How do you prevent a Jira Workflow transition if no one is assigned to the issue?

Question

I am working on creating a custom workflow in Jira. Our first state is ASSESSMENT and that transfers to the ASSIGNED state. There are a few things that have to be done during the ASSESSMENT state before we should transfer to the ASSIGNED state, one of which is assigning the issue to someone. Is it possible to prevent someone from transitioning to the ASSIGNED state unless there is someone assigned to the issue? If so, how is that done?

Thank you!

Charles

Pavel Rusakov · Answer

@Charles Fleck what the validator do you use ?

Charles Fleck · Answer

Update: I got it working! It was actually a validator that I needed to add to the transition. There's an option for validators that allows you to not execute a transition unless it is assigned to someone.

Charles Fleck · Answer

But if we give our Project Managers permissions to change states, they will be able to do it when it is unassigned. Our hope is that the PM is able to manage the Jira transitions even though it is assigned to the engineer working on the issue. We were trying to prevent the PM from changing the state until the engineer was assigned.