How to change sub-task parentId using Groovy (Scriptrunner)

[Jonathan V.]

I am trying to change the parentId of a sub-task via a Groovy script in the Scriptrunner Console, but for some reason the change is not actually being saved.

Below, is the code I am using.

As you will see, I am getting the new parent from the change history of the sub-task, as it was moved by mistake. We have multiple cases like this, which is why I am trying to do this via a script.

Any help or guidance is appreciated.

import com.atlassian.jira.component.ComponentAccessor;
import com.atlassian.jira.issue.CustomFieldManager;
import com.atlassian.jira.issue.Issue;
import com.atlassian.jira.issue.MutableIssue;
import com.atlassian.jira.event.type.*
import com.atlassian.jira.issue.index.IssueIndexingService
import com.atlassian.jira.util.ImportUtils

def issueManager = ComponentAccessor.getIssueManager();
def changeHistoryManager = ComponentAccessor.changeHistoryManager
def issueIndexingService = ComponentAccessor.getComponent(IssueIndexingService)

final String issueKey = 'CLTAST-18782'
def user = ComponentAccessor.getJiraAuthenticationContext().getLoggedInUser()
def issue = ComponentAccessor.issueManager.getIssueByCurrentKey(issueKey)
def parent = ""

changeHistoryManager.getChangeItemsForField(issue, "Parent").each { def it -> parent = it.getFromString(); log.warn(it.getFromString()) }

if (issue.getParentObject().getKey() != parent){
log.warn ("Not the same parent")
def parentIssue = ComponentAccessor.issueManager.getIssueByCurrentKey(parent) 
def parentId = parentIssue.getId()
issue.setParentId(parentId)
issueManager.updateIssue(user, issue, EventDispatchOption.ISSUE_UPDATED, false);

boolean wasIndexing = ImportUtils.isIndexIssues();
ImportUtils.setIndexIssues(true);
log.warn("Reindex issue ${issue.key} ${issue.id}")
issueIndexingService.reIndex(issueManager.getIssueObject(issue.id));
ImportUtils.setIndexIssues(wasIndexing);
}

[Nic Brough -Adaptavist- · Accepted solution]

Sub-tasks are not linked to their containing issue by the parentID.  It's actually done with a hidden issue link type, but you don't need to worry about that directly.

Use SubTaskManager.changeParent(subtask, new parent, current user)

[Jonathan V.]

Thanks Nic, let me give that a try.

[Jonathan V.]

Can you share how to invoke it, and which package would need to be imported? I've actually never used this interface.

[Jonathan V.]

I found it on another thread, and was able to implement it and it worked perfectly.

Thanks again Nic.

[Nic Brough -Adaptavist-]

From memory:

import com.atlassian.jira.config.SubTaskManager

def subTaskManager = ComponentAccessor.SubTaskManager

 subTaskManager.changeParent(issue, parentIssue, user)

[Jonathan V.]

Thanks Nic, I forgot to reply earlier