I would like to create a Transition Validator using the Simple Scripted Validator to check the Assignee field is blank or unassigned at the time of transition. It seems logical to me I could take the example provided "Assignee changed (Workflow functions only)"
issue.assignee != originalIssue.assignee
And change it to:
issue.assignee == NULL
But I get an error about NULL being an undeclared variable.
Is there a simple 1 or 2 line way to do this?
I have other fields I would also like to verify the values of or verify they have or don't have a value when transitioning an issue. Would it be different for other types of fields?