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F: viewParam with converter and ViewScoped exception when calling second ajax request

I have this f:viewParamthat I am trying to relate validation and conversion userIdto Player, and I got unexpected results.

<f:metadata>
    <f:viewParam name="userId" value="#{myBean.selectedPlayer}" converter="pConverter"
         converterMessage="Bad Request. Unknown User" required="true"
         requiredMessage="Bad Request. Please use a link from within the system" />

</f:metadata>
<h:body>
    <p:messages id="msgs"/>        
    <h:form>
        <ul>
            <li><a href="index2.xhtml?userId=1">Harry</a></li>
            <li><a href="index2.xhtml?userId=2">Tom</a></li>
            <li><a href="index2.xhtml?userId=3">Peter</a></li>
        </ul>            
    </h:form>
    <h:form>
        <h:panelGrid columns="2" rendered="#{not empty myBean.selectedPlayer}">

            <h:outputText value="Id: #{myBean.selectedPlayer.id}"/>

            <h:outputText value="Name: #{myBean.selectedPlayer.name}"/>

        </h:panelGrid>
    </h:form>
    <h:form id="testForm">
        <h:inputText value="#{myBean.text}"/>
        <p:commandButton value="Switch" update=":msgs testForm"/>
        <h:outputText value="#{myBean.text}" rendered="#{not empty myBean.text}"/>
    </h:form>    
</h:body>

My converter looks like this

@FacesConverter(value="pConverter")
public class PConverter implements Converter {
private static final List<Player> playerList;
static{
    playerList = new ArrayList<Player>();        
    playerList.add(new Player(1, "Harry"));
    playerList.add(new Player(2, "Tom"));
    playerList.add(new Player(3, "Peter"));
}

@Override
public Object getAsObject(FacesContext fc, UIComponent uic, String value) {
    if(value == null || !value.matches("\\d+")){
        return null;
    }
    long id = Long.parseLong(value);
    for(Player p : playerList){
        if(p.getId() == id){
            return p;
        }
    }
    throw new ConverterException(new FacesMessage("Unknown userId: " + value));

}

@Override
public String getAsString(FacesContext fc, UIComponent uic, Object value) {
    if(!(value instanceof Player) || value == null){
        return null;
    }
    return String.valueOf(((Player)value).getId());
}
}

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+3
1

, <f:viewParam> HTTP-, . GET, . POST, . , null , required , , .

<f:viewParam required="true"> POST, <f:param> /.

<p:commandButton value="Switch" update=":msgs testForm">
    <f:param name="userId" value="#{param.userId}" />
</p:commandButton>

OmniFaces <o:viewParam>, beans, isRequired() getter ( ):

@Override
public boolean isRequired() {
    // The request parameter get lost on postbacks, however it already present in the view scoped bean.
    // So we can safely skip the required validation on postbacks.
    return !FacesContext.getCurrentInstance().isPostback() && super.isRequired();
}

, required (, , - ). ( reset ).

+5

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