Allow a certain transition in Epic's workflow to be executed, only if all its tasks are unresolved and have a due date set.
Add theĀ Logical validator to the desired workflow transition.
Add the following expression:
count(filterByPredicate(linkedIssues("is Epic of"), %{function.issue.resolution} != null AND {function.issue.dueDate} != null)) = 0
Logical validator
Logical condition
count()
filterByPredicate()
linkedIssues()