json.exercise do
  json.extract! @bank, :id, :name, :description, :is_public
end

json.partial! "exercises/exercise_scores"

json.exercise_questions do
  json.array! @exercise_questions do |q|
    json.partial! "exercise_questions/exercise_questions",
                  question: q,
                  choices:q.exercise_bank_choices,
                  shixun_challenges: q.exercise_bank_shixun_challenges,
                  exercise_type:1,
                  user_answer:[],
                  shixun_type:0,
                  ques_position:nil,
                  edit_type:nil
  end
end