test.rb

sheriff = Proprietor.find_by(name: "Sheriff")
Building.where(proprietor: sheriff).each do |building|
  building.photo.purge
  building.attachments.each do |attachment|
    attachment.file.purge
  end
  building.floor_plans.each do |floor_plan|
    floor_plan.blueprint.purge
  end
  building.building_systems.each do |system|
    system.attachments.each do |attachment|
      attachment.file.purge
    end
  end
  building.deficiencies.each do |deficiency|
    deficiency.attachments.each do |attachment|
      attachment.file.purge
    end
  end
  building.devices.each do |device|
    device.attachments.each do |attachment|
      attachment.file.purge
    end
  end
  building.distress_samples.each do |sample|
    sample.attachments.each do |attachment|
      attachment.file.purge
    end
  end
  building.report_archives.each do |archive|
    archive.archived_reports.each do |report|
      report.attachment.purge
    end
  end
end