{"id":8289,"date":"2022-06-20T06:09:15","date_gmt":"2022-06-19T21:09:15","guid":{"rendered":"https:\/\/yumishin.com\/?p=8289"},"modified":"2022-06-20T06:11:35","modified_gmt":"2022-06-19T21:11:35","slug":"rails-3","status":"publish","type":"post","link":"https:\/\/yumishin.com\/?p=8289","title":{"rendered":"\u3010Rails\u3011\u30ed\u30b0\u306a\u3069\u306b\u4f7f\u3048\u308b\u64cd\u4f5c\u5c65\u6b74\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<h2 id=\"i-0\">\u3010Rails\u3011\u30ed\u30b0\u306a\u3069\u306b\u4f7f\u3048\u308b\u64cd\u4f5c\u5c65\u6b74\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5<\/h2>\n<p>\u30e6\u30fc\u30b6\u30fc\u306e\u60c5\u5831\u3092\u66f4\u65b0\u3057\u305f\u3068\u304d\u306a\u3069\u3001\u3069\u306e\u30e6\u30fc\u30b6\u30fc\u306e\u3069\u306e\u60c5\u5831\u3092\u3069\u306e\u3088\u3046\u306b\u66f4\u65b0\u3057\u305f\u306e\u304b\u53d6\u5f97\u3057\u305f\u3044\u6642\u306f\u3042\u308a\u307e\u305b\u3093\u304b\uff1f<\/p>\n<p>\u4eca\u56de\u306f\u305d\u3093\u306a\u6642\u306b\u4f7f\u3048\u308bActiveRecord::AttributeMethods::Dirty\u3068\u3044\u3046\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u7d50\u8ad6\u304b\u3089\u3044\u3046\u3068\u30ec\u30b3\u30fc\u30c9\u306e\u66f4\u65b0\u524d\u30fb\u66f4\u65b0\u5f8c\u306e\u72b6\u6cc1\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\ud83d\udc47\u306eURL\u3092\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>https:\/\/api.rubyonrails.org\/classes\/ActiveRecord\/AttributeMethods\/Dirty.html<\/p>\n<p>\u8272\u3005\u306a\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u4eca\u56de\u306fsaved_changes\u3068\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u307f\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u30e6\u30fc\u30b6\u30fc\u3092\u65b0\u305f\u306b\u4f5c\u6210\u3057\u305f\u305d\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u5bfe\u3057\u3066\u3001saved_changes\u3068\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u305d\u306e\u66f4\u65b0\u5185\u5bb9\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u7279\u306b\u30e6\u30fc\u30b6\u30fc\u3092\u66f4\u65b0\u3057\u305f\u3068\u304d\u306a\u3069\u306f\u3001\u3069\u3093\u306a\u3075\u3046\u306b\u5185\u5bb9\u3092\u66f4\u65b0\u3057\u305f\u306e\u304b\u307b\u3057\u3044\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u3046\u3044\u3063\u305f\u6642\u306f\u3053\u3061\u3089\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3068\u4fbf\u5229\u3067\u3059\u3002<\/p>\n<div class=\"pre_tag\"><span><i class=\"fa fa-code\"><\/i> \u30bf\u30fc\u30df\u30ca\u30eb<\/span><\/p>\n<pre><code>$ user.saved_changes #\u65b0\u305f\u306b\u30e6\u30fc\u30b6\u30fc\u3092\u4f5c\u6210\u3057\u305f\u306e\u3061\u3001\u305d\u306e\u30e6\u30fc\u30b6\u30fc\u306e\u60c5\u5831\u306b\u5bfe\u3057\u3066\u3001saved_changes\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\n=&gt; \n{\"id\"=&gt;[nil, 15],                                       \n \"name\"=&gt;[nil, \"hoge\u30d1\u30f3\u307e\u3093\"],                         \n \"created_at\"=&gt;                                         \n  [nil, Sun, 19 Jun 2022 21:01:30.050473000 UTC +00:00],\n \"updated_at\"=&gt;                                         \n  [nil, Sun, 19 Jun 2022 21:01:30.050473000 UTC +00:00]}<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u3010Rails\u3011\u30ed\u30b0\u306a\u3069\u306b\u4f7f\u3048\u308b\u64cd\u4f5c\u5c65\u6b74\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5 \u30e6\u30fc\u30b6\u30fc\u306e\u60c5\u5831\u3092\u66f4\u65b0\u3057\u305f\u3068\u304d\u306a\u3069\u3001\u3069\u306e\u30e6\u30fc\u30b6\u30fc\u306e\u3069\u306e\u60c5\u5831\u3092\u3069\u306e\u3088\u3046\u306b\u66f4\u65b0\u3057\u305f\u306e\u304b\u53d6\u5f97\u3057\u305f\u3044\u6642\u306f\u3042\u308a\u307e\u305b\u3093\u304b\uff1f \u4eca\u56de\u306f\u305d\u3093\u306a\u6642\u306b\u4f7f\u3048\u308bActiveRecord::Att &#8230; 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