json.lives @lives do |live|
  json.(live, :id, :description, :on_status, :duration, :course_name, :platform)
  json.url live.on_status ? live.url : ""
  json.author_name live.user.show_real_name
  json.author_login live.user.login
  json.author_img url_to_avatar(live.user)
  json.op_auth live.op_auth?
  json.delete_auth live.delete_auth?
  json.live_time live.live_time&.strftime('%Y-%m-%d %H:%M:%S')
end
json.my_live_id @my_live_id
json.total_count @total_count