[hibernate-issues] [Hibernate-JIRA] Created: (HHH-5677) Problem with ManyToOne to a unique key on merge when old value is null

[Marcial Atienzar (JIRA)]

Problem with ManyToOne to a unique key on merge when old value is null
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                 Key: HHH-5677
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5677
             Project: Hibernate Core
          Issue Type: Bug
          Components: annotations
    Affects Versions: 3.6.0
            Reporter: Marcial Atienzar


*Entity 1*:
{code}
@ManyToOne(fetch=FetchType.LAZY,cascade=CascadeType.REFRESH)
@JoinColumn(name = "UPC", referencedColumnName = "CLAVE_PRO",unique=false,insertable=false,updatable=false)		
private RhDatosPersonales upcRrhh;
{code}

*Entity 2*:
{code}
@Id
@Column(name = "NUM", nullable = false)
private BigDecimal num;

@Column(name = "CLAVE_PRO",unique=true,insertable=false,updatable=false,nullable=true)
private Long clavePro;
{code}

*Exception*
{code}
Caused by: java.lang.ClassCastException: org.kyrian.entity.rrhh.RhDatosPersonales cannot be cast to java.math.BigDecimal
	at org.hibernate.type.descriptor.java.BigDecimalTypeDescriptor.areEqual(BigDecimalTypeDescriptor.java:36)
	at org.hibernate.type.AbstractStandardBasicType.isEqual(AbstractStandardBasicType.java:183)
	at org.hibernate.type.AbstractStandardBasicType.isSame(AbstractStandardBasicType.java:168)
	at org.hibernate.type.AbstractStandardBasicType.isDirty(AbstractStandardBasicType.java:213)
	at org.hibernate.type.AbstractStandardBasicType.isDirty(AbstractStandardBasicType.java:205)
	at org.hibernate.type.ManyToOneType.isDirty(ManyToOneType.java:268)
	at org.hibernate.type.ManyToOneType.isDirty(ManyToOneType.java:277)
	at org.hibernate.type.TypeHelper.findDirty(TypeHelper.java:296)
	at org.hibernate.persister.entity.AbstractEntityPersister.findDirty(AbstractEntityPersister.java:3378)
	at org.hibernate.event.def.DefaultFlushEntityEventListener.dirtyCheck(DefaultFlushEntityEventListener.java:520)
	at org.hibernate.event.def.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEntityEventListener.java:230)
	at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:154)
	at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:219)
	at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:99)
	at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50)
	at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1216)
	at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:383)
	at org.hibernate.transaction.synchronization.CallbackCoordinator.beforeCompletion(CallbackCoordinator.java:117)
{code}



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