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find_or_initialize_byの使い方

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#find_or_initialize_byって?
モデルから渡したパラメーターに該当するものを探してくれるんだけど、あればそれを返すし、なかったらnewしてインスタンスを作ってくれるみたい!

似たようなメソッドでfind_or_create_byというcreateしてくれるものもあるらしい。

profile.update_attributes(profile_params)でバリデーションにひっかからなかったら(createorupdateしてくれる!)

reviews_controller.rb


  def create_profile
    session[:review_area_key] = params[:review_area_key]
    session[:review_provider_id] = params[:review_provider_id]
    session[:review_plan_id] = params[:review_plan_id]

    profile_params = params.permit(:nickname, :gender, :icon, :icon_color, :age, :prefecture,
                                   :provider_id, :plan_id, :month, :price, :from, :is_hikkoshi)
    session[:profile_params] = profile_params
    profile = UserProfile.find_or_initialize_by(user_id: current_user.id) ⭐️ここ
    if profile.update_attributes(profile_params)
      if (alerts = alerts_if_no_review_plan(params)).blank?
        redirect_to reviews_new2_path
      else
        redirect_to reviews_new_path(f: params[:from]), alert: alerts
      end
    else
      redirect_to reviews_new_path(f: params[:from]), alert: profile.errors.full_messages
    end
  end

いい記事 !https://qiita.com/taimuzu/items/0a21738d018f475d63ae

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