How can I update a custom numerical field from sub-tasks to parent

Question

I'm using Jira cloud, Next gen.

I would like to create automation rule for updating a parent custom field from sum of sub-tasks custom field.

To be more specific - 
I created a numeric custom field for "Story points estimate" that is used in all issue types.

I would like to reflect the sum of all the sub-tasks story points in the parent issue.

How can I do that?

Nitzan Soreq_xct18v · Answer

Thank you! seems to be working!

Andreas Knecht · Answer

Hi @Nitzan Soreq ,

Please see https://community.atlassian.com/t5/Marketplace-Apps-Integrations/How-can-you-automatically-sum-the-story-points-of-all-subtasks/qaq-p/863364 for an answer to this question.

Cheers,
Andreas