I've studied one to one relations and i think the error is not because of that.
This is an example in my model. @Entity @Table(name="usuarioDetalles") public class UsuarioDetallesEJB { private UsuarioEJB idusuario; private String nombre; private String apellidos; ................. private String pais; private String codigoPostal; private String observaciones; private Calendar creacion; public UsuarioDetallesEJB () {} ................................ @Id @OneToOne @JoinColumn(name="idUsuario") public UsuarioEJB getIdUsuario() { return this.idusuario; } --------------------------------------------------------------- @Entity @Table(name="usuario") public class UsuarioEJB { ................... @OneToOne(mappedBy="idUsuario") public UsuarioDetallesEJB getUsuariodetalles() { return usuariodetalles; } ..................... Thanks Felix!! Do you speak spanish? it would be fine!!! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4042365#4042365 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4042365 _______________________________________________ jboss-user mailing list jboss-user@lists.jboss.org https://lists.jboss.org/mailman/listinfo/jboss-user