{"provider_name":"Hatena Blog","description":"\u554f\u984c \u30d6\u30fc\u30ea\u30a2\u30f3\u5024 hoge \u304c ture \u4ee5\u5916\u3092\u691c\u7d22\u3057\u305f\u3044 DB\u306e\u72b6\u614b db\u306b\u30ab\u30e9\u30e0 foobar \u3067 nil x5\u3001false x1\u3001true\u3001x0\u3002 true\u4ee5\u5916\u304c\u8a086\u30b3\u3002 User.where(:foobar => nil).count (0.3ms) SELECT COUNT(*) FROM `users` WHERE `users`.`foobar` IS NULL => 5 User.where(:foobar => false).count (0.3ms) SELECT COUNT(*) FROM `users` WHERE `users`.`foobar` = 0 => 1 \u2026","author_name":"CortYuming","published":"2013-03-14 00:00:00","width":"100%","version":"1.0","type":"rich","author_url":"https://blog.hatena.ne.jp/CortYuming/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fcortyuming.hateblo.jp%2Fentry%2F20130314%2Fp2\" title=\" Rails3 \u3067 true, false, nil \u306e\u6df7\u3058\u3063\u305f\u30d6\u30fc\u30ea\u30a2\u30f3\u5024\u3092 where\u3067\u691c\u7d22\u3059\u308b\u306e\u306b\u82e5\u5e72\u30cf\u30de\u3063\u305f\u306e\u3067\u30e1\u30e2 - \u724c\u8a9e\u5099\u5fd8\u9332 -pygo\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":null,"categories":["Rails"],"url":"https://cortyuming.hateblo.jp/entry/20130314/p2","height":"190","title":" Rails3 \u3067 true, false, nil \u306e\u6df7\u3058\u3063\u305f\u30d6\u30fc\u30ea\u30a2\u30f3\u5024\u3092 where\u3067\u691c\u7d22\u3059\u308b\u306e\u306b\u82e5\u5e72\u30cf\u30de\u3063\u305f\u306e\u3067\u30e1\u30e2","provider_url":"https://hatena.blog","blog_title":"\u724c\u8a9e\u5099\u5fd8\u9332 -pygo","blog_url":"https://cortyuming.hateblo.jp/"}