Spring binding in jsp

[Pierre Javason]

Hey Guys
How's things

This is my first project in the spring framework.
I've checked and read many things but still can't seem to find a solution(which i'm sure exists) to the below problem.

So i'm creating an online exam. I have a Class Question that has question Components and the jsp - exam.jsp

Class:Question with appropriate getter and setter methods

private List<Component> components;

Class:Component

private boolean candidateBelieving;

exam.jsp

<c:forEach items="${question.components}" var="component" varStatus="loopstatus">
<br>
<spring:bind path="components[${loopstatus.index}].candidateBelieving">
<input type="radio" name="radio"  value="true" <c:if test="${status.value == true}">checked</c:if>/>

</spring:bind>
<c:out value="${component}"/>
</c:forEach>

My problem lies in the jsp code, in that It doesn't bind and set candidateBelieving to true but it used to and here's how.

Previously after reading http://mattfleming.com/node/134 I set name="<cut value='${status.expression}'/>" or something similar(similar because in trying to replicate it I was unable to do so.) The radiobuttons where grouped and data was binding to the command Object(Question) which was good. Until i added in <c:if test="${status.value == true}">checked</c:if> which was setup in case the user clicks the back button provided. At that point each radio button was being treated as a seperate one.

My question is how do i set the property in the spring bind tag if the radio button is ticked, have the radiobuttons as one group and have a radiobutton ticked if it was previously saved?

Is it possible to do this without the spring bind tag?

"Working with Checkboxes

<c:forEach items="${command.childArray}" var="child" varStatus="loopStatus">
     <spring:bind path="command.childArray[${loopStatus.index}].selected"> 
        <input type="hidden" name="_<c:out value="${status.expression}"/>">
        <input type="checkbox" name="<c:out value="${status.expression}"/>" value="true"
            <c:if test="${status.value}">checked</c:if>/>
     </spring:bind>
   </c:forEach>

This seems very similar but is still causing problems.

Please help

[rjuyal]

Your Code

<c:forEach items="${question.components}" var="component" varStatus="loopstatus">
<br>
<spring:bind path="components[${loopstatus.index}].candidateBelieving">
<input type="radio" name="radio"  value="true" <c:if test="${status.value == true}">checked</c:if>/>

</spring:bind>
<c:out value="${component}"/>
</c:forEach>

Take this
1. u have used name="radio" , you must be having this in your dataBind. if not then have this. Better change the name to some recognizable name e.g selectedComponent

2. value="true" what does this mean. You should not use "true" here should be some value. you can use counter

3. main thing <c:if test="${status.value eq question.selectedComponent}">checked</c:if>


Hope it get clear. :)