5 Replies Latest reply on Oct 4, 2007 4:33 AM by davidjoseph

[2.0.0.CR1] selectManyListbox + convertEntity yields convers

jeilong Oct 1, 2007 9:49 AM

When selecting two items from selectManyListbox I get the following validation error:

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;
 }
// ..

1. Re: [2.0.0.CR1] selectManyListbox + convertEntity yields con

jeilong Oct 1, 2007 9:57 AM (in response to jeilong)

Oops, meant to say "Deploying this with 2.0.0.CR1", not "2.0.0.GA"
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2. Re: [2.0.0.CR1] selectManyListbox + convertEntity yields con

pmuir Oct 1, 2007 10:14 AM (in response to jeilong)

Use

addStudent.xhtml

<s:validateAll>
 <h:outputLabel for="studentlist" value="Pick students" />
 <h:selectManyListbox id="studentlist" size="14" required="true" value="#{workgroupStudentManager.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;

 private Collection<Person> workgroupSelectedStudents;
 // Getters and setters for 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);
 }
 }

 // ..
}

3. Re: [2.0.0.CR1] selectManyListbox + convertEntity yields con

davidjoseph Oct 4, 2007 3:42 AM (in response to jeilong)

I have the same problem: I noticed then when I try to use a Collection for the selectmanyselectbox value, it won't call the setter method. If I use a List this seems to work fine. Is this wanted behaviour? After all a List is a Collection.

my code:

private Collection<SelectionItem> value;

 @ManyToMany(cascade = CascadeType.ALL)
 public Collection<SelectionItem> getValue() {
 if (value == null)
 value = new ArrayList<SelectionItem>();
 return value;
 }

 public void setValue(Collection<SelectionItem> value) {
 System.out.println("test");
 this.value = value;
 }

<h:selectManyListbox id="genderTrainee" value="#{coach.request.genderTrainee.value}" required="false">
 <s:selectItems value="#{selectionItemManager.findSelectionItemByType('GENDER')}"
 var="g" label="#{g.name}" noSelectionLabel="#{messages.no_selection_label}" />
 <s:convertEntity/>
</h:selectManyListbox>

if have the same kind of error:

Conversion Error setting value '42 43' for '#{coach.request.genderTrainee.value}'.

4. Re: [2.0.0.CR1] selectManyListbox + convertEntity yields con

pmuir Oct 4, 2007 4:21 AM (in response to jeilong)

Oops, I missed that one.

http://java.sun.com/javaee/javaserverfaces/1.2/docs/api/javax/faces/component/UISelectMany.html

You can back it with an [] or a List only.
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5. Re: [2.0.0.CR1] selectManyListbox + convertEntity yields con

davidjoseph Oct 4, 2007 4:33 AM (in response to jeilong)

Indeed, thx
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