Primefaces DataTable, lazy loading and CommandButton per row

Question

i have this simple page:

<h:form id="form">

    <p:dataTable value="#{testBean.unitTypeModel}" var="elem" lazy="true" rows="10">
        <p:column headerText="class">#{elem.class.simpleName}</p:column>
        <p:column headerText="code">#{elem.code}</p:column>
        <p:column headerText="description">#{elem.description}</p:column>
        <p:column headerText="action">
            <p:commandButton action="test2" icon="ui-icon ui-icon-wrench" value="edit">
                <f:setPropertyActionListener target="#{testBean.selection}" value="#{elem}"/>
            </p:commandButton>
        </p:column>
    </p:dataTable>

    <p:commandButton action="test2" icon="ui-icon ui-icon-wrench"/>

</h:form>

and the CommandButton inside DataTable is not working, just refreshes page. but the one outside is working.

if i change value and lazy this way:

<h:form id="form">

    <p:dataTable value="#{testBean.unitTypeModel.load(0, 10, null, null, null)}" var="elem" lazy="false" rows="10">
        <p:column headerText="class">#{elem.class.simpleName}</p:column>
        <p:column headerText="code">#{elem.code}</p:column>
        <p:column headerText="description">#{elem.description}</p:column>
        <p:column headerText="action">
            <p:commandButton action="test2" icon="ui-icon ui-icon-wrench" value="edit">
                <f:setPropertyActionListener target="#{testBean.selection}" value="#{elem}"/>
            </p:commandButton>
        </p:column>
    </p:dataTable>

    <p:commandButton action="test2" icon="ui-icon ui-icon-wrench"/>

</h:form>

the CommanButton inside DataTable works like a charm.

someone knows why?

is it a bug?

i'm on

• Glassfish 3.1.2
• JSF 2.1.11 (Mojarra)
• PrimeFaces 3.4-SNAPSHOT

Answer 1

found out that the lazy datamodel must be the same instance on postback request, even a new instance with the very same values will not work. so it must be provided from at least a @ViewScoped bean.