class AddAnswerForChallengeAnswer < ActiveRecord::Migration[5.2]
  def change
    challenges = Challenge.where("answer is not null")
    challenges.find_each do |c|
      puts "####################{c.id}"
      ChallengeAnswer.create(name: "解题代码", contents: "#{c.answer}", level: 1, score: 100, challenge_id: c.id)
    end

  end
end