Make a custom field mandatory if assignee belongs to a user group

[Mohammad Abu Tame]

I have a custom field that want to be mandatory (on ticket creation) if the assignee user is member of a user group.

[Martin Bayer _MoroSystems_ s_r_o__]

Hi @Mohammad Abu Tame  you will definitely need some Marketplace App. I use ScriptRunner and Validator written as Jira expression can look like:

issue.assignee !=null && issue.assignee.groups.includes("site-admins") && issue.comments.length>0

1. it checks that assignee is not null
2. and assignee's groups contains group site-admins
3. and issue has at least one comment (you didn't specify the type of the custom field)

I hope it'll help :)