def restore_files
      draft.draft_uploads.each do |draft_upload|
        uploader = draft_upload.draftable_mount_column
        self.send(uploader + "=", draft_upload.file_data)
      end
    end
def restore_files
      draft.draft_uploads.each do |draft_upload|
        uploader = draft_upload.draftable_mount_column
        self.send(uploader + "=", draft_upload.file_data)
      end
    end
Attach draft files to the real object.

 @return [Draftable] the draftable object where CarrierWave uploads
   on the object have been replaced with their draft equivalents.