Unpublishing.from_slug('cabinet-office-staff-and-salary-data-30-september-2012', Publication).
  update_column(:alternative_url, 'https://www.gov.uk/government/publications/cabinet-office-staff-and-salary-data-30-september-2012--2')

Update alternative_url for unpublished edition
Update alternative_url for unpublished edition

https://www.pivotaltracker.com/story/show/46443439
