Problem with changing required property based on another field using EL

Question

Hi,
In my form, I want to set required property should be true or false for field 'B' based on value of field 'A'.
Value of 'A' is from 1 to 10 as choice list.
If 'A' value is 1 then i want i want to set required property of 'B' is false.otherwise the field 'B' should be required.
I set auto Submit to true for field 'A' and 'A' assigned as partial trigger for 'B'.
In required property of 'B', i given
#{bindings.ScheduleLevel.inputValue!=1}
Now, it is working fine if i try to change the list value of 'A' from 2 to 1 or 1 to 2 or more in the existing record.
But, if i click create button, then if i choose 1 for 'A', then the 'B' field is not changing from required to non-required.
my jdev version is 11g.
Any suggestions please.
Thanks in advance,
SAN

Answer 1

This would not work as validations would fire before. So you will have to accomplish this using a valuechangelistener like this.
Keep a boolean variable which captures whether field is required or not let' say brequired
for field A
set immediate=true, autosubmit=true
then in value change listener of A you use the code as follows:-
public void onAChange(ValueChangeEvent valueChangeEvent) {
        Object value=valueChangeEvent.getNewValue();
        if(value!=null&&!value.toString().trim().equalsIgnoreCase("")){
            setBrequired(true);
            FacesContext.getCurrentInstance().renderResponse();
        else{
            setBRequired(false);
            FacesContext.getCurrentInstance().renderResponse();
            }