{"published":"2019-10-01 19:15:58","blog_url":"https://ayacai115.hateblo.jp/","provider_url":"https://hatena.blog","version":"1.0","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fayacai115.hateblo.jp%2Fentry%2F2019%2F10%2F01%2F191558\" title=\"ActiveRecord\u306escope\u3067\u306ffind_by\u3057\u306a\u3044\u65b9\u304c\u3088\u3044 - \u30b9\u30b3\u30fc\u30f3\u306e\u958b\u767a\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>","height":"190","author_url":"https://blog.hatena.ne.jp/ayacai115/","image_url":null,"provider_name":"Hatena Blog","width":"100%","categories":["Ruby on Rails"],"description":"find_by\u3057\u3066\u3057\u307e\u3046\u3068\u2026 ActiveRecord\u306escope\u3067\u306f\u3001\u30af\u30a8\u30ea\u306e\u5b9f\u884c\u7d50\u679c\u304cnil\u3060\u3068all\u3092\u8fd4\u3057\u3066\u3057\u307e\u3046\u3002 class Order < ActiveRecord::Base scope :bar, -> { find_by(foo: 'bar') } end Order.find_by(foo: 'bar')\u3068\u540c\u3058\u52d5\u304d\u3060\u3068\u601d\u3063\u3066nil\u3092\u671f\u5f85\u3059\u308b\u3068\u3001all\u304c\u8fd4\u308b\u3002 # \u30ec\u30b3\u30fc\u30c9\u304c\u3042\u308b\u3068\u304d Order.bar => #<Order ...> # ActiveRecord::Relation\u3067\u306f\u306a\u304f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u8fd4\u308b # \u30ec\u30b3\u30fc\u30c9\u304c\u306a\u3044\u3068\u304d Order.bar => [#<Orde\u2026","blog_title":"\u30b9\u30b3\u30fc\u30f3\u306e\u958b\u767a\u65e5\u8a18","author_name":"ayacai115","title":"ActiveRecord\u306escope\u3067\u306ffind_by\u3057\u306a\u3044\u65b9\u304c\u3088\u3044","url":"https://ayacai115.hateblo.jp/entry/2019/10/01/191558","type":"rich"}