Updating due date on a parent & epic from its subtasks

[Giorgio Rivolta]

Hello there,

I am currently having my own structure of issues which looks like above:

|-Epic
|--- Level 1 (type of Task)
|------ Level 2 (type of subtask)

When the due date is changed in the Level 2 I need that the Parent (Level 1), update it's due date and consequently the Epic will update it's due date too.

I've already saw the thread "https://community.atlassian.com/t5/Jira-questions/Updating-start-and-due-date-on-a-parent-from-its-subtasks/qaq-p/1776092" but I think is something simpler in my case. I should group by the due date of the level 2 subtasks and update the Level 1 with the last due date that I have in the Level 2.

Then group by the due date of level 1 and update the Epic with the last due date that I found.

It's possible? Can you help me on how to do it?

I've read this:

• https://www.atlassian.com/software/jira/guides/expand-jira/automation
• https://www.atlassian.com/software/jira/automation-template-library#/
• https://community.atlassian.com/t5/Automation-articles/Jira-Automation-all-the-resources-you-need-in-one-page/ba-p/1388465

But I cannot undrstand how to perform the "lookup":

• action: lookup issues with JQL to find all Level 3 issues with the same parent as the trigger issue, ordered by the Start Date ascending

Can you give me the right JQL Syntax?

Best Regards,

Giorgio