JSF Facelets ui:repeat tag breaks redisplaying of values in a form when validation failed

Submitted by Jochus on Thu, 20/09/2012 - 20:52 | Posted in: Java

I'm currently working on a project which uses the Mojarra 2.0.3 JSF reference implementation. I encounterd a really strange bug today ...
Imagine you have the following form (code entered in pseudocode, just to make it compact and clear):

        <h:inputText id="field1" value="#{Bean.singleField.value}" required="true"/>
         <ui:repeat value="#{Bean.listOfFields}" var="field">
             <h:inputText value="#{field.value}"/>
    <h:commandButton value="Submit" type="submit" action="#{Bean.doAction} />

Now, when you don't provide a value in field1 (you do provide values in the other fields) and you submit the form, validation will fail (because of the required attribute).

The problem:
When the form rerenders, all values in the input fields inside the ui:repeat tag are gone.

The solution
After some research, we found out we stumbled into the following bug: http://java.net/jira/browse/JAVASERVERFACES-1807. So we should upgrade our JSF implementation (which isn't an option for the moment). Luckily, we are using Richfaces in our project so we could replace the ui:repeat tag by the A4J equivalent: aj4:repeat.

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