createTestElement();
	Assert.isTrue(element.isFlagged());
	Assert.isTrue(element.getName().equals("New Element"));
	
	Diagnostic mDiagnostic = Diagnostician.INSTANCE.validate(element);
	Assert.isTrue(mDiagnostic.getSeverity() == Diagnostic.OK);
	
	CDOTransaction transaction = repo.openTransaction();
	try {
		CDOResource resource = transaction.getOrCreateResource(repo.getResourceName());
		resource.getContents().add(element);
		transaction.commit();
	} catch (CommitException e) {
		logger.info("CommitException: {}", e.getLocalizedMessage());
	} finally {
		transaction.close();
	}
}

... the asserts are all true, but the columns "name" and "flagged" are each saved as NULL in the database. The dbstore persists the values as expected with "New Element" and "1", so I presume it is an issue with Hibernate.

I can think of two solutions:
* When persisting an entity, use the default value if the attribute is unset or null
* Use the database default mechanism upon schema generation to define defaults. I. e. with the columnDefinition attribute of the @Column annotation. (Probably needs a refresh of the entity after persist.)

Is one of these features currently implemented? Or do I need to set Hibernate to use "dynamic-insert"?

Greetings
Christoph

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Re: [CDO/Hibernate] Default values are not recognized [message #903098 is a reply to message #903025]

Tue, 21 August 2012 21:45

Martin Taal

Messages: 5468
Registered: July 2009

Senior Member

Hi Christoph,
The behavior should be the same as the dbstore. Can you enter a bugzilla for this on CDO 4.1/4.2?

gr. Martin

On 08/21/2012 06:41 PM, Christoph Keimel wrote:
> Hello
>
> I am trying to define default values for some attributes of my model.
>
> Using this model element: ...
> class TestElement {
> String name = "New Element"
> boolean flagged = "true"
> }
> ... with this test code ...
> public void testDefault(IEmTracRepoService repo) {
>
> TestElement element = EmTracFactory.eINSTANCE.createTestElement();
> Assert.isTrue(element.isFlagged());
> Assert.isTrue(element.getName().equals("New Element"));
>
> Diagnostic mDiagnostic = Diagnostician.INSTANCE.validate(element);
> Assert.isTrue(mDiagnostic.getSeverity() == Diagnostic.OK);
>
> CDOTransaction transaction = repo.openTransaction();
> try {
> CDOResource resource = transaction.getOrCreateResource(repo.getResourceName());
> resource.getContents().add(element);
> transaction.commit();
> } catch (CommitException e) {
> logger.info("CommitException: {}", e.getLocalizedMessage());
> } finally {
> transaction.close();
> }
> }
> ... the asserts are all true, but the columns "name" and "flagged" are each saved as NULL in the database. The dbstore
> persists the values as expected with "New Element" and "1", so I presume it is an issue with Hibernate.
> I can think of two solutions:
> * When persisting an entity, use the default value if the attribute is unset or null
> * Use the database default mechanism upon schema generation to define defaults. I. e. with the columnDefinition
> attribute of the @Column annotation. (Probably needs a refresh of the entity after persist.)
>
> Is one of these features currently implemented? Or do I need to set Hibernate to use "dynamic-insert"?
>
> Greetings
> Christoph

--

With Regards, Martin Taal

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