When selecting two items from selectManyListbox I get the following validation error: anonymous wrote : Conversion Error setting value '7 9' for '#{workgroupSelectedStudents}'. Evidently person with Id 7 and 9 were selected, but what is causing this validation error? I tried overriding equals() and to match objects on their @Id field. This yielded the same result. Can anyone shed some light on this? I am deploying this on Jboss 4.2.0.GA and Seam 2.0.0.GA. addStudent.xhtml | <s:validateAll> | <h:outputLabel for="studentlist" value="Pick students" /> | <h:selectManyListbox id="studentlist" size="14" required="true" value="#{workgroupSelectedStudents}"> | <s:selectItems value="#{workgroupAvailableStudents}" var="student" label="#{student.firstName} #{student.prefix} #{student.lastName}"/> | <s:convertEntity/> | </h:selectManyListbox> | </s:validateAll> | WorkgroupStudentDetail.java | @Stateful | @Name("workgroupStudentManager") | @Scope(ScopeType.CONVERSATION) | @Conversational | public class WorkgroupStudentDetail implements WorkgroupStudentDetailInterface { | @In | private EntityManager entityManager; | | @In(required = false) | @Out(required = false) | private Collection<Person> workgroupAvailableStudents; | | @Out(required = false, scope = ScopeType.CONVERSATION) | private Collection<Person> workgroupSelectedStudents; | | @Begin (join = true, flushMode = FlushModeType.MANUAL) | @Factory("workgroupAvailableStudents") | public void findStudents() { | try { | workgroupAvailableStudents = (Collection<Person>) entityManager.createQuery("SELECT DISTINCT Object(per) FROM Person per").getResultList(); | } catch (Exception e) { | log.error("Exception occurred in findStudents() [WorkgroupStudentDetail].", e); | } | } | | // .. | } | Person.java | @Entity | @Table(name = "person") | public class Person implements Serializable { | | private static final long serialVersionUID = 7690407363935244693L; | private Long personId; | private School school; | private String firstName; | private String prefix; | private String lastName; | private Gender gender; | private Date dateOfBirth; | private String placeOfBirth; | private String mobile; | private String email; | private String nationality; | private String edexKey; | private String pgnoNumber; | private Date startDate; | private Date endDate; | private Boolean active; | private Boolean critical; | | @Override | public String toString() { | return getPersonId() == null ? null : getPersonId().toString(); | } | | @Id | @GeneratedValue(strategy = GenerationType.IDENTITY) | @Column(name = "person_id") | public Long getPersonId() { | return personId; | } | | protected void setPersonId(Long personId) { | this.personId = personId; | } | // .. | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4090258#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...