{"blog_title":"patorash\u306e\u30d6\u30ed\u30b0","url":"https://patorash.hatenablog.com/entry/2021/07/17/032507","description":"\u8ab2\u984c\uff1a\u30c7\u30fc\u30bf\u3092\u5f3e\u304f\u305f\u3081\u306bN+1\u554f\u984c\u304c\u767a\u751f\u3057\u3066\u3044\u305f \u6570\u5e74\u524d\u306b\u5b9f\u88c5\u3057\u305f\u3001CSV\u30c7\u30fc\u30bf\u3092DB\u306b\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\u305f\u3081\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u3042\u308a\u307e\u3057\u305f\u3002 \u5358\u306b\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\u3060\u3051\u306a\u3089\u3044\u3044\u306e\u3067\u3059\u304c\u3001\u9664\u5916\u30ea\u30b9\u30c8\u306b\u767b\u9332\u6e08\u306e\u30c7\u30fc\u30bf\u306f\u5f3e\u3044\u3066\u307b\u3057\u3044\u3001\u3068\u3044\u3046\u8981\u671b\u304c\u3042\u308a\u3001\u305d\u306e\u3088\u3046\u306b\u5b9f\u88c5\u3057\u3066\u3044\u307e\u3057\u305f\u3002 \u4ee5\u4e0b\u3001\u30c0\u30df\u30fc\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u3059\u3002\u30e2\u30c7\u30eb\u540d\u3084CSV\u306e\u5185\u5bb9\u306f\u5909\u3048\u3066\u3042\u308a\u307e\u3059\u3002 require 'csv' csv = CSV.read('list.csv', { headers: true, return_headers: false, skip_blanks: true, encoding: 'UTF-8' }) import_data\u2026","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fpatorash.hatenablog.com%2Fentry%2F2021%2F07%2F17%2F032507\" title=\"exists?\u3067\u8d77\u304d\u308bN+1\u554f\u984c\u306b\u5bfe\u51e6\u3059\u308b\u305f\u3081\u306bSet\u3092\u4f7f\u3063\u305f\u8a71 - patorash\u306e\u30d6\u30ed\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","type":"rich","author_name":"patorash","categories":["Ruby","Ruby on Rails"],"blog_url":"https://patorash.hatenablog.com/","provider_url":"https://hatena.blog","published":"2021-07-17 03:25:07","provider_name":"Hatena Blog","image_url":"https://m.media-amazon.com/images/I/5186AWFoSXL._SL500_.jpg","author_url":"https://blog.hatena.ne.jp/patorash/","title":"exists?\u3067\u8d77\u304d\u308bN+1\u554f\u984c\u306b\u5bfe\u51e6\u3059\u308b\u305f\u3081\u306bSet\u3092\u4f7f\u3063\u305f\u8a71","version":"1.0","height":"190"}