Hello!

I've the following problem when creating a table for MetaDataUpdates..

Hibernate: insert into MetadataUpdate_KiWiExtendedTriple (MetadataUpdateId, currentTripleId) values (?, ?)
ERROR [org.hibernate.util.JDBCExceptionReporter] Field 'prevTripleId' doesn't have a default value

The insert statement should normally insert 3 values: MetadataUpdateId, currentTripleId and prevTripleId. currentTriple and prevTriple are both persisted in the Database. After persisting MetadataUpdate (and em.flush), the above error is printed.

Here's my MetadataUpdate class:

package kiwi.model.revision;

import java.io.Serializable;

@Entity
public class MetadataUpdate extends KiWiUpdate implements Serializable {

     /**
      * 
      */
     private static final long serialVersionUID = 1157304931584263193L;
     
     @OneToOne
     private KiWiSpecialResource resource;
     
     private Date date;

     /* TripleStore - Metadata */
     @OneToMany(cascade={CascadeType.PERSIST})
     private Set<KiWiExtendedTriple> prevTriple;
     @OneToMany(cascade={CascadeType.PERSIST})
     private Set<KiWiExtendedTriple> currentTriple;
     
     @ManyToOne
     private Revision revision;
     
     public MetadataUpdate() {
          
     }

     /**
      * @return the currentTriple
      */
     public Set<KiWiExtendedTriple> getCurrentTriple() {
          return currentTriple;
     }

     /**
      * @param currentTriple the currentTriple to set
      */
     public void setCurrentTriple(Set<KiWiExtendedTriple> currentTriple) {
          this.currentTriple = currentTriple;
     }

     /**
      * @return the prevTriple
      */
     public Set<KiWiExtendedTriple> getPrevTriple() {
          return prevTriple;
     }

     /**
      * @param prevTriple the prevTriple to set
      */
     public void setPrevTriple(Set<KiWiExtendedTriple> prevTriple) {
          this.prevTriple = prevTriple;
     }
        
        [...]
}

And that's my KiWiExtendedTriple class:

@Entity
public class KiWiExtendedTriple  implements Serializable {
    
     /**
      * 
      */
     private static final long serialVersionUID = -8726615974625660845L;

     @Id
     @DocumentId
     @GeneratedValue(strategy=GenerationType.TABLE)
     private Long id;
     
     @Transient
        KiWiTripleStore context;
    
        @OneToOne(cascade={CascadeType.PERSIST})
        KiWiResource    subject;
        @OneToOne(cascade={CascadeType.PERSIST})
        KiWiUriResource property;
        @OneToOne(cascade={CascadeType.PERSIST})
        KiWiNode        object;
    
        @OneToOne(cascade={CascadeType.PERSIST})
        KiWiResource tripleId;

        @OneToOne
        User  author;
    
    
    
   public KiWiExtendedTriple(KiWiTripleStore context, KiWiResource subject, KiWiUriResource property, KiWiNode object) {
        this.context = context;
        this.subject = subject;
        this.property = property;
        this.object   = object;
        this.tripleId = context.createAnonResource();
    }

   public KiWiExtendedTriple(KiWiTripleStore context, KiWiResource subject, KiWiUriResource property, KiWiNode object, KiWiUriResource tripleId) {
        this.context = context;
        this.subject = subject;
        this.property = property;
        this.object   = object;
        this.tripleId = tripleId;
    }

    [...]
}

Can someone help me figuring out what I did wrong?