{"provider_url":"https://hatena.blog","url":"https://blog.ingage.jp/entry/2026/01/22/170214","blog_title":"\u30a4\u30f3\u30b2\u30fc\u30b8\u958b\u767a\u8005\u30d6\u30ed\u30b0","version":"1.0","image_url":null,"title":"\u65e5\u5225\u30fb\u6708\u5225\u96c6\u8a08\u30921\u884c\u3067\u5b9f\u73fe\u3059\u308b\u300cgroupdate\u300d","author_url":"https://blog.hatena.ne.jp/tsuka05/","width":"100%","categories":[],"blog_url":"https://blog.ingage.jp/","height":"190","author_name":"tsuka05","description":"\u3053\u3093\u306b\u3061\u306f\u3002tsuka05\u3067\u3059\u3002 Rails\u3067\u300c\u65e5\u5225\u306e\u58f2\u4e0a\u63a8\u79fb\u300d\u3084\u300c\u6708\u5225\u306e\u65b0\u898f\u30e6\u30fc\u30b6\u30fc\u6570\u300d\u3092\u30b0\u30e9\u30d5\u5316\u3057\u3088\u3046\u3068\u3057\u305f\u3068\u304d\u3001\u3061\u3087\u3063\u3068\u9762\u5012\u306a\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002 \u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3060\u3068\u304b\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u3060\u3068\u304b\u3001\u30c7\u30fc\u30bf\u306e\u306a\u3044\u65e5\u306e\u6271\u3044\u3068\u304b\u2026 \u305d\u3093\u306a\u6642\u306b\u4fbf\u5229\u306a\u306e\u304c groupdate \u3067\u3059\u3002 \u5c0e\u5165\u65b9\u6cd5\u306f\u3001Gemfile\u306b\u8ffd\u8a18\u3057\u3066 bundle install \u3059\u308b\u3060\u3051\u3067\u3059\u3002 gem 'groupdate' \u65e5\u5225\u3067\u96c6\u8a08\u3057\u305f\u3044\u5834\u5408\u306f group_by_day \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002 User.group_by_day(:created_at).count # \u7d50\u679c\uff08\u30cf\u30c3\u30b7\u30e5\u3067\u8fd4\u3063\u3066\u304d\u307e\u3059\uff09 # {Tue, 1 Jan 20\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.ingage.jp%2Fentry%2F2026%2F01%2F22%2F170214\" title=\"\u65e5\u5225\u30fb\u6708\u5225\u96c6\u8a08\u30921\u884c\u3067\u5b9f\u73fe\u3059\u308b\u300cgroupdate\u300d - \u30a4\u30f3\u30b2\u30fc\u30b8\u958b\u767a\u8005\u30d6\u30ed\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2026-01-22 17:02:14","provider_name":"Hatena Blog","type":"rich"}