I have the following select one menu. And I have a converter for my "Foo" object.
<p:selectOneMenu id="sender" filter="true" filterMatchMode="contains" required="true" converter="fooConverter" disabled="#{myView.disabled}" value="#{myView.sender}" placeholder="Pick one or create new!" editable="true">
<f:selectItem noSelectionOption="true" itemLabel="Pick one:" itemValue="#{null}" itemDisabled="#{myView.sender ne null}" />
<f:selectItems value="#{dataFromDBean.foos}" var="foo" itemLabel="#{foo.name}" itemValue="#{foo}" />
</p:selectOneMenu>
@FacesConverter(value = "fooConverter")
public class FooConverter implements Converter {
@Override
public Object getAsObject(FacesContext ctx, UIComponent uiComponent, String id) {
ValueExpression vex = ctx.getApplication().getExpressionFactory().createValueExpression(ctx.getELContext(),
"#{dataFromDBean}", DataFromDBean.class);
DataFromDBean objects = (DataFromDBean) vex.getValue(ctx.getELContext());
Foo object = null;
try {
UUID guid = UUID.fromString(id);
object = objects.getFoo(guid);
} catch (IllegalArgumentException e) {
e.printStackTrace();
object = new Foo(id);
}
return object;
}
@Override
public String getAsString(FacesContext facesContext, UIComponent uiComponent, Object obj) {
if (obj == null)
return "";
if (obj.getClass().equals(String.class)) {
return (String) obj;
}
return ((Foo) obj).getId().toString();
}
}
And the constructor called in getAsObject
is:
public Foo(String name) {
super();
this.id = UUID.randomUUID();
this.name = name;
this.passive = false;
}
Basically my logic is that the selectOneMenu
uses the existing objects as values, which the user can select, and also add new value, which is a String, and if a String is passed, than no id will be found, so the string is passed as id instead, and then if an id can't be parsed into a UUID, then it is not a UUID string, so a new object is created, which will be saved by the server on submitting the form.
However, the problem is, that when editable="true"
is present, the selectOneMenu
always passes a String
to the converter, but not just any String
, but the itemLabel
value, which is the name representation of the Institution. Even the noselectoption is passed as it's itemLabel and never #{null}
. So regardless if the user enters a new value, or selects an existing one, always the itemLabel
attribute is passed to the converter, so my converter sees it as a new value and tries to create the new Institution. Is this a known bug in JSF
or PrimeFaces
?
As suggested by Usagi Miyamoto, <p:autoComplete>
is a workaround to my issue.
The following code works as I originally wanted it (in terms of functionality):
<p:autoComplete id="sender" value="#{myView.sender}" completeMethod="#{myView.completeFoo}"
var="foo" itemLabel="#{foo.name}" itemValue="#{foo}" converter="fooConverter" dropdown="true" disabled="#{myView.disabled}"/>
With the following complete method:
public Collection<Foo> completeFoo(String query) {
Collection<Foo> filteredFoo = new ArrayList<>();
for (Foo foo : foos) {
if (foo.getName().toLowerCase().contains(query.toLowerCase().trim())) {
filteredFoo.add(foo);
}
}
return filteredFoo;
}
It is RichFaces 3.x
, so JSF 1.x
, but something similar should work in JSF 2.x
with PrimeFaces
, too.
XHTML:
<a4j:region>
<h:inputText id="person" value="#{bean.item.id}">
<a4j:support event="onblur" action="#{bean.listener}" reRender="partner" />
</h:inputText>
<rich:suggestionbox id="partnerSuggest" for="partner" var="part" fetchValue="#{part.id}"
suggestionAction="#{bean.suggest}" reRender="partner">
<rich:column><h:outputText value="#{part.id}"/></rich:column>
<rich:column><h:outputText value="#{part.name}"/></rich:column>
<a4j:support event="onselect" action="#{bean.listener}" reRender="partner" />
</rich:suggestionBox>
</a4j:region>
Bean.java:
public class Bean
{
// Currently selected/edited Person
private Person item = new Person();
// Getters and Setters omitted...
// This method is invoked to present a list fro the <rich:suggestionbox> component.
// It receives the typed in text as parameter.
public List<Partner> suggest( Object value )
{
// Returns a list of partner filtered by the given value.
// In my case it could be a name or an ID...
}
// This method (an action) is called when the input field is lost focus (onblur event) or
// a selection is made from the suggestion list.
// It checks wheter the input field contains a valid ID, and sets the bean to the correct
// partner it loaded.
public String listener()
{
String value = this.item.getId();
final Partner who = Partner.find( value ); // To retrieve the partner
if ( null != who )
{
this.item = who;
}
return null;
}
}
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