ReRendered h:selectOneMenu Not Sending Value to BackingBean

[jasontc]

My goal is to using one selectOneMenu to drive a couple of other selectOneMenus. For example Tier1 will drive Tier2 and Tier2 will drive Tier3.

Take the following code:

<a4j:region selfRendered="true">

<h:selectOneMenu id="tier1" value="#{pc_DocumentEdit.selectedTier1}" required="false" styleClass="input-width-dropdown-reg">
 <f:selectItems value="#{pc_TiersAndLevels.tier1SelectItems}"/>
 <a4j:support event="onchange" action="#{pc_DocumentEdit.tier1Change}" reRender="tier2,tier3" ajaxSingle="true" immediate="false" />
</h:selectOneMenu>

<h:selectOneMenu id="tier2" value="#{pc_DocumentEdit.selectedTier2}" required="false" styleClass="input-width-dropdown-reg" disabled="#{empty pc_DocumentEdit.selectedTier1 ? true : false}">
 <f:selectItems value="#{pc_TiersAndLevels.tier2SelectItems}"/>
 <a4j:support event="onchange" action="#{pc_DocumentEdit.tier2Change}" ajaxSingle="true" immediate="false" />
</h:selectOneMenu>

<h:selectOneMenu id="tier3" value="#{pc_DocumentEdit.selectedTier3}" required="false" styleClass="input-width-dropdown-reg" disabled="#{empty pc_DocumentEdit.selectedTier2 ? true : false}">
 <f:selectItems value="#{pc_TiersAndLevels.tier3SelectItems}"/>
 <a4j:support event="onchange" action="#{pc_DocumentEdit.tier1Change}" ajaxSingle="true" immediate="false" />
</h:selectOneMenu>

</a4j:region>

The selection of tier1 works as expected, tier2 drop down is populated with the new values. When .tier2Change method is called on a tier2 change the value of selectedTier2 is null on the backing bean.

Any ideas? Is it not possible to send a value from a reRendered component?

[ilya_shaikovsky]

use AjaxSingle=false on the selects.

[jasontc]

ilya - thanks for the response. No luck with that approach though.

For whatever reason having the drop down disabled was causing the behavior. Even though the browser enabled the component a4j:support still assumed disabled (bug?).

disabled="#{empty pc_DocumentEdit.selectedTier1 ? true : false}"

Figured out how to get roughly the same affect:

styleClass="input-width-dropdown-reg #{empty pc_DocumentEdit.selectedTier1 ? 'hide' : 'filler'}"

Stylesheet

.hide
{
 display: none;
}

Thanks again for the help.

[ilya_shaikovsky]

Could you please reproduce it on

http://livedemo.exadel.com/a4j-dropDownBoxes/

and paste reproducage changes to make sure we have the same cases.

Thanks.

[ilya_shaikovsky]

sources for this project are at

http://webdownload.exadel.com/downloads/ajax4jsf/examples/a4j-dropDownBoxes/a4j-dropDownBoxes.zip

[asookazian]

"ilya_shaikovsky" wrote:
sources for this project are at

http://webdownload.exadel.com/downloads/ajax4jsf/examples/a4j-dropDownBoxes/a4j-dropDownBoxes.zip

This link is no longer being supported by JBoss/Richfaces. Is there another link to get this zip/code? this example/demo is a perfect example for our current project's needs.

I downloaded and extracted the src zip for richfaces-ui-3.1.0 and the samples folder has a project/example called 'dropdownmenu-sample' but it does not have the support tag in the jsp code.

thx.

[ilya_shaikovsky]

too old thread :) yes this examples was deprecated after ajax4jsf was merged with RF project.

I'm sure that you could succesfully create this case after "a4j:support" and "ajax attributes" sections in livedemo exploration :)

In future we will update the wiki with such examples.