valueChangeListener of rich:comboBox getting called on submit which is unintended

Question

I'm facing a issue where on changing rich:comboBox value, i need to call backing bean. So i'm using valueChangeListener with a4j:support event="onchange" as bellow:

<rich:comboBox value="#{myBean.name}" defaultLabel="#{messages['dropdown.defaultText']}" label="#{messages['label.name']}" status="defaultStatus" valueChangeListener="#{myBean.checkToChangeName}" disabled="#{myBean.isAdminUser}" >
    <f:selectItems value="#{myBean.nameList}" />
    <a4j:support event="onchange" reRender="errTable,popUpPanel" oncomplete="if(#{myBean.showPopup}) #{rich:component('popUpPanel')}.show();" />
</rich:comboBox>

The backing bean method:

public boolean checkToChangeName(ValueChangeEvent event){
    // Code to check change is valid & its impact on other fields
}

The method checkToChangeName() should get call only on change event. But in my case, the methods is getting called on change event & also getting called on submit of the form which i don't need & creating trouble.

I'm using h:commandButton as bellow to submit the form:

<h:commandButton id="btnSave" value="#{messages['action.save']}" action="#{myBean.updateProfile}" reRender="profileForm" />

Can anyone help me to understand why its calling checkToChangeName() method on submit? & How can i prevent it?

Answer 1

I got the issue. The whole form was getting re-render on save which was causing call to valueChangeEventListener. To avoid this, I just changed below reRender attibute for save commandButton:

Old:

<h:commandButton id="btnSave" value="#{messages['action.save']}"
                 action="#{myBean.updateProfile}" reRender="profileForm" />

New:

<h:commandButton id="btnSave" value="#{messages['action.save']}"
                 action="#{myBean.updateProfile}" reRender="errorMessageTable" />

Now the problem is resolved.