json.subject_id @subject.id
json.subject_name @subject.name
json.learn_count @learn_count
json.course_count @course_count
json.schools_count @schools_count
json.school_total_count @school_total_count

json.schools @schools.try(:each) do |school|
  json.name school[:name]
  json.course_count school[:course_count]
  json.student_count school[:student_count]
  json.homework_count school[:homework_count]
end

index = 0
json.stage_info @stage_user_info.each do |stage|
  json.stage_no "第#{index + 1}章"
  json.value @sum == 0 ? 0 : (stage * 100 / @sum.to_f).round
  index += 1
end