Logo Questions Linux Laravel Mysql Ubuntu Git Menu
 

Is it possible to use EL conditional operator in action attribute?

The conditional operator works in many attributes like "rendered" "value" and others.

But it does not work in action? Or am I doing it wrong?

<h:commandLink action="#{true ? bean.methodTrue() : bean.methodFalse()}"/>

Error: javax.el.ELException: Not a Valid Method Expression

(I realized it using primefaces ajax action attribute)

like image 519
djmj Avatar asked May 06 '12 19:05

djmj


1 Answers

This is not supported. The action attribute is supposed to be a MethodExpression, but the conditional operator makes it a ValueExpression syntax. I don't think this will ever be supported for MethodExpressions in EL.

You have basically 2 options:

  1. Create a single action method which delegates the job.

    <h:commandButton ... action="#{bean.method}" />
    

    with

    public String method() {
        return condition ? methodTrue() : methodFalse();
    }
    

    If necessary, pass it in as method argument by #{bean.method(condition)}.

  2. Or, conditionally render 2 buttons.

    <h:commandButton ... action="#{bean.methodTrue}" rendered="#{bean.condition}" />
    <h:commandButton ... action="#{bean.methodFalse}" rendered="#{not bean.conditon}" />
    
like image 87
BalusC Avatar answered Oct 15 '22 16:10

BalusC