ScriptRunner update custom field's value between linked issues, using Parent Link field

[Judah]

I am trying to match a custom field's value from a "Project" issue type into a "Feature" issue type, on update. These issue types are linked via the Parent Link field. 

ie. My custom field is called "Issue Category." If I update that field on the Project issue, I would like all linked Feature issues to automatically update, to match. 

Below is what I have so far...a mix of real code w/ psuedo-code  

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.event.type.EventDispatchOption
import com.atlassian.jira.issue.MutableIssue
import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.issue.Issue
import com.atlassian.jira.issue.ModifiedValue
import com.atlassian.jira.issue.util.DefaultIssueChangeHolder
import com.atlassian.jira.issue.comments.CommentManager
import com.atlassian.jira.user.ApplicationUser
import com.atlassian.jira.issue.link.IssueLink


Issue issue = event.issue

def change = event?.getChangeLog()?.getRelated("ChildChangeItem")?.find {it.field == "Issue Category"} // this should grab changes between linked issues, not child issues?

def customFieldManager = ComponentAccessor.getCustomFieldManager()
 def field = customFieldManager.getCustomFieldObjects(event.issue).find { it.name == "Issue Category" }
 def parentLink = customFieldManager.getCustomFieldObjectByName('Parent Link') // getting the Parent Link custom field
 def featureValue = issue.getCustomFieldValue(field)
 def issueManager = ComponentAccessor.getIssueManager();
 def customFieldValue = issue.getCustomFieldValue(parentLink) // Parent Link field value
 def parentKey = (String) customFieldValue
 def parentIssue = issueManager.getIssueObject(parentKey) // Parent issue object
 def parentValue = parentIssue.getCustomFieldValue(field)


// HERE IS WHERE I NEED HELP!!
if (parentValue == changed) then featureValue = parentValue

[Judah]

Sorry Judeboy, looks like no can help you out....shout out my adaptivist peeps!