{"image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.tmtms.net%2Fentry%2F20120608%2Frails_unique\" title=\"Rails \u3067\u30e6\u30cb\u30fc\u30af\u5236\u7d04 \u305d\u306e\uff12 - tmtms \u306e\u30e1\u30e2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%","provider_name":"Hatena Blog","categories":["Rails"],"published":"2012-06-08 00:00:00","blog_url":"https://blog.tmtms.net/","version":"1.0","author_url":"https://blog.hatena.ne.jp/tmtms/","url":"https://blog.tmtms.net/entry/20120608/rails_unique","title":"Rails \u3067\u30e6\u30cb\u30fc\u30af\u5236\u7d04 \u305d\u306e\uff12","author_name":"tmtms","blog_title":"tmtms \u306e\u30e1\u30e2","type":"rich","description":"Rails \u3067\u30e6\u30cb\u30fc\u30af\u5236\u7d04\u3092\u884c\u3046\u305f\u3081\u306b\u306f\u3001\u30e2\u30c7\u30eb\u306b validates_uniqueness_of \u3092\u8a2d\u5b9a\u3057\u3066\u3001\u30b9\u30ad\u30fc\u30de\u3067\u30e6\u30cb\u30fc\u30af\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8a2d\u5b9a\u3057\u3066\u304a\u304f\u3068\u3044\u3046\u8a71\u3092\u66f8\u304d\u307e\u3057\u305f(https://tmtms.hatenablog.com/entry/20120602/rails_unique)\u3002\u304c\u3001\u305d\u308c\u3060\u3051\u3067\u306f\u5341\u5206\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u307e\u305f\u8efd\u304f\u30cf\u30de\u3063\u305f\u306e\u3067\u30e1\u30e2\u3057\u3066\u304a\u304d\u307e\u3059\u3002\u30e6\u30cb\u30fc\u30af\u9805\u76ee\u306e\u5024\u304c\u65e2\u5b58\u304b\u3069\u3046\u304b\u3092\u8abf\u3079\u308b\u305f\u3081\u306e\u30af\u30a8\u30ea\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3057\u305f\u3002 SELECT 1 FROM `users` WHERE `users`.`login` = BINARY 'hoge' LIMIT 1 \u3088\u304f\u898b\u308b\u3068\u2026","height":"190","provider_url":"https://hatena.blog"}