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Railsで画像を保存するメモ

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ソースコード

  def create
    # 登録用
    product = Product.new(name:  params['name'], price: params['price'], description: params['description'])

    if params[:image]
      extension = File.extname(params[:image].original_filename)
      random_filename = SecureRandom.uuid + extension
      product.image = random_filename
      image = params[:image]
      File.binwrite("public/products/#{product.image}", image.read)
    else
      product.image = "defalut.png"
    end

    if product.save
      flash[:notice] = "出品に成功しました"
      redirect_to('/home/top')
    else
      flash[:notice] = "出品に失敗しました"
      render("products/sell")
    end
  end

説明

extension = File.extname(params[:image].original_filename)
random_filename = SecureRandom.uuid + extension
  • extension = File.extname(params[:image].original_filename)
    • params[:image].original_filenameで元画像の拡張子を保存
    • File.extnameでファイル名から拡張子を取得
  • random_filename = SecureRandom.uuid + extension
    • ランダムな一意のファイル名を生成する
    • SecureRandom.uuidで一意のランダムな文字列を生成
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