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https://issues.apache.org/jira/browse/WW-2758?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lukasz Lenart closed WW-2758.
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Fix Version/s: (was: 6.1.0)
Resolution: Not A Problem
> Exception when s:optgroup list parameter is collection
> ------------------------------------------------------
>
> Key: WW-2758
> URL: https://issues.apache.org/jira/browse/WW-2758
> Project: Struts 2
> Issue Type: Bug
> Affects Versions: 2.1.2
> Reporter: Dieter Melnizky
> Priority: Major
>
> 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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