json.history_attendances @history_attendances do |attendance|
  json.(attendance, :id, :name)
  json.created_at attendance.created_at.strftime("%Y/%m/%d %H:%M")
  json.normal_count attendance.normal_count
  json.leave_count attendance.leave_count
  json.absence_count attendance.absence_count
  json.edit_auth @user_course_identity < Course::PROFESSOR || attendance.user_id == User.current.id
end
json.all_history_count @all_history_count