Hi, I need to define a unique constraint on foreign keys in a EJB3 entity. I saw the @Table annotation has a uniqueConstraints attribute to do this, but when I add relation columns to the unique constraint, it can't find them. For example, my entity has the following relations : @javax.persistence.ManyToOne(optional = false) | @javax.persistence.JoinColumn(name = "NOEUD_ORGANISATION_FK") | public xxx.core.utilisateur.NoeudOrganisation getNoeudOrganisation() | { | return this.noeudOrganisation; | } | | @javax.persistence.ManyToOne(optional = false) | @javax.persistence.JoinColumn(name = "EMPLOYE_FK") | public xxx.core.utilisateur.Employe getEmploye() | { | return this.employe; | } To define a unique constraint on these columns, I added the following annotation to the class : @javax.persistence.Entity | @javax.persistence.Table( | name = "UNITE_EMPLOYE", | uniqueConstraints = {(a)javax.persistence.UniqueConstraint(columnNames = {"employe", "noeudOrganisation"})}) | public class UniteEmploye { | } | But I have the following error : ERROR 10-10 11:48:23,656 (KernelErrors.java:validate:78) -Failed deployment: persistence.units:jar=classes.jar,unitName=t4Seam | org.hibernate.MappingException: Unable to find column with logical name: UNITE_EMPLOYE.employe | at org.hibernate.cfg.Mappings.getPhysicalColumnName(Mappings.java:493) | at org.hibernate.cfg.AnnotationConfiguration.buildUniqueKeyFromColumnNames(AnnotationConfiguration.java:488) | at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:310) | at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1039) | at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1015) | at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:154) | at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:751) | at org.hibernate.ejb.Ejb3Configuration.createContainerEntityManagerFactory(Ejb3Configuration.java:350) | at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:119) | at org.jboss.ejb3.entity.PersistenceUnitDeployment.start(PersistenceUnitDeployment.java:264) | How should I do this ? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4093401#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...