How to prevent an issue changing of status if assignee is unassigned?

[Bridgestone]

Hi,

I want to prevent a user to be able to change the status of an issue if the assignee is still unassigned. How can I do that? validator? Conditions? Scripts..?

Thanks!

Mark

[Bart Meerveld]

Either a scripted validator or something like this: https://confluence.atlassian.com/jira/how-to-make-the-assignee-field-required-when-allow-unassigned-issues-is-turn-on-in-general-configuration-298976490.html

[Nic Brough -Adaptavist-]

Validators are the way to do it.  You'll need to find or write one (or script one) that can simply check that the assignee field is not empty.