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https://issues.jboss.org/browse/JBSEAM-4654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12718800#comment-12718800
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Tiago Peruzzo commented on JBSEAM-4654:
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Marek, this error also occurs in version 2.3.0.CR1 maybe not for the same
reasons, try adding a convert select the problem will happen.
<h:selectOneMenu value="#{myComponent.value}">
<f:converter converterId="myConverter" />
<s:selectItems value="#{myComponent.itens}" var="item"
label="#{item.label}" noSelectionLabel=""/>
</h:selectOneMenu>
I noticed that this occurs because changes were made in classes and
com.sun.faces.renderkit.html_basic.MenuRenderer and
com.sun.faces.renderkit.RenderKitUtils starting the JSF2 ... 's kinda hard to
explain why more and debugging methods renderSelect RenderOptions can help.
I made a patch putting the logic of creation of the ConverterChain at the
beginning in encodeEnd method.
> s:selectItems noSelectionLabel does not generate option value
> -------------------------------------------------------------
>
> Key: JBSEAM-4654
> URL: https://issues.jboss.org/browse/JBSEAM-4654
> Project: Seam 2
> Issue Type: Bug
> Components: JSF Controls
> Affects Versions: 2.2.1.CR1
> Environment: JBoss 6 M3
> Reporter: Andrew Wheeler
> Assignee: Marek Novotny
> Labels: jsf
> Fix For: 2.3.0.CR1
>
> Original Estimate: 2 hours
> Remaining Estimate: 2 hours
>
> When a selectOneMenu has no items other than the no selection option it does
> not render the option value as
> org.jboss.seam.ui.NoSelectionConverter.noSelectionValue. In this case the
> there are no values in person.images.
> <h:selectOneMenu id="portrait" value="#{person.portrait}">
> <s:selectItems value="#{person.images}" var="i" label="#{i.annotation}"
> hideNoSelectionLabel="false" noSelectionLabel="Select a portrait..."/>
> <s:convertEntity/>
> </h:selectOneMenu>
> This renders:
> <select id="person:portraitDecoration:portrait"
> name="person:portraitDecoration:portrait" size="1"> <option
> selected="selected">Select a portrait...</option>
> </select>
> The result is that any form submit causes a java.lang.NumberFormatException
> with message: "For input string: "Select a portrait...""
> I have debugged a little and I can see that the converter is not firing when
> rendering the page. It does however fire for other selectOneMenu items on the
> page that have one or more items.
> A similar and perhaps related issue is referenced in the JBoss Forum.
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