{"blog_title":"chulip.org","author_url":"https://blog.hatena.ne.jp/arcright/","author_name":"arcright","version":"1.0","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fchulip.org%2Fentry%2F2017%2F05%2F19%2F161338\" title=\"Rails Migration versioning\u30685.1\u3067\u306e\u5909\u66f4\u70b9 - chulip.org\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_url":"https://chulip.org/","provider_name":"Hatena Blog","image_url":"https://images-fe.ssl-images-amazon.com/images/I/51sWgspkfML._SL160_.jpg","width":"100%","categories":["Rails"],"published":"2017-05-19 16:13:38","height":"190","title":"Rails Migration versioning\u30685.1\u3067\u306e\u5909\u66f4\u70b9","provider_url":"https://hatena.blog","type":"rich","description":"Rails 5.0\u3067\u5c0e\u5165\u3055\u308c\u305fMigration versioning\u3067\u306f\u3001Migration\u3092\u4f5c\u6210\u3059\u308b\u969b\u306bSuperClass\u306b\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u6319\u52d5\u3092\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002 Version the API presented to migration classes, so we can change parameter defaults without breaking existing migrations, or forcing them to be rewritten through a deprecation cycle. http://guides.rub\u2026","url":"https://chulip.org/entry/2017/05/19/161338"}