Question

i have a dataTble cotaining object of type Action , the user can choose ana action to modify it so i want to retrieve the old action before modifying it so i tried the onStart attribute to do it but i get this error:

oct. 15, 2012 11:42:12 AM 
 com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback visit 
 Grave: javax.el.PropertyNotFoundException: /manageProjectTestsPage.xhtml @342,417       
 onstart="#{projectTestManagementMB.initOldAction}": Property 'initOldAction' not found 
 on type tn.talan.testFramework.managedBean.ProjectTestManagementMB

here’s the code :

    public String initOldAction(){
     String index=(String)    

     FacesContext.getCurrentInstance().getExternalContext().
     getRequestParameterMap().get("index");
 System.out.println("index "+index);

  oldSelectedAction =testActionList.get(Integer.parseInt(index));
  return null;

}

xhtml:

 <p:column headerText="Options">  

     <p:commandLink id="modifyManualActionBtn" style="margin-right:5px"     onstart="# 
     {projectTestManagementMB.initOldAction}"  actionListener="#
      {projectTestManagementMB.verifyTestDisponibilityActionModifying}"  
      title="modify" update=":form:growl :form:testTabView:confirmModifyActionDialog 
      :form:testTabView:addModifyActionDlg" disabled="#
       {projectTestManagementMB.modifyBtnFlag}">
       <h:graphicImage value="../images/cssImg/modify_icon.png" heigth="13"width="17"/>
       <f:param name="index" value="#{rowIndex}" />
      </p:commandLink>
  ....

So how to use the onstart attribute to retrieve the old action value before executing the actionListener actionListener="#
{projectTestManagementMB.verifyTestDisponibilityActionModifying}"
And if i can not use it ,Is there another solution ?

Answer 1

You are retrieving this error because the onstart attribute is a value attribute that should be set to a Javascript expression to execute before the ajax request begins. You can use an EL expression here, however it is not like actionListener which expects a method expression.

By not having the parenthesis in the EL expression for onstart, JSF assumes this a call to a Managed Property rather than a method. Try this instead:

onstart="#{projectTestManagementMB.initOldAction()}"

This isn’t your actual problem however as your method initOldAction() doesn’t return a String containing a Javascript expression. I don’t think this attribute does what you think it does, it is just a client side callback.