{"provider_url":"https://hatena.blog","image_url":null,"blog_title":"\u30b3\u30fc\u30c9\u65e5\u9032\u6708\u6b69","title":"Rails\u306eActiveRecord\u3067\u4e3b\u30ad\u30fc\u306e\u914d\u5217\u3092\u53d6\u308a\u305f\u3044\u5834\u5408\u306fids\u30e1\u30bd\u30c3\u30c9\u3067\u53d6\u5f97\u3067\u304d\u308b","version":"1.0","categories":["Ruby","Rails"],"height":"190","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fshinkufencer.hateblo.jp%2Fentry%2F2025%2F09%2F13%2F153752\" title=\"Rails\u306eActiveRecord\u3067\u4e3b\u30ad\u30fc\u306e\u914d\u5217\u3092\u53d6\u308a\u305f\u3044\u5834\u5408\u306fids\u30e1\u30bd\u30c3\u30c9\u3067\u53d6\u5f97\u3067\u304d\u308b - \u30b3\u30fc\u30c9\u65e5\u9032\u6708\u6b69\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"pluck(:id) \u3092\u4f7f\u3063\u3066\u3044\u305f\u306e\u3067\u30e1\u30e2\u7a0b\u5ea6\u306b\u3002 \u52d5\u4f5c\u74b0\u5883 $ bin/rails -v Rails 7.1.2 \u5b9f\u4f8b Author\u3068\u3044\u3046\u30e2\u30c7\u30eb\u304c\u3042\u3063\u305f\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u53d6\u5f97\u3067\u304d\u308b Author.ids # => [1, 2, 3] Author Ids (0.6ms) SELECT `authors`.`id` FROM `authors` # => Array \u3053\u3061\u3089\u306fModel\u5074\u3067\u4e3b\u30ad\u30fc\u3092\u5225\u306e\u3082\u306e\u306b\u6307\u5b9a\u3057\u3066\u3044\u308b\u5834\u5408\u3067\u3082\u3088\u3057\u306a\u306b\u8a72\u5f53\u30ab\u30e9\u30e0\u3092\u5f15\u304d\u5f53\u3066\u3066\u304f\u308c\u308b\u306e\u3067\u3001\u305d\u306e\u70b9\u3067\u306fpluck(:id)\u3088\u308a\u3082\u89aa\u5207 \u5b9f\u30b3\u30fc\u30c9 \u5b9f\u969b\u306e\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3001\u518d\u5e30\u7684\u306a\u3053\u3068\u3092\u3084\u3063\u3066\u3044\u308b\u306e\u3067\u308f\u304b\u308a\u306b\u304f\u3044\u304c pri\u2026","width":"100%","author_name":"shinkufencer","author_url":"https://blog.hatena.ne.jp/shinkufencer/","type":"rich","url":"https://shinkufencer.hateblo.jp/entry/2025/09/13/153752","blog_url":"https://shinkufencer.hateblo.jp/","published":"2025-09-13 15:37:52"}