@AttributeOverride works in @Entity, not @MappedSuperclass?

bunglebungle · **Joined:** Fri Mar 25, 2005 1:16 pm **Posts:** 13

Hibernate version: 3.1.1 w/ Annotations 3.1beta8

Is AttributeOverride only for use on leaf classes? I have 3 levels of inheritance, say Foo<-Bar<-[X and Y]. I have a property in Foo that I want to override the size for in Bar, so it affects X and Y, but not everything else that extends Foo. However, as of right now, I have to use the AttributeOverride declaration in both X and Y, which are both @Entity. It has no effect when used in Bar, which is @MappedSuperclass - the values from Foo are used instead.

Is this by design, or is this something that should be supported?

Thanks
John

emmanuel · **Posted:** Wed Feb 01, 2006 4:59 am

show me a simplified failing mapping

bunglebungle · **Joined:** Fri Mar 25, 2005 1:16 pm **Posts:** 13

Code:

@MappedSuperclass
public class BaseAuditedExternalIdItem extends AuditedIdItem implements ExternalItem {
    private String _externalId;
    
    @Column(name="externalId", nullable=false, length=30)
    public String getExternalId() {
        return _externalId;
    }
}

Code:

@MappedSuperclass
//doesn't work//@AttributeOverride( name="externalId", column = @Column(nullable=false, length=50) )
public abstract class WorkOrderUpdate extends BaseAuditedExternalIdItem {

}

Code:

@Entity
@AttributeOverride( name="externalId", column = @Column(nullable=false, length=50) )
public class OrderUpdate extends WorkOrderUpdate  {
}

Code:

@Entity
@AttributeOverride( name="externalId", column = @Column(nullable=false, length=50) )
public class LoadUpdate extends WorkOrderUpdate {
}

I'd like to just have the AttributeOverride in WorkOrderUpdate, since I want it to be 50 in both LoadUpdate and OrderUpdate. However, I could only get it to work when overriding in LoadUpdate and OrderUpdate, not WorkOrderUpdate. (When I say "work", I mean getting 50 as the column length from AnnotationConfiguration.getTableMappings().)

emmanuel · **Posted:** Wed Feb 01, 2006 8:13 pm

open a JIRA issue, I'll look at that. A patch fixing it would be even better :-)

bunglebungle · **Joined:** Fri Mar 25, 2005 1:16 pm **Posts:** 13

emmanuel wrote:

open a JIRA issue, I'll look at that. A patch fixing it would be even better :-)

Okay - I didn't want to open a JIRA issue if that was in the spec or something. I'll see about it Monday, though I haven't looked much at the Annotations code much yet.