{"provider_url":"https://hatena.blog","type":"rich","blog_url":"https://mat5ukawa.hateblo.jp/","blog_title":"\u73fe\u5834\u30ed\u30b0","image_url":null,"title":"Model \u306b\u6563\u3089\u3070\u308b validates \u30e1\u30bd\u30c3\u30c9\u3092 concern \u3067\u96c6\u7d04\u3059\u308b","author_url":"https://blog.hatena.ne.jp/mat5ukawa/","provider_name":"Hatena Blog","published":"2014-08-07 02:25:38","categories":["Rails"],"version":"1.0","width":"100%","url":"https://mat5ukawa.hateblo.jp/entry/2014/08/07/022538","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmat5ukawa.hateblo.jp%2Fentry%2F2014%2F08%2F07%2F022538\" title=\"Model \u306b\u6563\u3089\u3070\u308b validates \u30e1\u30bd\u30c3\u30c9\u3092 concern \u3067\u96c6\u7d04\u3059\u308b - \u73fe\u5834\u30ed\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_name":"mat5ukawa","description":"\u3088\u304f\u3042\u308b\u4e8b\u4f8b validates \u3060\u3051\u3067 10 \u884c\u3050\u3089\u3044\u30af\u30e9\u30b9\u3092\u98df\u3044\u3064\u3076\u3059 app/models/book.rb class Book < ActiveRecord::Base validates_presence_of :name, :password ... validates_length_of :title, max ... validates_foo validates_bar validates_qux . . . validates_me end \u89e3\u6c7a\u7b56 (Rails 4 \u4ee5\u4e0a?) concern \u306e module \u306b\u96c6\u7d04\u3059\u308b app/models/concern/validat\u2026","height":"190"}