{"id":988,"date":"2010-01-07T00:43:03","date_gmt":"2010-01-06T15:43:03","guid":{"rendered":"https:\/\/wp-78qb7hnp.pistolfly.jp\/weblog\/2010\/01\/railsmodel.html"},"modified":"2013-01-28T11:25:17","modified_gmt":"2013-01-28T02:25:17","slug":"railsmodel","status":"publish","type":"post","link":"https:\/\/www.pistolfly.com\/weblog\/2010\/01\/railsmodel.html","title":{"rendered":"Rails\u3067model\u3092\u66f4\u65b0\u3059\u308b\u524d\u306b\u5909\u66f4\u5185\u5bb9\u3092\u77e5\u308b\u65b9\u6cd5"},"content":{"rendered":"<pre>model.changed?  \u5909\u66f4\u3055\u308c\u3066\u308b\u304b\u3069\u3046\u304b\u3002\r\nmodel.changed   \u5909\u66f4\u3055\u308c\u3066\u3044\u308battribute\u540d\u306e\u914d\u5217\u3002\r\nmodel.changes   \u5909\u66f4\u3055\u308c\u3066\u3044\u308battribute\u540d\u524d\u3068\u5024\u306e\u30cf\u30c3\u30b7\u30e5\u3002\u5024\u306f\u5909\u66f4\u524d\u66f4\u5f8c\u306e\u5024\u3092\u914d\u5217\u3067\u3002\r\nmodel.attr_changed?      attr\u304c\u5909\u66f4\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3002\r\nmodel.attr_was           attr\u306e\u5909\u66f4\u524d\u306e\u5024\u3002\u5909\u66f4\u3055\u308c\u3066\u306a\u304b\u3063\u305f\u3089\u5143\u306e\u5024\u3002\r\nmodel.attr_change        attr\u306e\u5909\u66f4\u524d\u5f8c\u306e\u5024\u306e\u914d\u5217\u3002\u5909\u66f4\u3055\u308c\u3066\u306a\u304b\u3063\u305f\u3089nil\u3002\r\nmodel.attr_will_change!  attr\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u3092\u660e\u793a\u3002<\/pre>\n<p><a href=\"http:\/\/d.hatena.ne.jp\/shunsuk\/20090430\/1241097617\">Rails\u3067model\u3092\u66f4\u65b0\u3059\u308b\u524d\u306b\u5909\u66f4\u5185\u5bb9\u3092\u77e5\u308b\u65b9\u6cd5 - \u533b\u8005\u3092\u5fd7\u3059\u59bb\u3092\u5fdc\u63f4\u3059\u308b\u592b\u306e\u65e5\u8a18<\/a><\/p>\n<p><a href=\"http:\/\/api.rubyonrails.org\/classes\/ActiveRecord\/Dirty.html\">Module: ActiveRecord::Dirty<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>model.changed? \u5909\u66f4\u3055\u308c\u3066\u308b\u304b\u3069\u3046\u304b\u3002 model.changed \u5909\u66f4\u3055\u308c\u3066\u3044\u308battribute\u540d\u306e\u914d\u5217\u3002 model.changes \u5909\u66f4\u3055\u308c\u3066\u3044\u308battribute\u540d\u524d\u3068\u5024\u306e\u30cf\u30c3\u30b7\u30e5\u3002\u5024\u306f\u5909\u66f4\u524d\u66f4\u5f8c &hellip; <a href=\"https:\/\/www.pistolfly.com\/weblog\/2010\/01\/railsmodel.html\" class=\"more-link\">\u7d9a\u304d\u3092\u8aad\u3080 <span class=\"screen-reader-text\">Rails\u3067model\u3092\u66f4\u65b0\u3059\u308b\u524d\u306b\u5909\u66f4\u5185\u5bb9\u3092\u77e5\u308b\u65b9\u6cd5<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_locale":"","_original_post":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[31],"tags":[],"class_list":["post-988","post","type-post","status-publish","format-standard","hentry","category-ruby-on-rails","ja"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - 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