{"categories":["Ruby"],"author_name":"ayaketan","type":"rich","url":"https://ayaketan.hatenablog.com/entry/2013/10/02/171141","description":"Rails4\u3067\u306ffirst\u3092\u4f7f\u3046\u4ee3\u308f\u308a\u306b\u3001find_by\u3067\u3082\u3063\u3068\u30b9\u30de\u30fc\u30c8\u306b\u66f8\u3051\u308b\u3088\u3046\u3067\u3059\u3002first\u3092\u4f7f\u3063\u305f\u5834\u5408 User.where(:school_id => 1, :class_id => 1).first find_by\u3092\u4f7f\u3063\u305f\u5834\u5408 User.find_by(:school_id => 1, :class_id => 1) to_sql\u306f\u4f7f\u3048\u306a\u3044\u306e\u3067\u3001\u8272\u3005\u306a\u30d1\u30bf\u30fc\u30f3\u3067\u5b9f\u9a13\u3057\u307e\u3057\u305f\u304c\u3001\u7d50\u679c\u306f\u540c\u3058\u3067\u3057\u305f\u3002 \u3061\u3087\u3063\u3068\u3060\u3051\u30b9\u30de\u30fc\u30c8\u306a\u30bd\u30fc\u30b9\u306b\u306a\u308a\u305d\u3046\u306a\u306e\u3067\u3001\u3053\u308c\u304b\u3089\u306ffind_by\u3092\u4f7f\u3044\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002 \u53c2\u8003\uff1a Rails \u3067\u5341\u5206\u306b\u6d3b\u7528\u3055\u308c\u3066\u3044\u306a\u304f\u3066\u3082\u3063\u305f\u3044\u306a\u3044 ActiveRecord::Re\u2026","width":"100%","blog_url":"https://ayaketan.hatenablog.com/","blog_title":"ayaketan\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u52c9\u5f37\u65e5\u8a18","published":"2013-10-02 17:11:41","provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/ayaketan/","provider_url":"https://hatena.blog","height":"190","version":"1.0","title":"Rails4 find_by\u3067\u3061\u3087\u3063\u3068\u30b9\u30de\u30fc\u30c8\u306b","image_url":null,"html":""}