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sykesd
 Post subject: Strategy for calculated columns
PostPosted: Tue Nov 02, 2004 9:36 am 
Newbie

Joined: Tue Nov 02, 2004 9:15 am
Posts: 5
Hibernate version:
2.1.4

Full stack trace of any exception that occurs:
Quote:
com.franke.pbs.persistence.PersistenceException: Could not apply configuration
at com.franke.pbs.persistence.HibernatePersistenceManager.setConfiguration(HibernatePersistenceManager.java:143)
at com.franke.pbs.persistence.HibernatePersistenceManager.init(HibernatePersistenceManager.java:152)
at com.franke.pbs.persistence.HibernatePersistenceManager.<init>(HibernatePersistenceManager.java:52)
at com.franke.pbs.persistence.TestHibernatePersistenceManager.setUp(TestHibernatePersistenceManager.java:41)
Caused by: net.sf.hibernate.MappingException: discriminator mapping required for polymorphic persistence
at net.sf.hibernate.persister.EntityPersister.<init>(EntityPersister.java:734)
at net.sf.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:42)
at net.sf.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:137)
at net.sf.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:768)
at com.franke.pbs.persistence.HibernatePersistenceManager.setConfiguration(HibernatePersistenceManager.java:137)
... 12 more


Name and version of the database you are using:
Oracle 9.2.0.5


I have a object/table mapping which works correctly. Table: ORDER_HEADER, Class: OrderHeader

I have some stored functions that provide me with some (expensive to calculate) additional status information for a record in the ORDER_HEADER table.

I have been trying to use a <subclass> mapping to define these additional properties, so that they only get loaded (and calculated) when I need them. The problem, obviously, is that I don't have a discriminator column for this situation.

Is there anyway to achieve what I want without resorting to defining the complete mapping again?

Thanks in advance for any info,
David Sykes
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anthony
 Post subject:
PostPosted: Tue Nov 02, 2004 11:53 am 
Hibernate Team
Hibernate Team

Joined: Thu Dec 18, 2003 9:55 am
Posts: 1977
Location: France
not exactly what you need but may help
http://www.hibernate.org/41.html

_________________
Anthony,
Get value thanks to your skills: http://www.redhat.com/certification

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sykesd
 Post subject: Thanks
PostPosted: Tue Nov 02, 2004 12:40 pm 
Newbie

Joined: Tue Nov 02, 2004 9:15 am
Posts: 5
Anthony,

thanks for the reply. Not exactly what I want, but certainly extremely close to it.
I think I should be able to work something from here. At least to get me going.

Thanks again,
David Sykes
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