I am having a problem with a map-backed form and html:select with multiple="true".
Would appreciate any help/ideas.
I need to display a set of "html:select" lists. The number of lists is user-defined
(based on database data) and each select list
must allow more than one choice to be selected.
I settled on using a map property in the form bean as the manual suggests. Everything
works great on initial display, furthermore I
am selecting all values which will be the normal use case for the user.
However, upon return, only a single value is passed in. Should I be using the "value"
attribute on the html:select tag? I cannot
seem to figure out how to make it work as an array.
Here are the relevant struts/JSTL tags.
<c:forEach items="${form1.choiceList}" var="valueArray">
<td style="text-align: center;">
<c:set var="cList" value="${Collection_charChoices[choiceArray.key]}"/>
<html-el:select name="form1" property="choiceLists(${choiceArray.key})" size="6"
multiple="true"
value="choiceLists($choiceArray.key)">
<html-el:options collection="cList" property="id" labelProperty="name"/>
</html-el:select>
</td>
</c:forEach>
Here is a code snipped I use to inspect the map as it comes in (afer having been
successfully sent out and displayed with all values
selected):
Set keySet = map.keySet();
Iterator ik = keySet.iterator();
while (ik.hasNext()) {
Object key = (String)ik.next();
log.debug("showMap - mapKey='"+key.toString()+"'");
Object value = map.get(key);
if ( value instanceof String[] ) {
String[] valArray = (String[]) value;
for (int i=0;i<valArray.length;i++)
log.debug("showMap - valArray["+i+"]='"+valArray[i]+"'");
} else {
log.debug("showMap - value instanceof
'"+value.getClass().getName()+"'");
log.debug("showMap - value='"+value.toString()+"'");
}
}
It shows a simple String object (the first choice in the options list, actually)
rather than the String[] that was sent out.
Thank you again - Richard
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