Get customField Value from Epic to be inherited by New Issue type

[Jee Christiansen]

Using Script Runner...

Problem: 

I cannot get a customField value from an Epic to be inherited when I Create a new issue type that is linked to that Epic.

What I tried:

1. I tried using the Post Function "Set Field Value from Parent" but technically the EPIC is not the parent...and, no dice.
2. I then looked for a script to post using the "Conditional execution:" option in that same Post Function. I found a few script options to try, but I am running into issues with the variable values. The below script looks good, but any help will appreciated.

Values I know:

• The custom Field ID is the same on the EPIC and the New Issue
  • customFieldId=11200
• For Reference, the Custom Field Name is "Activity Type" or the above custom id (11200). This is one of my hangups because I am not sure how to define this. Do I call it "ActivityType", "11200", etc

Code I found on this board and tried to manipulate:

Tried being the operative word. 

import com.atlassian.jira.component.ComponentAccessor;
import com.atlassian.jira.issue.CustomFieldManager;
import com.atlassian.jira.issue.fields.CustomField;
import com.atlassian.jira.issue.Issue;

CustomFieldManager customFieldManager = ComponentAccessor.getCustomFieldManager();

if (issue.getIssueTypeObject().getName() == "Story" ) {
    CustomField epicLink = customFieldManager.getCustomFieldObjectByName('Epic Link');
    Issue epic = issue.getCustomFieldValue(epicLink);
    if(epic)
    {
        issue.setActivityType(epic.getActivityType());    
    }
}

Please help. Will be much appreciated! 

[Niranjanswamy Umeshaiah]

refer

https://community.atlassian.com/t5/Jira-questions/Inherit-fields-from-epic-to-epic-linked-user-story/qaq-p/634690

[Jee Christiansen]

Getting these errors with Script Runner:

avax.script.ScriptException: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Script10.groovy: 8: unable to resolve class CustomFieldManager 
 @ line 8, column 20.
   CustomFieldManager customFieldManager = ComponentAccessor.getCustomFieldManager();
                      ^

Script10.groovy: 11: unable to resolve class CustomField 
 @ line 11, column 17.
       CustomField epicLink = customFieldManager.getCustomFieldObjectByName('Epic Link');
                   ^

Script10.groovy: 12: unable to resolve class Issue 
 @ line 12, column 11.
       Issue epic = issue.getCustomFieldValue(epicLink);
             ^