class MigrateExerciseSingleQuestionScore < ActiveRecord::Migration[5.2]
  def change
    # # 删除判断、单选题中生成多条记录，但exercise_choice_id不同的数据
    # sql = %Q(delete from exercise_answers where (exercise_question_id, user_id) in
    #         (select * from (select exercise_question_id, user_id from exercise_answers join exercise_questions eq on exercise_question_id = eq.id where eq.question_type in (0, 2) group by exercise_question_id, user_id having count(*) > 1) a)
    #         and id not in (select * from (select min(exercise_answers.id) from exercise_answers join exercise_questions eq on exercise_question_id = eq.id where eq.question_type in (0, 2) group by exercise_question_id, user_id having count(*) > 1 order by exercise_answers.id) b))
    # ActiveRecord::Base.connection.execute sql
    #
    # # 更新成绩
    # exercise_answers = ExerciseAnswer.joins(:exercise_question).where(score: -1, exercise_questions: {question_type: [0, 2]})
    # exercise_answers.includes(:exercise_choice, exercise_question: :exercise_standard_answers).find_each do |answer|
    #
    #   question = answer.exercise_question
    #   exercise_user = ExerciseUser.find_by(exercise_id: question.exercise_id, user_id: answer.user_id)
    #
    #   if exercise_user && exercise_user.commit_status == 1
    #     user_choice_position = answer.exercise_choice&.choice_position
    #     if user_choice_position && (user_choice_position.to_i == question.exercise_standard_answers.take&.exercise_choice_id.to_i)
    #       answer.update!(score: question.question_score)
    #       score = exercise_user.score.to_f + question.question_score
    #       objective_score = exercise_user.objective_score + question.question_score
    #       exercise_user.update!(score: score, objective_score: objective_score)
    #     end
    #   end
    # end
  end
end
