json.member_attendances @member_attendances.each_with_index.to_a do |member, index|
  json.(member, :user_id, :attendance_status)
  json.index (@page.to_i - 1) * @limit.to_i + index + 1
  json.user_name member.user&.real_name
  json.student_id member.user&.student_id
end

# json.member_attendances @members.each_with_index.to_a do |member, index|
#   json.(member, :user_id)
#   json.index (@page.to_i - 1) * @limit.to_i + index + 1
#   json.user_name member.user&.real_name
#   json.student_id member.user&.student_id
#   json.attendance_status @member_attendances.select{|attendance| attendance.course_member_id == member.id}.first&.attendance_status || "ABSENCE"
# end

json.members_count @members_count