Progate学習メモ
view.rb
<input name="image" type="file">
controller.rb
image = params[:image]
# File.binwrite("path_to_画像ファイルを保存するフォルダ/画像ファイル名", 画像データ.read)
File.binwrite("public/user_images/#{@user.image_name}", image.read)
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