Hi!

I've an application similar to the booking-example.
You can select an item from a list and go to a page to edit this item.

I have a stateful bean, from which the list is populated via @DataModel. I get back a @DatamodelSelction, which is a simple Bean, no Seam Component. In my JSP, I call an action method in another bean, which requests an EntityBean from the Database. I want to outject this row, but always get an

org.jboss.seam.RequiredException: Out attribute requires value for component: walzeedit.walze

Here is my code:
Entity Bean:

@Entity
@Name("walze")
@Table(name="WALZEN"
, uniqueConstraints = { }
)

public class Walzen implements java.io.Serializable {

.
.
.

List:

@Name("walzenuebersicht")
@Stateful
@Scope(ScopeType.SESSION)
@LoggedIn

public class WalzenUebersichtBean
 implements WalzenUebersicht {

 private String hydronummer = null;
 private String gruppe = null;

 @In (create=true)
 private EntityManager walzenDatabase;

 @DataModel
 private List<WalzenElement> walzenliste;

 @DataModelSelection
 WalzenElement selectedWalze;

 @Out(scope=ScopeType.CONVERSATION,required=false)
 Map<WalzenElement, Boolean> walzenSelection;

 @Factory("walzenliste")
 public void zeigeWalzen() {

.
.
 public WalzenElement getSelectedWalze() {
 return selectedWalze;
 }
.
.

EditBean:

@Name("walzeedit")
@Stateful
@LoggedIn

public class WalzeEditBean
 implements WalzeEdit{

 @In (create=true)
 private EntityManager walzenDatabase;

 @In
 private WalzenUebersicht walzenuebersicht;

 @Out
 private Walzen walze;

.
.
.


 @Begin
 public String aendern(){
 WalzenElement selectedWalze = walzenuebersicht.getSelectedWalze();
 walze = (Walzen) walzenDatabase.createQuery("SELECT w FROM Walzen w WHERE id = :id")
 .setParameter("id", selectedWalze.getId())
 .getSingleResult();
 return "editWalze";
 }

List JSP:

.
.
 <t:dataTable id="walzen" var="aktwalze" value="#{walzenliste}"
 styleClass="listtable" headerClass="listtablehead"
 rowClasses="oddrow,evenrow">
 <t:column styleClass="colCenter" style="width:5%;">
 <h:selectBooleanCheckbox value="#{walzenSelection[aktwalze]}" />
 </t:column>
 <t:column styleClass="colCenter" style="width:5%;">
 <h:commandLink id="aendern" value="#{aktwalze.id}"
 action="#{walzeedit.aendern}" />
 </t:column>
 <t:column styleClass="colLeft" style="width:10%;">
 <h:outputLabel value="#{aktwalze.hydronummer}" />
 </t:column>
.
.

Edit JSP:

.
.
 <table>
 <tr>
 <td style="width: 23%;"><h:outputLabel value="Walze : " /></td>
 <td style="width: 23%;"><h:outputLabel value="#{editWalze.id}" />
 </td>
 <td style="width: 4%;"></td>
 <td style="width: 24%;"></td>
 <td style="width: 24%;"></td>
 </tr>
 <tr>
 <td style="width: 24%;"><h:outputLabel value="Hydronummer" /></td>
 <td style="width: 24%;"><h:inputText
 value="#{editWalze.hydronummer}" size="20" maxlength="20"
 id="hydroNummer" /></td>
.
.

Can anybody help me?

If I set the required-Attribute of the Out-Parameter, the error disappears, but I can see the Outjected walze on the debugpage in a conversation-Context.

What am I doing wrong? Can anybody help me?

Thanks in advance

Stefan