Hi Craig, Thanks for the reply.
Craig L Russell wrote: > >> Is there a way to change the primary key of an entity in OpenJPA? The >> expection below doesn't fill me with hope... > > The JPA specification 2.1.4 says that the application must not change > the value of a primary key, but the specific behavior is not defined. > So OpenJPA is spec compliant. > That's what I was worried about. Actually, I was able to implement the behaviour I needed by using a bulk UPDATE to change the key, and making sure the foreign keys were set up correctly (i.e. CASCADE). I guess that being able to do this is technically a bug in OpenJPA, but please don't fix it! > That said, there are cases I've seen where changing a primary key is > useful. So I would not oppose a proposal to add the feature to OpenJPA. > > By the way, JDO doesn't prohibit it; there is a specific optional > feature to allow this. But an implementation has to choose to support > it. > Adding it to OpenJPA would be a nice start, although adding it to the JPA spec would be better (along with the rest of the JDO 2.0 that is!) Cheers, Roger > > <4|false|0.9.6-incubating> > org.apache.openjpa.persistence.InvalidStateException: Attempt to > change a > primary key field of an instance that already has a final object > id. Only > new, unflushed instances whose id you have not retrieved can have > their > primary keys changed. FailedObject: > [EMAIL PROTECTED] > > > org.apache.openjpa.kernel.StateManagerImpl.assertNoPrimaryKeyChange > (StateManagerImpl.java:1819) > > org.apache.openjpa.kernel.StateManagerImpl.settingStringField > (StateManagerImpl.java:1800) > figbird.lists.entities.Email.pcSetemail(Email.java) > figbird.lists.entities.Email.setEmail(Email.java:36) > ... > -- > View this message in context: http://www.nabble.com/change-primary- > key-value--tf3244417.html#a9018988 > Sent from the open-jpa-dev mailing list archive at Nabble.com. > Craig Russell Architect, Sun Java Enterprise System http://java.sun.com/products/jdo 408 276-5638 mailto:[EMAIL PROTECTED] P.S. A good JDO? O, Gasp! -- View this message in context: http://www.nabble.com/change-primary-key-value--tf3244417.html#a9076663 Sent from the open-jpa-dev mailing list archive at Nabble.com.
