1 Reply Latest reply on May 3, 2007 8:19 PM by Sergey Smirnov

    Dependent h:selectOneMenu problem

    Jose Miguel Loor Apprentice


      I am trying to make two interdependent selectOneMenu objects, but i must be missing something because in every example i see, there is not much code involved but i can't get it to work

      this is the code in the page:

       <h:form id="agenciaForm">
       <a4j:outputPanel ajaxRendered="true">
       <h:messages errorClass="errorMessageStyle" infoClass="infoMessageStyle" showDetail="true" showSummary="false" layout="table"/>
       <h:panelGrid columns="2">
       <h:outputLabel value="Provincia:" styleClass="normal"/>
       <h:selectOneMenu id="provincia" value="#{agenciaManager.provincia}" title="Provincia" styleClass="normal">
       <f:selectItem itemValue="" itemLabel="Seleccione" />
       <f:selectItems value="#{agenciaManager.provincias}"/>
       <a4j:support id="provinciaSupport" event="onchange" reRender="canton" immediate="true"/>
       <h:outputLabel value="Ciudad:" styleClass="normal"/>
       <h:selectOneMenu id="canton" value="#{agenciaManager.canton}" title="Canton" styleClass="normal">
       <f:selectItem itemValue="" itemLabel="Seleccione" />
       <f:selectItems value="#{agenciaManager.cantones}"/>

      The a4j:support is immediate="true" because in the form, i have some required objects

      This is the backingBean code:
       private String provincia;
       private String canton;
       public SelectItem[] getProvincias(){
       List<Provincia> provincias = provinciaServiceDelegate.findAllSort();
       SelectItem items[] = new SelectItem[provincias.size()];
       int i = 0;
       for (Provincia provincia : provincias) {
       items = new SelectItem(provincia.getProvinciaPK().getProvincia(), provincia.getDescripcion());
       return items;
       public SelectItem[] getCantones() {
       System.out.println("getCantones >>> provincia >>> " + provincia);
       SelectItem items[] = new SelectItem[0];
       if (provincia != null && !provincia.equals("")) {
       ProvinciaPK pk = new ProvinciaPK();
       List<Canton> cantones = cantonServiceDelegate.findByProvincia(pk);
       items = new SelectItem[cantones.size()];
       int i = 0;
       for(Canton canton : cantones) {
       items = new SelectItem(canton.getArcccanPK().getCanton(), canton.getDescripcion());
       return items;

      the thing is that i want the canton h:selectOneMenu to be refreshed when i select a provincia h:selectOneMenu

      but the problem is that when the getCantones method is triggered the provincia value is always null, so i dont find any related cantones (its a parent-child relation)

      what am i missing ??

      is there any complete example that i can follow ??

      thanks a lot