Facelets, Template - does not reference a MethodExpression

[jamesclinton]

I am getting an exception with my Facelet tag which has a variable for a commandLink action property named event. If the variable is replaced with a hardcoded string its works (but isnt very useful).

I am using Facelets/JSF for the view obviously.

<h:commandLink action="${event}" ...>

javax.faces.el.EvaluationException: /WEB-INF/facelets/tags/myfaces/column-command-link.xhtml @12,75 action="${event}": Identity 'event' does not reference a MethodExpression instance, returned type: java.lang.String
	com.sun.facelets.el.LegacyMethodBinding.invoke(LegacyMethodBinding.java:73)
	org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:61)
	javax.faces.component.UICommand.broadcast(UICommand.java:109)
	javax.faces.component.UIData.broadcast(UIData.java:517)

Anyone come across this problem?

[jeremyg484]

Are you trying to extract the value of 'event' from a page property?

I would not expect this to work. The action property needs to either be a hardcoded string, or it needs to be a method expression that resolves to a no-arg method that returns a String.

-Jeremy

[jamesclinton]

Are you trying to extract the value of 'event' from a page property?

I would not expect this to work. The action property needs to either be a hardcoded string, or it needs to be a method expression that resolves to a no-arg method that returns a String.

-Jeremy

Hi Jeremy

Yes, the transition event id its being passed into the template.

Tag

<xxx:columnCommandLink title="#{messages['label.name']}" ... event="#{backingBean.select}">
  ...
</xxx:columnCommandLink>

Template

<h:commandLink ... action="${event}" ...>
 ..
</h:commandLink>

If I hardcode the action in the template as a string or method expression it works...its there no way to pass this value as a variable...this currently only seems to not work on the 'action' property of commandLink.

Regards.

[jamesclinton]

Resolved.

Format of action must be: action="#{<backingBean>[<event>]}"

For value bindings you can use this format #{<backingBean>.<event>}

[figura]

I couldn´t manage to get this working...

My template source:

	<rich:toolBarGroup>
		<a4j:commandLink action="#{action}" styleClass="toolbar-button">
			<h:graphicImage id="#{id}" value="#{image}" title="#{label}" style="vertical-align: middle;"/>
			<h:outputLabel for="#{id}" value="#{label}" style="vertical-align: middle;" />
		</a4j:commandLink>
	</rich:toolBarGroup>

My page source:

<sdtt:toolbarButton id="new" label="Nova Sir" image="/images/newitem.gif" action="newSir" />

And I get the following error: "Identity 'action' does not reference a MethodExpression instance, returned type: java.lang.String".

Any hints?

[figura]

I solved my problem using the ActionMapperTagHandler solution from the richfaces photoalbum example app.

It´s simple, but it took me a lot of googling to find:

http://docs.jboss.org/richfaces/late...ml/Button.html