How to check if a custom field contains data prior to allowing transition?

Question

Hey there,

I'm trying to figure out how check if there's any data in a specific custom field prior to allowing a transition from In Progress to Done.

I chose the correct transition and clicked Validators and am now looking for the right option. I have scriptrunner and was hoping it would allow a JQL based validator but no dice there. If I'm stuck using jira expressions what is the one to check if it contains data and/or is not empty? It's custom field 10102 if that makes a difference.

Thanks in advance to anyone willing to point me in a direction :)  I checked this forum as well as google and youtube but alas.

Mike Prill · Answer

It was a text field, sorry I didn't state that initially.

Alan Stephenson · Answer

What is the type of the custom field?

possible options could be field is not empty or field is not null

Mike Prill · Answer

Looks like issue.customfield_10102.length > 0 within a validator gets me what the experience I want. If anyone knows how to do this in JQL instead that would be amazing.