{"blog_url":"https://h365info.hatenablog.com/","description":"Rails4 \u3067 group by \u3057\u3066 count \u3092\u53d6\u308a\u305f\u3044\u6642\u306b\u3053\u3093\u306a\u3075\u3046\u306b\u66f8\u3051\u307e\u3059\u3002 \u672c\u306b\u5bfe\u3057\u3066\u30ec\u30d3\u30e5\u30fc\u304c\u66f8\u304b\u308c\u3066\u3044\u3066\u3001\u672c\u3054\u3068\u306e\u30ec\u30d3\u30e5\u30fc\u4ef6\u6570\u3092\u53d6\u308a\u305f\u3044\u5834\u5408\u306f Review.group(:book_id).order('count_all desc').count \u3053\u3093\u306a\u3075\u3046\u306b\u66f8\u304f\u3068 (0.3ms) SELECT COUNT(*) AS count_all, book_id AS book_id FROM `reviews` GROUP BY book_id ORDER BY count_all desc => {588=>5, 589=>2, 590=>1, 591=>0, 592=>4\u2026","provider_name":"Hatena Blog","version":"1.0","type":"rich","height":"190","author_url":"https://blog.hatena.ne.jp/h365info/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fh365info.hatenablog.com%2Fentry%2F2014%2F02%2F05%2F174950\" title=\"Rails \u3067 group by \u3057\u3066 count \u3092\u53d6\u308a\u305f\u3044\u6642\u306e\u30a4\u30c7\u30a3\u30aa\u30e0 - h365info&#39;s blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":null,"title":"Rails \u3067 group by \u3057\u3066 count \u3092\u53d6\u308a\u305f\u3044\u6642\u306e\u30a4\u30c7\u30a3\u30aa\u30e0","url":"https://h365info.hatenablog.com/entry/2014/02/05/174950","categories":["h365","\u30a2\u30c0\u30eb\u30c8","Rails"],"published":"2014-02-05 17:49:50","width":"100%","blog_title":"h365info's blog","provider_url":"https://hatena.blog","author_name":"h365info"}