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POBinding process occurs before action is taken in JSF 2
 

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    <p>I'm using PrimeFaces with JSF 2.0, I have this layout:</p> <pre><code>&lt;h:panelGroup layout="block" id="panelGroup" binding="#{bean.boundPg}" /&gt; &lt;p:commandButton value="Update" action="#{bean.updateMe}" update="panelGroup" /&gt; </code></pre> <p>in which, the bean is <code>SessionBean</code>. By using log4j to debug I found out that the binding process called <code>getBoundPg</code> before executing the action <code>updateMe</code>. So the view is always out-of-date.</p> <p>Do you know why and how to reverse that order? Thanks!</p> <p>------------- Edit ---------------</p> <p>I'm making a web app for a quiz game.</p> <pre><code>&lt;h:panelGroup layout="block" id="pgContents" binding="#{bean.boundContents}" /&gt; &lt;p:commandButton value="Prev page" action="#{bean.prevPage}" update="pgContents" /&gt; &lt;p:commandButton value="Next page" action="#{bean.nextPage}" update="pgContents" /&gt; </code></pre> <p><code>pgContents</code> contains many <code>h:pannelGroup</code>s, each sub-group contains a label showing the content of a quiz, a <code>h:inputText</code> for the player to give their answer. Because of some reasons, I had to generate the children of <code>pgContents</code> programmatically.</p> <p>The <code>Prev page</code> and <code>Next page</code> buttons will retrieve the prev/next group of quiz</p> <p>Below is the bean (getters &amp; setters are skipped)</p> <pre><code>@ManagedBean(name = "bean") @SessionScoped public class LessonHelper { private int currentPage; private HtmlPanelGroup boundContents; public void prevPage() { // decrease currentPage // fetch contents // add children for boundContents (label, inputText) } // nextPage() is similar } </code></pre> <p>My problem is that, when I click the Prev/Next button, the getter <code>getBoundContents</code> is called first in binding process, and the <code>prevPage()/nextPage()</code> is called later, which cause the content always out-of-date.</p>
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