Question

So I have trouble trying to use any of these two elements for different reasons. First I’ll describe what happens with the s:checkboxlist.

When the value on the sj:select changes I want to populate a list on my controller to use on my s:checkboxlist, do I have to use javascript? My initial guess was to call a javascript function on the sj:select onchange="" parameter, then on the javascript function refresh the s:checkboxlist so it populates using the new list.

For example if I have something like on my sj:select:

<s:url id="urlGetNewList"
    action="mycontroller!getNewList" />
<sj:select href="%{urlGetNewList}" id="myselect"
    onChangeTopics="reloadList"
    onCompleteTopics="reloadList"
    name="model.idType" list="types"
    listKey="idType" listValue="nameType"
    emptyOption="false" headerKey="-1"
    headerValue="select a value"
    formIds="frmMyForm" />

and on my s:checkboxlist I have :

<s:checkboxlist name="arrayOfIds" list="idsType"
                listKey="id" listValue="name"
                theme="vertical-checkbox" />

So my s:select gets populated from a list called types, when the value on the sj:select changes I call a function on my controller named getNewList, that will change the list that uses my checkboxlist, but how can refresh the checkboxlist.

You can notice I could solve this by using a sj:checkboxlist, I know it works, but if I do that then when I try to load the checkbox that are checked through the Integer array idsType, the checkboxes won’t get checked. For example if I have an Integer array like this:

idsType = { 2, 3 }

and I have a list arrayOfIds with 5 elements, then when I use the s:checkboxlist, 5 checkboxes will be shown and the second and third checkbox will be checked.

But if I do this using sj:checkboxlist, then only the first checkbox will be checked and also the checkboxes will change dinamically according to the sj:select value, which won’t happen when I use a s:checkboxlist.

I’m really lost as to how can I solve this issue, if anybody can help it will be very much appreciated.

Answer 1

To answer the first question, of course you’d need to use JavaScript to update the checkbox list–the standard <s:checkboxlist> is completely unaware of Ajax. You would need to do it manually by binding to the topic published by the sj:select.

The plugin wiki (assuming this is the plugin you’re using, there are actually a few) has a page discussing how to handle JSON results in a topic.

The <sj:checkboxlist> can reload by listening to topics; there should be no issue handling multiple items in the list; you may need to provide additional details regarding what you tried, and what went wrong (if anything, for example, check the JavaScript console).