{"height":"190","description":"ActiveRecord N+1\u554f\u984c\u306e\u89e3\u6c7a\uff1aincludes\u30fbpreload\u30fbeager_load\u307e\u3068\u3081 N+1\u554f\u984c\u3068\u306f \u95a2\u9023\u3092\u6301\u3064\u30ec\u30b3\u30fc\u30c9\u3092\u30eb\u30fc\u30d7\u3067\u53d6\u5f97\u3059\u308b\u3068\u304d\u30011\u56de\u306e\u4e00\u89a7\u53d6\u5f97 + N\u4ef6\u5206\u306e\u95a2\u9023\u53d6\u5f97 = N+1\u56de\u306eSQL\u304c\u767a\u751f\u3059\u308b\u554f\u984c\u3067\u3059\u3002 posts = Post.all # SELECT * FROM posts \uff081\u56de\uff09 posts.each do |post| puts post.user.name # SELECT * FROM users WHERE id = ? \uff08N\u30ec\u30b3\u30fc\u30c9\u5206\uff09 end \u6295\u7a3f\u304c100\u4ef6\u3042\u308c\u3070101\u56de\u306eSQL\u304c\u8d70\u308a\u307e\u3059\u3002 includes\uff1a\u901a\u5e38\u306f\u3053\u308c\u3092\u4f7f\u3046 in\u2026","provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/plarail_hangout/","width":"100%","categories":["Ruby","Rails"],"image_url":null,"blog_url":"https://tech.fun-toy-life.com/","blog_title":"Engineering Tech Dojo","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftech.fun-toy-life.com%2Fentry%2F2026%2F06%2F11%2F174942\" title=\"ActiveRecord N+1\u554f\u984c\u306e\u89e3\u6c7a\uff1aincludes\u30fbpreload\u30fbeager_load\u307e\u3068\u3081 - Engineering Tech Dojo\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","title":"ActiveRecord N+1\u554f\u984c\u306e\u89e3\u6c7a\uff1aincludes\u30fbpreload\u30fbeager_load\u307e\u3068\u3081","url":"https://tech.fun-toy-life.com/entry/2026/06/11/174942","author_name":"plarail_hangout","type":"rich","version":"1.0","published":"2026-06-11 17:49:42"}