Primefaces datatable required fields not work - primefaces

Question

I would create a check input information about specified in:
http://www.primefaces.org/showcase/ui/message/messages.xhtml
I create a dataTable with a lot required field (inputText with attribute required="true") and a p:message into datatable section.
Problem is when I click on button to save data: I don't see alert message in my page but starting execution of associated bean.
Why?
My code in .xhtml is this:
<h:form>
<p:messages id="messages" showDetail="true" autoUpdate="true" closable="true" />
<p:dataTable var="myAtt"
value="#{myBean.attributes}"
rowIndexVar="myAttIndex">
<h:inputHidden value="#{myAtt.value}" rendered="#{myAtt.description == 'XXX'}" />
<p:column rendered="#{myAtt.description == 'XXX'}">
<h:outputText value="*" rendered="#{myAtt.required}" />
</p:column>
<p:column rendered="#{ myAtt.description == 'YYY'">
<p:fragment rendered="#{myAtt.description == 'ZZZ'">
<p:fragment rendered="#{myAtt.value == 'value1'}">
<p:inputText size="#{myAtt.maxLength}"
value="#{myAtt.value}"
rendered="#{myAtt.const == 't1'}"
required="true"
id="idText">
<p:ajax process="#this" event="change" update="#form"/>
</p:inputText>
<p:message for="idText"/>
</p:fragment>
</p:fragment>
</p:column>
</p:dataTable>
<br />
<p:commandButton value="Create" action="#{myBean.commit()}" process="#this" update=":MYPAGE"/>
Thanks.

Answer 1

You forgot to indicate an id for the h:form : <h:form id="myForm">
And in the update of the p:commandButton you have to indicate the id of the form : update=":MYPAGE :myForm"
EDIT
According to the PrimeFaces users guide 3.5, the attribute action will be called when the user clicks on the button.