JQL or Automation to "Find the Other Children of the Parent"

[Patrick Chen]

Hello, we are trying out Jira Software Cloud with the basic Automation tool.

This is the desired scenario and Automation:

Story ABC-1 with Subtasks ABC-2, ABC-3, ABC-4.
ABC-1 has a parent link issue relationship with ABC-2, ABC-3, ABC-4. 
Subtasks ABC-2, ABC-3, ABC-4 do not have any direct link issue relationship with each other.

When a field, ie. text field "Assigned Team", on Subtask ABC-2 is updated, I want to run an Automation that updates ABC-3 and ABC-4 to the same value for "Assigned Team".

However, I am having trouble thinking of a way to "find the other children of the parent" in a JQL or pre-baked Automation filter.

Any suggestions or guidance is appreciated. Thank you!

[Mark Chaimungkalanont]

You should be able to use the related issues / issue branches feature with a JQL. The JQL search could then find the "siblings" tickets and the edit the assignee for these

e.g.  a JQL with:

parent = {{issue.parent.key}}

You'll probably need to add more conditions here (check that it's a subtask etc) but ho[efully should be enough to get you going!