Problem with @DataModelSelection

[mapoitras]

I am having problems synchronizing the @DataModelSelection with @Datamodel.  When I load the page, the list is displayed but when I select a value, it is not being transfered to the DataModelSelection value.  If I click on a second item in the list I get
`
javax.el.PropertyNotFoundException: /forms/contactInfoDetailsSubFrm.xhtml @143,137 value="#{applicationContactSelected.contact.lastName}": Target Unreachable, identifier 'applicationContactSelected' resolved to null
`

Here is the the relevant part of the back end bean which is part of a long running conversation.


`@Stateful
@Scope(ScopeType.CONVERSATION)
@Name("contactDetails")
public class ContactInfoDetailsImpl extends FormCore implements ContactInfoDetails, Serializable {

    @RequestParameter
    Long contactId;
   
    private Boolean isBeingCreated = false;
    private Boolean isBeingEdited = false;
    private Boolean isReadModeRendered;
    private Boolean isAddRowButtonEnabled;
    private boolean isSaveBtnDisabled=true;
    private boolean showAdressMandatoryFields = false;
   
    @DataModel
    private List<ApplicationContact> applicationContacts;

    @DataModelSelection
    private ApplicationContact applicationContactSelected;
        
     
    @Factory("applicationContacts")     
        public void findApplicationContacts() {
         if (applicationContacts==null){
              applicationContacts=getCurrApplication().getApplicationContacts();
       }
   }
   
     @Create
    public void create() {

         
         //clear any messages
         getFacesMessages().clear();
         
        loadAllPickLists();
     isAddRowButtonEnabled = true;
     isBeingCreated=false;
     isBeingEdited=false;
    }
   

     public String addRowAction() {
     isBeingCreated = true;
     isBeingEdited = false;
     isAddRowButtonEnabled = false;

     ApplicationContact applicationContact = createApplicationContact();   
     applicationContacts.add(applicationContact);
     applicationContactSelected = applicationContact;
       
     return "addRow";
     }
     
     public String editRowAction() {
          isBeingEdited = true;
          isAddRowButtonEnabled = false;
          isBeingCreated = false;
          provinceName = "";
          showAdressMandatoryFields = false;


          return "editRow";
     }

........

}`


This is how I created the list


`<h:dataTable value="#{applicationContacts}" var="contactApplicantVar"
     styleClass="view" headerClass="viewHeader"
     rowClasses="viewRows"
     columnClasses="viewCIType,viewCIOrgNames,viewCIBusTel,viewCIResTel">

   <h:column>
    <f:facet name="header">#{messages.ciTypeLbl}</f:facet>
    <h:commandLink id="contactId" action="#{contactDetails.editRowAction()}">

      <h:outputText value="#{contactApplicantVar.contactTypeCode.description.localizedDescription}"/>
    </h:commandLink>
   </h:column>`

And i reference the selected item for the "Detail" part of the screen like this.


`<div class="fullWidth">
     <label class="slength2">&#160;&#160;#{messages.ciResTelLbl}&#58;</label>
     <span><h:inputText id="resPhoneID" value="#{applicationContactSelected.contact.residentialTelephone}" maxlength="10" size="11" validator="#{contactDetails.validatePhoneNumber}"/></span>
</div>

<div class="fullWidth">
     <label class="slength2">&#160;&#160;#{messages.ciCellPhoneLbl}&#58;</label>
     <span><h:inputText id="cellPhoneID" value="#{applicationContactSelected.contact.cellTelephone}" maxlength="10" size="11" validator="#{contactDetails.validatePhoneNumber}"/></span>
</div>
<div class="fullWidth">
     <label class="slength2">&#160;&#160;#{messages.ciFaxLbl}&#58;</label>
     <span><h:inputText id="faxPhoneID" value="#{applicationContactSelected.contact.fax}" maxlength="10" size="11" validator="#{contactDetails.validatePhoneNumber}"/></span>
</div>`

And this is the whole xhtml. ( I removed some of the javascript to make it shorter and easier to read.)



`<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
    xmlns:s="http://jboss.com/products/seam/taglib"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:c="http://java.sun.com/jstl/core"
    xmlns:a4j="https://ajax4jsf.dev.java.net/ajax"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:rich="http://richfaces.org/rich">
   
<fieldset>
     <span class="length330">
          <label><strong class="required"><h:outputText id="isApplicantID" value="*" /></strong>
                         <h:outputText value="#{messages.ciIsTheFirstNationTheApplicantLbl}" />
          </label>
          <span>
               <h:outputText rendered="#{contactDetails.isFirstNationApplicant}"
                                   value="#{messages.ciYes}" />
               <h:outputText rendered="#{not contactDetails.isFirstNationApplicant}"
                                   value="#{messages.ciNo}" />
          </span>
     </span>
                              
     <span class="lllonglength400">
          <label>#{messages.ciFirstNationNameLbl}&#58;</label>
          <span><h:outputText value="#{contactDetails.firstNationName}" /></span>
     </span>
</fieldset>
          
<h:messages globalOnly="true" showSummary="true" showDetail="false" layout="table" styleClass="ahMessages" errorStyle="ahMessagesError" fatalStyle="ahMessagesError" infoStyle="ahMessagesInfo" warnStyle="ahMessagesInfo" />
                         
<a4j:log hotkey="M" />
     <fieldset>

          <legend><h:outputText value="#{messages.ciListOfContactsHeaderLbl}&#160;&#160;"></h:outputText>
                    <h:commandButton onclick="javascript: return checkAuthority(#{contactDetails.authorizationMap['09']});"
                                         action="#{contactDetails.addRowAction()}"
                                          value="#{messages.ciAddContactBtn}"
                                         disabled="#{not contactDetails.isAddRowButtonEnabled or contactDetails.isSaveBtnDisabled}" /></legend>

          <h:dataTable value="#{applicationContacts}" var="contactApplicantVar"
                         styleClass="view" headerClass="viewHeader"
                         rowClasses="viewRows"
                         columnClasses="viewCIType,viewCIOrgNames,viewCIBusTel,viewCIResTel">

               <h:column>
                    <f:facet name="header">#{messages.ciTypeLbl}</f:facet>
                    <h:commandLink id="contactId" action="#{contactDetails.editRowAction()}">

                              <h:outputText value="#{contactApplicantVar.contactTypeCode.description.localizedDescription}"/>
                    </h:commandLink>
               </h:column>

               <h:column>
                    <f:facet name="header">#{messages.ciOrgLFNameLbl}</f:facet>
                    <h:outputText value="#{contactApplicantVar.application.firstNation.description.localizedDescription}&#160;&#47;&#160;" rendered="#{contactApplicantVar.isApplicant and contactDetails.isFirstNationApplicant}"/>
                    <h:outputText value="#{contactApplicantVar.contact.lastName}" />
                    <h:outputText value="&#160;&#44;&#160;#{contactApplicantVar.contact.firstName}" />
               </h:column>

               <h:column>
                    <f:facet name="header">#{messages.ciBusTelLbl}</f:facet>
                    <h:outputText value="#{contactApplicantVar.contact.formattedBusinessTelephone}" />
               </h:column>

               <h:column>
                    <f:facet name="header">#{messages.ciResTelLbl}</f:facet>
                    <h:outputText value="#{contactApplicantVar.contact.formattedResidentialTelephone}" />
               </h:column>

          </h:dataTable>

     </fieldset>

     

     
     <c:choose>
            <c:when test="${contactDetails.rowEditable}">
                 <fieldset class="noborder">
                      <div>
                    <label><strong class="required">*</strong>#{messages.ciContactTypeLbl}&#58;</label>
                    <span><h:selectOneMenu class="sfont ignoreForHash" value="#{applicationContactSelected.contactTypeCode}"
                                     converter="#{contactDetails.contactTypeCodePickList.converter}"
                                     disabled="#{not contactDetails.isBeingCreated}">
                                   <f:selectItems value="#{contactDetails.contactTypeCodePickList.pickListMap}" />
                                             <a4j:support event="onchange" action="#{contactDetails.changeContactTypeCodeAction}" reRender="cifna,ciAddr" />
                         </h:selectOneMenu>
                    </span>
                    <span>
                         <h:commandButton id="crudCancelId" action="#{contactDetails.cancelAction}" onclick="dontDisplayWarning()" value="#{messages.cmnCancelBtn}"
                                   rendered="#{contactDetails.isBeingCreated or contactDetails.isBeingEdited}" immediate="true"/>
                    </span>
                    <span><h:commandButton id="crudDeleteId" onclick="javascript: return checkAuthority(#{contactDetails.authorizationMap['09']});"
                                   action="#{contactDetails.removeRowAction}"
                                   rendered="#{contactDetails.isBeingEdited}" value="#{messages.cmnDeleteBtn}"
                                   disabled="#{not contactDetails.isDeleteEnabled or contactDetails.isSaveBtnDisabled}"/>
                    </span>
                    </div>
               </fieldset>
               
               <fieldset class="spfset">
                    <legend><h:outputText value="#{messages.ciContactInfoDetailsTtlLbl}" />
                    </legend>
                    
                    <h:panelGroup id="cifna">
                         
                         <div>
                              <label class="slength2"><strong class="required">*</strong>#{messages.ciLastNameLbl}&#58;</label>
                              <span class="sfont"><h:inputText id="lastNameID" value="#{applicationContactSelected.contact.lastName}" maxlength="48" size="30"/></span>
                         </div>
                         <div>
                              <label class="slength2"><strong class="required">*</strong>#{messages.ciFirstNameLbl}&#58;</label>
                              <span class="sfont"><h:inputText id="firstNameID" value="#{applicationContactSelected.contact.firstName}" maxlength="25" size="30" /></span>
                         </div>
                         
                         <div class="fullWidth">
                              <c:choose>
                                   <c:when test="${applicationContactSelected.isApplicant}">
                                        <label class="slength2"><strong class="required">*</strong>#{messages.ciBusTelLbl}&#58;</label>
                                   </c:when>
                                   <c:otherwise>
                                        <label class="slength2">&#160;&#160;#{messages.ciBusTelLbl}&#58;</label>
                                   </c:otherwise>
                              </c:choose>
                              <span><h:inputText id="busPhoneID" value="#{applicationContactSelected.contact.businessTelephone}" maxlength="10" size="11" validator="#{contactDetails.validatePhoneNumber}"/></span>
                              <label>#{messages.ciExtensionLbl}&#58;</label>
                              <span><h:inputText id="busExtID" value="#{applicationContactSelected.contact.businessTelephoneExtension}" maxlength="10" size="7" validator="#{contactDetails.validateExtension}"/></span>
                         </div>
                         <div class="fullWidth">
                              <label class="slength2">&#160;&#160;#{messages.ciResTelLbl}&#58;</label>
                              <span><h:inputText id="resPhoneID" value="#{applicationContactSelected.contact.residentialTelephone}" maxlength="10" size="11" validator="#{contactDetails.validatePhoneNumber}"/></span>
                         </div>
                         
                         <div class="fullWidth">
                              <label class="slength2">&#160;&#160;#{messages.ciCellPhoneLbl}&#58;</label>
                              <span><h:inputText id="cellPhoneID" value="#{applicationContactSelected.contact.cellTelephone}" maxlength="10" size="11" validator="#{contactDetails.validatePhoneNumber}"/></span>
                         </div>
                         <div class="fullWidth">
                              <label class="slength2">&#160;&#160;#{messages.ciFaxLbl}&#58;</label>
                              <span><h:inputText id="faxPhoneID" value="#{applicationContactSelected.contact.fax}" maxlength="10" size="11" validator="#{contactDetails.validatePhoneNumber}"/></span>
                         </div>                         
                         <div class="fullWidth">
                              <label class="slength2">&#160;&#160;#{messages.ciEmailLbl}&#58;</label>
                              <span><h:inputText id="emailID" value="#{applicationContactSelected.contact.emailString}" maxlength="250" size="30" validator="#{contactDetails.validateEmail}"/></span>
                         </div>
                         <div style="margin: 2px 0; width: 100%;">
                              <c:choose>
                                   <c:when test="${applicationContactSelected.isApplicant}">
                                        <label class="slength2"><strong class="required">*</strong>#{messages.ciLanguageLbl}&#58;</label>
                                   </c:when>
                                   <c:otherwise>
                                        <label class="slength2">&#160;&#160;#{messages.ciLanguageLbl}&#58;</label>
                                   </c:otherwise>
                              </c:choose>
                              <span><h:selectOneMenu class="sfont" id="languageID" value="#{applicationContactSelected.contact.languageCode}"
                                             converter="#{contactDetails.languageCodePickList.converter}" >
                                             <f:selectItems value="#{contactDetails.languageCodePickList.pickListMap}" />
                                        </h:selectOneMenu>
                              </span>
                         </div>
                    </h:panelGroup>
               </fieldset>
          
          </c:when>
     </c:choose>
               <h:panelGroup id="ciAddr">
     <c:choose>
            <c:when test="${contactDetails.isAddressVisible}">
                    <fieldset class="spfset">
                         <legend><h:outputText value="#{messages.ciContactAddrDetailsTtlLbl}" /></legend>
                         
                         <div class="fullWidth">
                              <label class="slength6">&#160;&#160;#{messages.ciStreetNoLbl}&#58;</label>
                              <span><h:inputText id="streetNumId" value="#{applicationContactSelected.mailingOccupantAddressContact.address.streetNum}" size="7" maxlength="7" validator="#{fieldValidator.validateStreetNumber}"/></span>
                         </div>
                         <div class="fullWidth">
                              <label class="slength6"><strong class="required"><h:outputText value="*" rendered="#{contactDetails.showAdressMandatoryFields}"></h:outputText></strong>
                              <h:outputText value="&#160;&#160;" rendered="#{!contactDetails.showAdressMandatoryFields}"></h:outputText>#{messages.ciStreetNameLbl}&#58;</label>
                              <span><h:inputText id="streetNameId" value="#{applicationContactSelected.mailingOccupantAddressContact.address.streetName}" size="30" maxlength="30" validator="#{fieldValidator.validateStreetName}"/></span>
                         </div>
                         <div style="margin: 1.5px 0; width: 100%;">
                              <label class="slength6">&#160;&#160;#{messages.ciStreetTypeLbl}&#58;</label>
                              <span><h:selectOneMenu class="sfont" value="#{applicationContactSelected.mailingOccupantAddressContact.address.streetTypeCode}"
                                          converter="#{contactDetails.streetTypeCodePickList.converter}" >
                                        <f:selectItems value="#{contactDetails.streetTypeCodePickList.pickListMap}" />
                                        </h:selectOneMenu>
                              </span>
                         </div>
                         <div style="margin: 2px 0 1.5px 0; width: 100%;">
                              <label class="slength6">&#160;&#160;#{messages.ciStreetDirLbl}&#58;</label>
                              <span><h:selectOneMenu class="sfont" value="#{applicationContactSelected.mailingOccupantAddressContact.address.streetDirectionCode}"
                                          converter="#{contactDetails.streetDirectionCodePickList.converter}" >
                                        <f:selectItems value="#{contactDetails.streetDirectionCodePickList.pickListMap}" />
                                        </h:selectOneMenu>
                              </span>
                         </div>
                         <div class="fullWidth">
                              <label class="slength6">&#160;&#160;#{messages.ciAptUnitNoLbl}&#58;</label>
                              <span><h:inputText value="#{applicationContactSelected.mailingOccupantAddressContact.address.unitNum}" size="7" maxlength="6" validator="#{fieldValidator.validateAptUnitNumber}"/></span>
                         </div>
                         <div class="fullWidth">
                              <label class="slength6"><strong class="required"><h:outputText value="*" rendered="#{contactDetails.showAdressMandatoryFields}"></h:outputText></strong>
                              <h:outputText value="&#160;&#160;" rendered="#{!contactDetails.showAdressMandatoryFields}"></h:outputText>#{messages.ciMunicipalityLbl}&#58;</label>
                              <span><h:inputText value="#{applicationContactSelected.mailingOccupantAddressContact.address.municipality}"  maxlength="20" size="30" validator="#{fieldValidator.validateMunicipality}"/></span>
                         </div>
                         <div style="margin: 7px 0 5px 0; width: 100%;">
                              <label class="slength6">&#160;&#160;#{messages.ciProvinceLbl}&#58;</label>
                              <span><h:outputText id="provinceNameId" value="#{contactDetails.provinceName}"/></span>
                         </div>
                         <div class="fullWidth">
                              <label class="slength6"><strong class="required"><h:outputText value="*" rendered="#{contactDetails.showAdressMandatoryFields}"></h:outputText></strong>
                              <h:outputText value="&#160;&#160;" rendered="#{!contactDetails.showAdressMandatoryFields}"></h:outputText>#{messages.ciPostalCodeLbl}&#58;</label>
                              <span><h:inputText id="pdPostCode" value="#{applicationContactSelected.mailingOccupantAddressContact.address.postalCode}" size="7" maxlength="6" validator="#{fieldValidator.validatePostalCode}">
                              </h:inputText>
                              </span>
                         </div>
                    </fieldset>
          </c:when>
     </c:choose>
               </h:panelGroup>

<!-- TODO: Refactor to common CrudActionsSubFrm -->
     <div id="crudButtonsSubFrm">
          <div id="cmnButtons">
               <div class="row">

                    <span>
                         <h:commandButton id="crudSaveId" onclick="javascript: return doPost();"
                                             action="#{contactDetails.saveUpdateAction}" value="#{messages.cmnSaveBtn}"
                                             disabled="#{contactDetails.isSaveBtnDisabled}" rendered="#{contactDetails.isBeingCreated or contactDetails.isBeingEdited}"/>
                    </span>
                    
                    <span>
                         <h:commandButton id="crudSaveNextId" onclick="javascript: return doPost();"
                                             action="#{contactDetails.saveNextAction}" value="#{messages.cmnSaveNextBtn}"
                                             disabled="#{contactDetails.isSaveBtnDisabled}" />
                    </span>                    

     <!-- If save button is enabled then allow the "exit without save" message to be displayed (if needed) -->
          <ui:fragment rendered="#{!contactDetails.isSaveBtnDisabled}">               
                    <span><h:commandButton id="crudCloseId" action="#{contactDetails.closeAction}" immediate="true"
                         value="#{messages.cmnCloseBtn}" /></span>
          </ui:fragment>
     <!-- If save button is disabled then don't display the "exit without save" message -->
          <ui:fragment rendered="#{contactDetails.isSaveBtnDisabled}">
                    <span><h:commandButton id="crudClose2Id" action="#{contactDetails.closeAction}" onclick="saved = true" immediate="true"
                         value="#{messages.cmnCloseBtn}" /></span>
          </ui:fragment>
               </div>
          </div>
     </div>
<!-- End CRUD buttons -->

</ui:composition>`


Any idea or suggestions.  It appears that the row value is never set to DataModelSelection.

Any help would be appreciated

[clerum]

I believe you have to use a form to get the @DataModelSelection working

[mapoitras]

Yes, I have the form defined in the template.

<body onLoad="hashFormData()" onunload="displayPleaseWait()">
<div id="log"></div>
<h:form id="formId">
       
        <div id="maincontainer">
       
                <div id="header">
                        <ui:insert name="header">
                                <ui:include src="/common/header.xhtml" />
                                <div class="ht">
                                        <span>#{messages.hdMainContentLbl}</span>
                                </div>
                        </ui:insert>
                </div>

                <div id="sideMenu">
                        <ui:insert name="sideMenu">
                                <ui:include src="/common/sideMenu.xhtml" />
                        </ui:insert>
                </div>
       
                <div id="content">
                        <div class="contentBody">
                                <div id="cmnForm">

                                        <ui:insert name="content">
                                        </ui:insert>
                               
                                </div>
                                <div class="contentpleasewait" style="position:absolute; top: 100px; left: 300px; width: 250px;height: 100px; display: block; visibility: hidden;" >
                                        <font style="font-family: Verdana, Arial, Sans-serif; font-size: 12px;font-weight: bold; color: black;">#{messages.infPleaseWait}</font>
                                </div>
                        </div>
                </div>
               
                <div id="footer">
                        <ui:insert name="footer">
                                <ui:include src="/common/footer.xhtml" />
                        </ui:insert>
                </div>
               
        </div>
        <input type="hidden" name="formHashKey" id="formHashKey" value=""/>
</h:form>

</body>
</html>
</f:view>

[binnyg]

I see that your bean is conversational. Where are you starting your conversation and where does it end?

Add scope to your datamodel and see if it works.

@DataModel(scope = ScopeType.PAGE)
private List<ApplicationContact> applicationContacts;