Exception when s:optgroup list parameter is collection
------------------------------------------------------
Key: WW-2758
URL: https://issues.apache.org/struts/browse/WW-2758
Project: Struts 2
Issue Type: Bug
Affects Versions: 2.1.2
Reporter: Andreas Mähler
Hello S2 devs,
if I understand it right, the <s:optgroup> tag should behave like the normal
<s:select> tag, but I can't pass a collection as list parameter.
Here's an Example:
{code:title=SomeAction.java|borderStyle=solid}
public class SomeAction extends ActionSupport
{
public enum BasicType
{
ALL, TAG, OBJECT;
}
public List<BasicType> getBasicTypes()
{
return Arrays.asList( BasicType.values() );
}
}
{code}
{code:xml|title=someresult.jsp|borderStyle=solid}
<%-- snip --%>
<s:select name="type" size="1" list="basicTypes"> <%-- no problem here
--%>
<s:optgroup label="FooBar" list="basicTypes" /> <%-- boom! --%>
</s:select>
<%-- snip --%>
{code}
This is the output:
{code:html|borderStyle=solid}
<select name="type" size="1" id="type">
<option value="ALL">ALL</option>
<option value="TAG">TAG</option>
<option value="OBJECT">OBJECT</option>
<optgroup
label="FooBar"
>
<!-- FREEMARKER ERROR MESSAGE STARTS HERE --><script
language=javascript>//"></script><script
language=javascript>//'></script><script
language=javascript>//"></script><script
language=javascript>//'></script></title></xmp></script></noscript></style></object></head></pre></table></form></table></table></table></a></u></i></b><div
align=left style='background-color:#FFFF00; color:#FF0000; display:block;
border-top:double; padding:2pt; font-size:medium; font-family:Arial,sans-serif;
font-style: normal; font-variant: normal; font-weight: normal; text-decoration:
none; text-transform: none'><b style='font-size:medium'>FreeMarker template
error!</b><pre><xmp>
No signature of method findValue matches the arguments
The problematic instruction:
----------
==> assignment:
tmpKey=stack.findValue(optGroupInternalListUiBean.parameters.listKey) [on line
38, column 9 in template/simple/optgroup.ftl]
in include "/${parameters.templateDir}/simple/optgroup.ftl" [on line 88,
column 1 in template/simple/select.ftl]
----------
Java backtrace for programmers:
----------
freemarker.template.TemplateModelException: No signature of method findValue
matches the arguments
at
freemarker.ext.beans.MethodMap.getMemberAndArguments(MethodMap.java:94)
at
freemarker.ext.beans.OverloadedMethodModel.exec(OverloadedMethodModel.java:101)
. . . ...even more stacktrace here of course... .. .. .. . . .
{code}
Hope this really is a bug, but I think so, because everything is fine with
<s:select> and I could not find any restrictions in the reference docs.
Regards,
~Andreas
P.S: Why is the list attribute in <s:select> required? All my list elements can
be found in nested <s:optgroup> tags and feeding <s:select> with an empty list
is a little bit annoying.
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