{"categories":[],"height":"190","version":"1.0","provider_url":"https://hatena.blog","title":"Ruby on Rails \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3067boolean\u3092\u5fc5\u9808\u306b\u3057\u305f\u3044","description":"\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3067boolean\u306e\u5c5e\u6027\u3092\u5fc5\u9808\u306b\u3057\u305f\u304f\u3066presence\u3092\u4f7f\u3063\u305f\u3089\u3046\u307e\u304f\u3044\u304b\u306a\u304b\u3063\u305f\u3002 # \u30c0\u30e1\u306a\u4f8b validates :flag, :presence => true \u203bflag\u306fboolean \u3069\u3046\u3084\u3089presence\u306f\u7a7a\u767d\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3063\u3066\u304a\u308a\u3001false\u306f\u7a7a\u767d\u3068\u5224\u5b9a\u3055\u308c\u3066\u3057\u307e\u3046\u3088\u3046\u3060\u3002\u305d\u3053\u3067\u3001inclusion\u3092\u4f7f\u3063\u305f\u3089\u3046\u307e\u304f\u3044\u3063\u305f\u3002 validates :flag, :inclusion => {:in => [true, false]} \u53c2\u8003\uff1aboolean\u306evalidation - \u4e2d\u56fd\u3067Ruby on Rails","provider_name":"Hatena Blog","blog_url":"https://ayaketan.hatenablog.com/","author_url":"https://blog.hatena.ne.jp/ayaketan/","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fayaketan.hatenablog.com%2Fentry%2F2012%2F12%2F22%2F203728\" title=\"Ruby on Rails \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3067boolean\u3092\u5fc5\u9808\u306b\u3057\u305f\u3044 - ayaketan\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u52c9\u5f37\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://ayaketan.hatenablog.com/entry/2012/12/22/203728","blog_title":"ayaketan\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u52c9\u5f37\u65e5\u8a18","published":"2012-12-22 20:37:28","width":"100%","author_name":"ayaketan","type":"rich"}