{"type":"rich","provider_name":"Hatena Blog","url":"https://sue445.hatenablog.com/entry/2015/08/06/114914","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsue445.hatenablog.com%2Fentry%2F2015%2F08%2F06%2F114914\" title=\"ActiveRecord::Relation\u3092\u8fd4\u3055\u306a\u3044\u30af\u30a8\u30ea\u306b\u5bfe\u3057\u3066\u96d1\u306bexplain\u3059\u308b\u65b9\u6cd5 - \u304f\u308a\u306b\u3063\u304d\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"ActiveRecord::Relation\u3092\u8fd4\u3055\u306a\u3044\u30af\u30a8\u30ea\u306b\u5bfe\u3057\u3066\u96d1\u306bexplain\u3059\u308b\u65b9\u6cd5","blog_url":"https://sue445.hatenablog.com/","provider_url":"https://hatena.blog","blog_title":"\u304f\u308a\u306b\u3063\u304d","author_url":"https://blog.hatena.ne.jp/sue445/","categories":["Rails"],"version":"1.0","image_url":null,"author_name":"sue445","description":"\u6700\u521d\u306b\u307e\u3068\u3081 tap \u4fbf\u5229\u3060\u3063\u305f \u3084\u308a\u305f\u304b\u3063\u305f\u3053\u3068 SomeHistory. # 5\u301c6\u884c\u304f\u3089\u3044\u306e\u306a\u3093\u304b\u8907\u96d1\u306a ActiveRecord::Relation \u306e\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3 pluck(:user_id) \u3053\u3046\u3044\u3046\u30af\u30a8\u30ea\u306b\u5bfe\u3057\u3066\u96d1\u306b\u5b9f\u884c\u8a08\u753b\u3092\u3068\u308a\u305f\u304b\u3063\u305f pluck \u3092\u547c\u3093\u3060\u6642\u70b9\u3067\u623b\u308a\u5024\u304cArray\u306b\u306a\u308b\u306e\u3067 pluck(:user_id).explain \u3063\u3066\u306e\u306f\u3067\u304d\u306a\u3044\u3002 \u304b\u3068\u3044\u3063\u3066explain\u306e\u305f\u3081\u3060\u3051\u306b5\u301c6\u884c\u304f\u3089\u3044\u3042\u308b\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u30b3\u30d4\u30da\u3057\u305f\u304f\u306a\u304b\u3063\u305f\u306e\u3067\u3069\u3046\u3059\u3063\u304b\u306a\u30fc\u3068\u601d\u3063\u305f\u3089 tap \u3092\u601d\u3044\u3064\u3044\u305f \u3084\u308a\u65b9 pluck\u3092\u547c\u3076\u76f4\u524d\u306btap\u3092\u4ed5\u8fbc\u3093\u3067explain SomeHi\u2026","published":"2015-08-06 11:49:14","height":"190"}