Hi,

I have the following mappings for a 'public abstract class Mob' and its subclass 'Sequence'. Somehow I can't seem to get this to fly with 3.1.{2,3}. Can somebody please comment?

Thanks.


<hibernate-mapping default-access="field">
<class name="Mob"
table="mobs"
discriminator-value="untyped">

<cache usage="nonstrict-read-write"/>

<id name="id" type="long">
<generator class="native"/>
</id>

<version name="version"/>

<property name="mobId" not-null="true" index="mob_mobid_index"/>

</class>

<subclass name="Sequence"
extends="Mob"
discriminator-value="sequence"/>

<query name="findSequencesByMobIds">
from Sequence seq
where seq.mobId in (:mobids)
</query>
</hibernate-mapping>


org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in file [/home/tom/projects/nxn-software.com/wog/sandbox/build/wog-exp/WEB-INF/classes/com/avid/wog/spring-hibernate.xml]: Invocation of init method failed; nested exception is org.hibernate.MappingException: No discriminator found for Sequence. Discriminator is needed when 'single-table-per-hierarchy' is used and a class has subclasses
org.hibernate.MappingException: No discriminator found for Sequence. Discriminator is needed when 'single-table-per-hierarchy' is used and a class has subclasses
at org.hibernate.mapping.SingleTableSubclass.validate(SingleTableSubclass.java:41)
at org.hibernate.cfg.Configuration.validate(Configuration.java:984)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1169)
at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:871)

You have not declared your discriminator column.

Add something like

<discriminator column="mob_type"/>

after your <id/>

Thanks. That worked.

Good, I would be grateful if you could rate my post :). Otherwise I'm soon out of questions here.