Transition validator that requires value but not modification during transition?

Question

I want to require that certain fields are populated, questions are met, etc. by certain milestones/transitions in a project. However, if the information is entered earlier than a transition, the user is forced to modify the value at the transition as well. Is there a solution for this issue? For example, an "if populated" validator option instead of a modification validator? This is for the OnDemand version of Jira.

Robin Garman · Answer

Thanks Timothy, but I don't know if that actually works for Jira OnDemand. We need to be able to a custom validator on the OnDemand version.

Timothy · Answer

You should be able to do this via the Script Runner add on or write your own custom validator. I guess you need to check if the value coming in the validator is the same as the value in the issue.