へえhttps://jp.quora.com/Rails%E3%82%92%E3%82%AA%E3%83%AF%E3%82%B3%E3%83%B3%E6%89%B1%E3%81%84%E3%81%99%E3%82%8B%E4%BA%BA%E3%81%8C%E5%A2%97%E3%81%88%E3%81%9F%E3%81%AE%E3%81%AF%E3%81%AA%E3%81%9C%E3%81%A7%E3%81%97%E3%82%87%E3%81%86/answers/1477743766920906?ch=10&oid=1477743766920906&share=2ff3f2a2&srid=eDeAO&target_type=answer
思考の /dev/null
