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can't create a new object [message #651481]

Mon, 31 January 2011 10:41

Luiz E.

Messages: 100
Registered: September 2010

Senior Member

hi all

first, sorry about my english Embarrassed

i don't know if its a bug or not, but here's my problem: ig have these three classes:

Cliente: http://pastie.org/1501994 (yes, cliente has id, but is not shown)
GrupoTelefone: http://pastie.org/1501995
Telefone: http://pastie.org/1501996

when i try to save a NEW 'cliente', eclipselink says that the fields to insert on grupotelefone table is null..so, looking at the grupotelefone table, it has only an Id, which is referenced in other tables...but, being a new grupotelefone, he hasn't id (the database generates a new one) and this way, all the fields (only id) is null...
is there a configuration to disable this verification or something like?
thanks in advice

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Re: can't create a new object [message #651500 is a reply to message #651481]

Mon, 31 January 2011 13:02

Chris Delahunt

Messages: 1389
Registered: July 2009

Senior Member

Hello,

I cannot see any obvious issues with the entities, other than using cascade.persist with cascade.all unneccessarily. Calling grupotelefone_id = new GrupoTelefone(); within ClienteFornecedor might cause extra GrupoTelefone entities to be persisted, but I'm not sure its related to this problem.

Can you post the code you are using to persist and commit these entities, as well as the log with the <property name="eclipselink.logging.level" value="FINEST"/> property set?

Best Regards,
Chris

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Re: can't create a new object [message #651513 is a reply to message #651500]

Mon, 31 January 2011 13:57

Luiz E.

Messages: 100
Registered: September 2010

Senior Member

here is how i persist:
http://pastie.org/1514673
i persist with saveOrUpdate method (not the persistEntity!)
but call new GrupoTelefone didn't cause any extra entities persisted.

here's my configuration of entityManager: http://pastie.org/1514676

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Re: can't create a new object [message #651545 is a reply to message #651481]

Mon, 31 January 2011 15:44

James Sutherland

Messages: 1939
Registered: July 2009
Location: Ottawa, Canada

Senior Member

I'm not sure it is possible to insert into a table with no columns in it, other than a generated id. Perhaps add another field, or do not use IDENTITY id generation, use TABLE or SEQUENCE instead.

I checked, and on MySQL at least an empty insert is possible with an identity column, so I think you are correct, and we should not be throwing this error. Please log a bug for this and vote for it.

James : Wiki : Book : Blog : Twitter

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