Rendered attribute on commandButton breaks action

[daxxy]

Here are 2 sets of buttons:

  <h:form>
    <rich:panel id="op1">

      <a4j:commandButton id="cb1" reRender="op1" rendered="#{editPageMode}"
          value="Set Edit Mode to False editPageMode: #{editPageMode}"

          actionListener="#{pageBean.setEditPageMode(false)}"  />

      <a4j:commandButton id="cb2" reRender="op1" rendered="#{not editPageMode}"
          value="Set Edit Mode to True editPageMode: #{editPageMode}"

          actionListener="#{pageBean.setEditPageMode(true)}"  />

    </rich:panel>
  </h:form>
  <h:form>
    <rich:panel id="op2">

      <a4j:commandButton id="cb3" reRender="op2"
          value="Set Edit Mode to False editPageMode: #{editPageMode}"

          actionListener="#{pageBean.setEditPageMode(false)}"  />

      <a4j:commandButton id="cb4" reRender="op2"
          value="Set Edit Mode to True editPageMode: #{editPageMode}"

          actionListener="#{pageBean.setEditPageMode(true)}"  />

    </rich:panel>
  </h:form>

pageBean:

@Name("pageBean")
public class PageBean {
   
    @In(required=false)
    @Out(required=false)
    Boolean editPageMode;
   
    public void setEditPageMode(Boolean editPageMode) {
        System.out.println("pageBean: setting edit mode " +  editPageMode);
        this.editPageMode = editPageMode;
    }

}

All of these buttons except one work as advertised.  That is to say when you click it, the setEditPageMode(mode) method fires.  The only one that does not work is "cb1".   For the life of me I cannot figure out why it doesn't work.  It is identical to its counterpart, cb3, the only difference being the rendered tag.  But the rendered tag has no effect on cb2.  The only difference between cb1 and cb2 is that one sets editPageMode to true and one sets it to false.

Can anyone see why this is not working?  This is driving me crazy.

Tanya

[nbelaevski]

Hi Tanya,

For JSF components "rendered" attribute is checked several times: it is processed either on rendering, as on postback processing. So, for your case it looks like "editPageMode" has request lifetime, and on the postback when "op1" link is clicked, its "rendered" expression is evaluated to false, thus link is not processed and action doesn't happen.

[daxxy]

Thanks for replying Nick.

The problem is not that the component is not rendering -- the component is rendering.  Therefore editPageMode must be evaluating to true. The problem is that the action is not firing when the component is rendered.

Can you duplicate this problem?

PS I tried expanding the scope of this context variable and the pageBean component to CONVERSATION and it did not help.

[nbelaevski]

Can you please try with session-scoped variable?

[daxxy]

Hey! That works!

Thanks, Nick.

[raja4web]

Hi,

I m newbie to richfaces. and i am facing the same problem.

I have two commandbuttons with same action, but rendered attribute has alternate values for both buttons. the buttons are rendered as they should. but the action is not called. When i remove the rendered attribute, the action is called then. So far i am unable to find any solution for that.

Please help

thanks in advance.

Raja

[ilya40umov]

To Mudassar,

Please, create a new discussion and provide a sample code.

[nbelaevski]

Raja,

http://community.jboss.org/wiki/CommonAjaxRequestsProblems#conditionalRendering

[raja4web]

Thanks, the problem was with scope of the object.