{"categories":["Rails","\u5b9f\u88c5","ActiveRecord"],"version":"1.0","type":"rich","image_url":null,"width":"100%","description":"before_xxx, after_xxx\u3068\u3044\u3063\u305fActiveRecord\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u7279\u5b9a\u306e\u6761\u4ef6\u3067\u7d5e\u308a\u8fbc\u307f\u3057\u305f\u3044\u6642\u306f\u3001 if\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4f7f\u3046\u306e\u304c\u697d\u3002 after_update :update_fuga, if: -> { saved_change_to_hoge_column? } \u305f\u3060\u3053\u308c\u3060\u3068\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u306b\u5f15\u6570\u3092\u6307\u5b9a\u3057\u305f\u3044\u6642\u306b\u4e0a\u624b\u304f\u3044\u304b\u306a\u3044\u3002 \u305d\u3046\u3044\u3063\u305f\u5834\u5408\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30e9\u30e0\u30c0\u5f0f\u306e\u4e2d\u3067\u81ea\u5206\u3067ruby\u306e\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u3057\u307e\u3048\u3070\u3044\u3044\u3002 after_update -> { update_fuga(\"fuga\") if saved_change_to_hoge_column? } \u4fbf\u5229\u3002","provider_url":"https://hatena.blog","provider_name":"Hatena Blog","title":"Rails\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3092if\u3067\u7d5e\u308a\u3064\u3064\u5f15\u6570\u3092\u6307\u5b9a\u3059\u308b\u65b9\u6cd5","blog_url":"https://masarufuruya.hatenadiary.jp/","url":"https://masarufuruya.hatenadiary.jp/entry/2020/05/08/094641","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmasarufuruya.hatenadiary.jp%2Fentry%2F2020%2F05%2F08%2F094641\" title=\"Rails\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3092if\u3067\u7d5e\u308a\u3064\u3064\u5f15\u6570\u3092\u6307\u5b9a\u3059\u308b\u65b9\u6cd5 - 1\u65e51%\u6210\u9577\u3059\u308b\u30d6\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>","published":"2020-05-08 09:46:41","blog_title":"1\u65e51%\u6210\u9577\u3059\u308b\u30d6\u30ed\u30b0","author_url":"https://blog.hatena.ne.jp/masaru_furuya/","author_name":"masaru_furuya"}