Question

i want to add the disabled attribute on the form:hidden tag dynamically when i go over a list of objects in my model. the code i have (that doesn’t work) goes a little something like this:

<c:forEach items="${myModel.myList}" var="obj">
        <div id="${obj.id}" onclick="selectObject(this);"><span>${obj.name}</span></div>
        <form:hidden path="myModel.selectedObj" />
</c:forEach>

i want the hidden input of obj in the list that his id is equal to the selectedObj to not be disabled, and every other hidden input i want to be disabled. This is what i tried:

<form:hidden path="myModel.selectedObj" <c:out value="${obj.id != myModel.selectedObj.id ? "disabled=\"disabled\"" : ""}"></c:out> />

as i said, this didn’t work out. any thoughts?

Answer 1

Try with this piece of code:

<c:forEach items="${myModel.myList}" var="obj">
    <div id="${obj.id}" onclick="selectObject(this);"><span>${obj.name}</span></div>
    <c:if test="${obj.id eq myModel.selectedObj.id}">
        <form:hidden path="myModel.selectedObj" />
    </c:if>
    <c:if test="${obj.id ne myModel.selectedObj.id}">
         <form:hidden path="myModel.selectedObj" disabled="disabled" />
    </c:if>
</c:forEach>

Or you can use a <c:choose /> , with <c:when /> and <c:otherwise /> tags:

<c:forEach items="${myModel.myList}" var="obj">
    <div id="${obj.id}" onclick="selectObject(this);"><span>${obj.name}</span></div>
    <c:choose>
        <c:when test="${obj.id eq myModel.selectedObj.id}">
            <form:hidden path="myModel.selectedObj" />
        </c:when>
        <c:otherwise>
            <form:hidden path="myModel.selectedObj" disabled="disabled" />
        </otherwise>
    </c:choose>
</c:foreach>