Primefaces update component after

Question

I have a selectOneMenu that changes a value in the backing bean and based on that value, another component is being displayed or not. What I would like is to update that certain component after the value in the backing bean is changed by the selectOneMenu

<h:selectOneMenu value="#{backingBean.id.value}" >
            <f:selectItem itemLabel="Choose" itemValue="0"/>
            <f:selectItems value="#{backingBean.idList}"
                var="id" itemLabel="#{id.name}" itemValue="#{id.value}" />
             <p:ajax listener="#{backingBean.changeId}" process="@this" update="userMenu"/>
</h:selectOneMenu>
<p:menu id="userMenu" rendered="#{backingBean.id.value != 0}">
</p:menu>

The value changes in the backing bean but the is not updated.

Please check if you created the id object in your backing bean, in the declaration or in the postconstruct method. In the declaration would look like ´private Property id = new Property();´. — Javier Haro, Sep 09 '15 at 19:43

Geinmachi · Answer 1 · 2015-09-09T19:01:54.870

This should work

<h:selectOneMenu value="#{backingBean.id.value}" >
        <f:selectItem itemLabel="Choose" itemValue="0"/>
        <f:selectItems value="#{backingBean.idList}"
            var="id" itemLabel="#{id.name}" itemValue="#{id.value}" />
         <p:ajax listener="#{backingBean.changeId}" process="@this" update="userMenuWrapper"/>
</h:selectOneMenu>
<p:outputPanel id="userMenuWrapper">
    <p:menu id="userMenu" rendered="#{backingBean.id.value != 0}"/>
</p:outputPanel>

Primefaces update component after

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