{0}: Conversion error occurred (in SelectOneMenu)

Question

I have the following problem - I have a SelectOneMenu, first item is just an information to ask the user to select item from the drop item menu and after that are the real values. I have a Converter which work properly when i select and element from the drop down, but when the user does not select anything i jot this error {0}: Conversion error occurred.

Here is the logic for selectOneMenu:

<h:selectOneMenu value="#{requestBean.selectedEventType}"
        converter="tEventTypeConverter" 
        required="true" requiredMessage="Please, select item!">
        <f:selectItem itemLabel="Избери тип" itemvalue="#{null}"/>
        <f:selectItems value="#{eventTypeBean.selectItems}" var="eventType"
            itemLabel="#{eventType.eventTypeName}" itemValue="#{eventType}" />

    </h:selectOneMenu>

This is the part from the Converter class, where it fails:

public String getAsString(FacesContext context, UIComponent component,
            Object value) {
        if (value == null) {
                        return null; 
        }
...

It event did not show me the message "Please, select item!", when no element is selected. It treats the first one, as NULL and i don't know how to get rid of it. I appreciate any help.

It can work without any converter. – Vasil Lukach Apr 27 '14 at 19:28 — Vasil Lukach, Apr 27 '14 at 19:28
I did not manage to make it work without converter. – Tot Apr 28 '14 at 13:23 — Tot, Apr 28 '14 at 13:23

score -1 · Accepted Answer · answered Apr 28 '14 at 13:23

I made method getAsString to return "":

public String getAsString(FacesContext context, UIComponent component,
            Object value) {
        if (value == null) {
                        return ""; 
        }

and put logic in the Java class not to write in DB when the property is empty.

{0}: Conversion error occurred (in SelectOneMenu)

1 Answers1