{"height":"190","provider_name":"Hatena Blog","published":"2019-10-21 10:16:54","categories":["Ruby on Rails"],"title":"Rails CHANGELOG \"2019-10-14\"..\"2019-10-20\"","author_name":"tanaken0515","version":"1.0","type":"rich","image_url":null,"blog_title":"tanaken\u2019s blog","provider_url":"https://hatena.blog","url":"https://tanaken0515.hatenablog.com/entry/2019/10/21/101654","blog_url":"https://tanaken0515.hatenablog.com/","author_url":"https://blog.hatena.ne.jp/tanaken0515/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftanaken0515.hatenablog.com%2Fentry%2F2019%2F10%2F21%2F101654\" title=\"Rails CHANGELOG &quot;2019-10-14&quot;..&quot;2019-10-20&quot; - tanaken\u2019s blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"\u3053\u306e\u671f\u9593\u306e CHANGELOG.md \u3078\u306e\u30b3\u30df\u30c3\u30c8\u306f3\u4ef6\u3002 ActiveRecord\u306b\u95a2\u3057\u30661\u4ef6, ActiveSupport\u306b\u95a2\u3057\u30662\u4ef6\u3002 ActiveRecord MySQL\u3067 primary_key \u3092\u53d6\u5f97\u3059\u308b\u51e6\u7406\u3092\u9ad8\u901f\u5316\u3057\u305f \u30b3\u30df\u30c3\u30c8: Fixed the performance regression for `primary_keys` introduced MySQL 8.0 \u00b7 rails/rails@77f4ae0 ActiveRecord::ConnectionAdapters::AbstractMysqlAdapter#primary_keys \u306e\u4fee\u6b63\u3002 issue\u306f\u3053\u308c \u2026","width":"100%"}