I use Script Runner Workflow Validator and I'd to block a transition upon a condition

Question

I use ScriptRunner Workflow Validator and I'd to block a transition upon a condition

The condition is: that the field "Dress code" (text) must be filled / not null - only if the custom field "Event type" is one of the values ("Night event"/ "Special event")

Lee-Or Efrati · Answer

@Nic Brough -Adaptavist-

From your rich experience point of view, there is any way to implement that in Jira could?

Lee-Or Efrati · Answer

The "dress code" is a text and the "event type" is a multi-checkbox

Anzar · Answer

What types are the two fields?