Why my Kanban board show subtasks of issues not in scope/filter?

[Pablo Osorio da Silva]

Background

As an Agile Coach, I want to see separate issues on separate board, so that each team can focus on their scope. AC: Not pay additional plug-ins

Details:
I have different teams, with different Kanban boards, and 1 Scrum board on the same project. There are stories and sub-tasks, and goal would be that each one would see only their own issues (board and backlog). There is a custom field "SW Team" which is filled during plannings and backlog refinements with one of the team names, and until now I came out with 2 approaches to filter this:

1. JQL: project = sw AND "sw team" = ABC...
   
   1. I can't see sub-tasks, as people forget to populate that field, while their manage work on issues
2. JQL: project = sw AND ("sw team" = ABC OR "Sw Team" is EMPTY) ....
   1. I'm getting sub-tasks of stories that are not on my board, as they have their sw team = Other_team while its sub-tasks keep it EMPTY.

Why does sub-tasks of issues not in filter appear on this board? Sub-tasks should be with their mama&papas, and not running along far from them! :)

Seriously, I accept that they may appear (its a issue as any other and comply with filter), but there should be a JQL options to filter this out.  And please... don't suggest me plugins that will cost me almost as much as JIRA itself.

[Ignacio Pulgar]

Hi Pablo,

With no third party plugins, I'd suggest setting Sw Team as a required field for sub-tasks.

If you're on a Jira Cloud instance, then a convenient post-function would be at your disposal: Copy field value from parent issue. You may use that function to automatically copy the Sw Team value on sub-task creation, by adding it to the Create transition in the sub-task's workflow (diagram mode).

If you're on a Jira Server instance, maybe you already count with a third party addon that can help us, as there are so many that could be useful here...

[Pablo Osorio da Silva]

Thanks Ignacio. 

I'm using Jira Cloud and got to add an post-function using option Copy Value From Other Field which enables you to copy field from same, parent or sub issue.