Update source on communication plan table

[Nisha Mishra23]

I want to  source to auto populate with change request number when we create communication plan from communication task 

[Ankur Bawiskar]

@Nisha Mishra23 

how is CHG related to Communication Plan and Communication Task?

share some more screenshots and details

[Nisha Mishra23]

Once we click on new under communication task then we get 

After that we have to click on communication plan create new communication plan then we get  below form and we need change request autopopulatethere.

[Ankur Bawiskar]

@Nisha Mishra23 

parent field on form already has CHG, you can use display BR on communication task table and set the Source field

[Nisha Mishra23]

I am using below code but still not getting the change number
(function executeRule(current, previous /*null when insert*/) {

    if (!current.comm_task.nil()) {

        var commTaskGR = new GlideRecord('comm_task');

        if (commTaskGR.get(current.comm_task)) {

            if (!commTaskGR.parent.nil()) {

                var changeGR = new GlideRecord('change_request');

                if (changeGR.get(commTaskGR.parent)) {

                    current.comm_plan.source = changeGR.number;

                }

            }

        }

    }

})(current, previous);