How to refer element id dynamically - jsf

Question

I am trying to spread the radio buttons using tomahawk selectOneRadio. My id looks like this
<rich:dataTable id="carTable" value="#{cars}" var="car">
<rich:column>
<s:decorate id="types" template="/layout/display-text.xhtml">
<t:selectOneRadio id="models" value="#{car.model}" layout="spread">
<f:selectItems value="#{models}" />
</t:selectOneRadio>
<h:panelGrid columns="2">
<a:repeat value="#{models}" rowKeyVar="index">
<t:radio for="car:carTable:0:types:models" index="#{index}"></t:radio>
</a:repeat>
</h:panelGrid> -->
</s:decorate>
</rich:column>
</rich:dataTable>
I referred id after inspecting an element. But this is not working. Because for each iteration radio button id varies. How to refer an id in t:radio

Answer 1

The documentation for t:radio says:
The id of the referenced extended selectOneRadio component. This value is resolved to the particular component using the standard UIComponent.findComponent() searching algorithm.
I'm guessing a:repeat is a NamingContainer, so using "models" won't work. You can use the client identifier of the t:selectOneRadio component.
Something like this:
<t:selectOneRadio id="models" value="#{car.model}" layout="spread"
binding="#{requestScope.modelComponent}">
<f:selectItems value="#{models}" />
</t:selectOneRadio>
<h:panelGrid columns="2">
<a:repeat value="#{models}" rowKeyVar="index">
<t:radio for="#{requestScope.modelComponent.clientId}" index="#{index}" />
</a:repeat>
</h:panelGrid>
Caveats:
This binds the component to the request scope map using the key "modelComponent"; you need to ensure this doesn't collide with something else
Resolving modelComponent.clientId requires JSF 2.0 (JEE6) or above
See here for more details; working with older versions; etc.