zipを使った中間テーブルへのレコード追加 - Qiita

def create answer = Answer.new(answer_params) dates = answer.dates sc_answers_params.zip(dates) do |status, date| answer.sc_answers.build(date_id: date.id, status:) end if answer.save render json: [answer, answer.sc_answers] else render json: answer.errors end end