json.id attachment.id
json.title attachment.title
json.is_public attachment.publiced?
json.is_lock attachment.locked?(@is_member)
json.is_publish attachment.published?
json.publish_time attachment.publish_time
json.unified_setting attachment.unified_setting
json.filesize number_to_human_size(attachment.filesize)
json.quotes attachment.quotes_count
json.description attachment.description
json.downloads_count attachment.downloads_count
json.created_on attachment.created_on
json.url download_url(attachment) unless attachment.locked?(@is_member)