SelectOneListBox strange behavior

[yasudevil]

Hi,

I'm having a strange behavior in my page.

I have a Entity that has a set as a parameter. Something like this.

@Name("User")
class User {
   Set<Car> cars;
}

On my page the set of childrens are represented as a Select listbox

<h:selectOneListbox>
     <s:selectItems value="#{user.cars}"
          var="_car" label="#{_car.name}" itemValue="#{_child}"/>
</h:selectOneListbox>

I input new cars on a input text box, click on Add button that triggers a action, and set a new car on the User object.

When I click add, the select box auto updates and the added value appears on my select box.

To remove a car I select the car on my select, call a action and removes it from the set on the User object. But in this call the select box doesn't updates.

All my buttons are

<a4j:commandLink action"#{myAction.addCar}">
<a4j:commandLink action"#{myAction.removeCar}">

Sometimes when I add a new car the same happens, the object is inserted on my collection but the object on-screen does not shows it.

For testing purposes I created another commandLink but without a action, when I click the new link the select box updates and shows the newly added Car or removes the previously removed Car.

I tried to put a a4j:outputPanel outside my select box and then put the outputPanel id as a reRender param on mine commandLink.

[francisco.affonso]

Hi Diego,

try something like:

<h:selectOneListbox id="someSelect">
     <s:selectItems value="#{user.cars}"
          var="_car" label="#{_car.name}" itemValue="#{_child}"/>
</h:selectOneListbox>

<a4j:commandLink reRender="someSelect" action"#{myAction.addCar}">
<a4j:commandLink reRender="someSelect" action"#{myAction.removeCar}">

[yasudevil]

Hi Francisco,

I tried that and I have the exact same behavior.

I was thinking if it was possible that on reRender time the selected object was not removed from the collection.

But, if that is the case for what reason when I add a object the field is updated correctly.

[yasudevil]

I've just realized that the combo isn't auto updated because I'm selecting one of the fields of my Select.

Is there any option that I can force the reRender? It may be a desired behavior in some cases but for this one it's really annoying.

[roanbrasil]

Francisco,

I am having a problem with a4j. I am getting 'A4J' is undefined.

[jamesjmp]

Roan, check that you have defined a4j in your page composition
For example:

<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:h="http://java.sun.com/jsf/html"
    xmlns:a4j="http://richfaces.org/a4j"
    xmlns:rich="http://richfaces.org/rich"
    template="layout/template.xhtml">

Maybe you have

    xmlns:a="http://richfaces.org/a4j"

instead of
  

 
    xmlns:a4j="http://richfaces.org/a4j"

[jamesjmp]

Diego, to force a rerender when you select one of your items try this:

<h:selectOneListbox id="someSelect">
     <s:selectItems value="#{user.cars}"
          var="_car" label="#{_car.name}" itemValue="#{_child}"/>
<a4j:support event="onchange"

reRender="someSelect" ajaxSingle="true" />
</h:selectOneListbox>

Good luck!