Question

Here is code:

<ui:repeat var="entity" varStatus="status" value="#{myentityListView.someList}">

                <h:form>
                <h:commandLink  value="Go!" action="mypage.xhtml" >
                <c:if test="#{entity.entityType=='Comment'}"><f:param  name="productId" value="#{entity.product.getId()}"/></c:if>
                <f:param  name="userId" value="#{entity.user.getId()}"/>
                </h:commandLink>
                 </h:form>

                </ui:repeat>

Maybe its cause is that h:commandLink is in ui:repeat.

mypage.xhtml is an exixting page.

Thanks

Answer 1

You need to make sure that #{myentityListView.someList} returns exactly the same value during the form submit request as it was during the request of displaying the page. Putting the bean in the view scope (just mark it @ViewScoped) and ensuring that you preserve the list during (post)constructor or in an action method should fix it.

See also:

• commandButton/commandLink/ajax action/listener method not invoked or input value not updated

However, in your particular case, it’s much better to just use <h:link> instead as you don’t seem to need to send a POST request at all. This way you end up with nice bookmarkable and searchbot-chipherable links.

<ui:repeat var="entity" varStatus="status" value="#{myentityListView.someList}">
    <h:form>
        <h:link value="Go!" outcome="mypage.xhtml">
            <f:param name="userId" value="#{entity.user.id}" />
            <f:param name="productId" value="#{entity.product.id}" disable="#{entity.entityType != 'Comment'}" />
        </h:link>
    </h:form>
</ui:repeat>

Also note that I fixed your <c:if> approach by removing it as it won’t work as you’d expect. It would always evaluate false. See also JSTL in JSF2 Facelets… makes sense?

See also:

• When should I use h:outputLink instead of h:commandLink?