when epic link on a child ticket is changed it should automatically update the custom field to match

Question

epic link in child ticket is changed it should automatically update the custom field to match the new epic 
custom field = GSIRT project field

by using script runner listener

dileep_zwskr1 · Answer

} else if(issue.getCustomFieldValue(epicLink)==null) {    issue.setCustomFieldValue(GSIRTproject, null)    issueManager.updateIssue(loggedInUser, issue, EventDispatchOption.DO_NOT_DISPATCH,false)

dileep_zwskr1 · Answer

its set through the script only.

I am completely new to the scripting

Bill Sheboy · Answer

Hi @dileep

What have you tried thus far to solve this problem?  For example...

* How is the custom field currently set: manually, with an existing script, with automation rules, etc.?
* Have you reviewed the ScriptRunner documentation to learn how this might be done?

Kind regards,
Bill