json.students do
  json.array! @students do |student|
    json.user_id student.user_id
    json.login student.user.try(:login)
    json.name student.user.try(:real_name)
    json.student_id student.user.try(:student_id)
    json.course_member_id student.id
    json.user_phone @course.excellent ? "" : student.user.hidden_phone
    json.image_url url_to_avatar(student.user)
  end
end
json.students_count @students_count