GROOVY_CHILDS_Parent Link

[Mateusz Janus]

Hello Jira Ninjas! I need help

1. I have Jira Data Center with Advence Roadmap Plan

2. My Ticket Type hierarchy looks like below
a. GROUP

b. Initiative

c. EPIC

d. Story/Task/BUG

3. when i create child/parent relation between EPIC and story i use EPIC LINK FIELD

4. when i create child/parent relation between GROUP and INITATIVIE and EPIC i use PARENT LINK FIELD

5. I dont have childOf() funtion available in JQL but i have valid SCRIPT RUNNER

6. I am not groovy expert... but i already know there is a way to create such funtion

Can you help me run the groovy script which returns all CHILDS of GROUP ticket or at least ALL initatives childs of parent GROUP?

I am expecting results i.e. issueKey= ABC and script (or function) will return all CHILDS (INITIATIVE, EPICS, and STORIES) or at least only 1st level childs i.e. INITAITIVES.

THANK U!!!! in advance

[Mateusz Janus]

import com.atlassian.jira.issue.Issue
import com.atlassian.jira.issue.IssueManager
import com.atlassian.jira.issue.link.IssueLinkManager
import com.atlassian.jira.issue.fields.CustomField
import com.atlassian.jira.issue.fields.layout.field.FieldManager

// Pobierz IssueManager i CustomFieldManager
def issueManager = com.atlassian.jira.issue.IssueManager
def customFieldManager = com.atlassian.jira.issue.fields.layout.field.FieldManager

// Klucz problemu nadrzędnego
def parentIssueKey = "ENGI-629" // ticket sample key
def parentIssue = issueManager.getIssueObject(parentIssueKey)
assert parentIssue != null : "no issue find ${parentIssueKey}!"

// Pole Parent Link (customfield_10101)
def parentField = customFieldManager.getCustomFieldObject("customfield_10101")

// search issues for Parent Link 
def allIssues = issueManager.getIssueObjects()

def initiatives = allIssues.findAll { issue ->
    if (issue.issueType.name != "Initiative") return false
    def parentVal = issue.getCustomFieldValue(parentField)
    if (parentVal != null) {
        def parentK = parentVal instanceof Issue ? parentVal.key : issueManager.getIssueObject(parentVal.toString())?.key
        return parentK != null && parentK == parentIssue.key
    }
    return false
}

// return key

 This is what i achieved after 1 week of simulations but still get ERROR withut detailed LOG.