Is it possible to limit a transition by a time of day

[Stan]

Is it possible to prevent someone from executing a transition in workflow based on a time limit?  I'd like to prevent the transition if it's, for example, after 12pm, but only if it's 12pm on the scheudled start date. My thoughts are to use a validator where the  might look something like "Start Time" < startOfDay(+11h), but the syntax is not allowed.

[GabrielleJ]

Quick thought is you can do this via a Script Validator that validates the current time to allow the transition or not.

Reference: https://scriptrunner.adaptavist.com/latest/jira/recipes/workflow/validators/simple-scripted-validators.html

[Nic Brough -Adaptavist-]

Another option which may be nicer for the users is to put the same logic into a scripted condition.  A condition hides the transition from the user when they look at the issue, so they can't use it.  A validator lets them start a transition, but pulls them up when they try to commit it. 

A validator has the advantage that you can tell them why they can't do something, rather than have them ask you "why can't i do X to the issue?", but the disadvantage that they can get stroppy if they enter all their data only to be told they can't do it.