使用Primefaces更新JSF组件

Question

I know this has been asked many times, but mainly with ajax. I can't use ajax in my project.

I want to create an event on selectOneMenu A and update selectOneMenu B.

<p:selectOneMenu id="A" binding="#{bean.slmA}" >
    <f:selectItems value="#{bean.itemsA}"/>
</p:selectOneMenu>

<p:selectOneMenu id="B" binding="#{bean.slmB}">
    <f:selectItems value="#{bean.itemsB}"/>
</p:selectOneMenu>

I already used the valueChangeListener with a method that adds elements to itemsB (also onchange ="submit()") but slmB doesn't update.

Should it be updated after adding elements to itemsB list?

Answer 1

Without ajax I guess one option would be to use a hidden commandButton to do a full request (I'd guess there are other options too):

<h:form id="form">
    <p:selectOneMenu id="A" value="#{bean.slmA}" onchange="$('#form\\:cb').click()">
        <f:selectItems value="#{bean.itemsA}"/>
    </p:selectOneMenu>

    <p:selectOneMenu id="B" value="#{bean.slmB}">
        <f:selectItems value="#{bean.itemsB}"/>
    </p:selectOneMenu>

    <p:commandButton id="cb" ajax="false" style="display: none" value="button" action="#{bean.functionThatFillInformationOfListB()}" />
</h:form>

Bean must be at least @ViewScoped and functionThatFillInformationOfListB() return either void or null. Note I changed binding to value in the selectOneMenu 's, but if you are in fact creating the selectOneMenu 's on the bean just disregard that (I think it will still work).