Populate/Display the user's name

[ElvinSalim]

When a user has checked the "Follow" checkbox, then displays the user's name in the "Follow by" field. The BR script is not working, do I need other script/logic or just modify it?

(function executeRule(current, previous) {
if (current.u_follow == true) {
var user = gs.getUser(); 
current.u_follow_by = gs.getUserDisplayName();
}
})(current, previous);

[Harish KM · Accepted solution]

you could just do this

current.u_followed_by = gs.getUser().getDisplayName();

[Ashutosh C J]

I see what's happening here
Every time the form is updating, the BR is executing.
You Should make the BR to work on Insert and not on Update. This will solve your issue

There is a suggestion for the script :- 
Please change line 4, 5 like this :-
var user = gs.getUserID();

current.u_follow_by = user;

[ElvinSalim]

@Ashutosh C J 

It displays only System Administrator on Insert in BR, so I keep on Update in BR. I added this logic: if user not equal to sysadmin then update it with current user in if statement and it seems to work.

[Ashutosh C J]

Please move the if condition in "When to Run" section of BR and let it run for Update. For reference, please check the attached screenshot. Then just copy paste this code in script.

(function executeRule(current, previous) {

        var user = gs.getUserID();

        current.u_follow_by = user;

})(current, previous);