How to copy a subtask custom field value from the subtask to it's Parent (same custom field).

Question

I have seen many solutions for copying a Parent custom field value to a subtask custom field, but not the other way round.

Can someone help please?  Is it possible via ScriptRunner or something else, to copy the value of a subtask custom field after transitioning to Done, to the Parent custom field of the same field?  Would a post function script do it or another?  What would the script look like?

Background
The custom field value is first entered into the subtask after the work is done.  We need this value copied to the parent before 15 other subtasks are completed for the same Parent issue.

Please advise of a solution.  Thank You in Advance.

Tanwa Arewa · Answer

@Ravi Sagar _Sparxsys_ Thank You will try it.

Tanwa Arewa · Answer

Thank you for the prompt response. Will try now

Ravi Sagar _Sparxsys_ · Answer

Hi @Tanwa Arewa

Yes, ScriptRunner can definitely be used to do this. The examples you saw to copy from parent to subtask will not be a lot different for doing the reverse.

You can retrieve parent issue object using by something like this.

issue.getParentObject()

Where "issue" is an object.

To copy value from sub task to parent you can use a listener or may be a script post-function. You would use a script post-function if you need to perform some actions in specific order. Listener responds to event.

Ravi