Create sub-task with a summary based on a custom field

[Becky Simpkins]

Hi!  I am using Scriptrunner to create a sub-task via a workflow postfunction.  My goal is to end up with a sub-task that's summary field is a combination of the parent's summary and the contents of a custom field.  For example, the sub-task's summary field would look like this:

[Parent's summary field] - [Contents of a select list custom field]

Anyone know how to put that in groovy?  

Thanks for your help!

[Max Lim _ScriptRunner_]

Navigate > Add post function > Script Post-Function [ScriptRunner] > Create a sub-task

Fill in appropriate configurations, and under _Additional issue actions_:

import com.atlassian.jira.component.ComponentAccessor

def customField = ComponentAccessor.getCustomFieldManager().getCustomFieldObjectsByName("Just text").first()
def parentIssue = issue.getParentObject()

issue.setSummary(parentIssue.getSummary() + "-" + parentIssue.getCustomFieldValue(customField))

 Hope this helps.

[Becky Simpkins]

Thanks for the reply!  I tried the above but received the following error:

2021-02-01 13:57:07,159 ERROR [workflow.AbstractScriptWorkflowFunction]: Workflow script has failed on issue NAM-3960 for user 'becky'. 
java.util.NoSuchElementException: Cannot access first() element from an empty List
 at Script78.run(Script78.groovy:8)

Any idea what the problem might be?  Ok if not.  My team ended up deciding not to carry the Summary field from the parent over to the child.  So asking this question in the hopes of helping someone else in the future.  :)

[Max Lim _ScriptRunner_]

The error occurs because you did not have a "Just text" custom field in your parent issue.

You need to replace "Just text" with the name of your intended select list custom field name.