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Use case
Allow a certain transition in Epic's workflow to be executed, only if all its tasks are unresolved and have a due date set.
Configuration
Add the Logical validator to the desired workflow transition.
Expression*
Add the following expression:
count(filterByPredicate(linkedIssues("is Epic of"), ^%{00028} != null OR ^{00012} = null)) = 0
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Related examples
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