{"published":"2018-02-13 07:00:00","author_name":"yanterakun","categories":["ruby"],"height":"190","version":"1.0","blog_url":"https://yanterakun.hatenablog.com/","type":"rich","blog_title":"\u4e0b\u7d1a\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u7db4","provider_url":"https://hatena.blog","image_url":null,"author_url":"https://blog.hatena.ne.jp/yanterakun/","width":"100%","description":"count\u3092\u4f7f\u308f\u306a\u304f\u3066\u5931\u6557\u3057\u305f\u306e\u3067\u6212\u3081\u3092\u542b\u3081\u30e1\u30e2\u3002 Active Record\u306e\u30c7\u30fc\u30bf(\u914d\u5217)\u306b\u5bfe\u3057\u3066 size\u3092\u4f7f\u3048\u3070\u914d\u5217\u3092\u5168\u3066\u30aa\u30f3\u30e1\u30e2\u30ea\u3067\u6271\u3063\u3066\u3001\u7d50\u679c\u3092\u8fd4\u3059\u3002 count\u306f\u3092\u4f7f\u3048\u3070db\u306b\u6295\u3052\u3066\u7d50\u679c\u3092\u8fd4\u3057\u3066\u304f\u308c\u308b\u3002 \u2191\u306e\u3053\u3068\u306f\u308f\u304b\u3063\u3066\u3044\u305f\u3051\u3069\u3001\u7269\u7406\u7684\u306a\u90e8\u5206\u3092\u7406\u89e3\u3057\u3066\u3044\u308b\u3064\u3082\u308a\u3067\u7d42\u308f\u3063\u3066\u3044\u305f\u3002 \u4f8b\u3048\u3070\u3001100\u4ef6\u7a0b\u5ea6\u306e\u30c7\u30fc\u30bf\u306a\u3089size\u306e\u65b9\u304c\u826f\u3044\u3068\u601d\u3046\u304c\u3001\u6570\u5341\u4e07\u4ef6\u3068\u306a\u308b\u3068count\u306e\u65b9\u304c\u826f\u3044\u3068\u601d\u3046\u3002 \u7406\u7531\u3068\u3057\u3066\u306f \u6570\u5341\u4e07\u4ef6\u306e\u30c7\u30fc\u30bf\u3092\u5168\u3066\u30e1\u30e2\u30ea\u306b\u8f09\u305b\u3088\u3046\u3068\u3059\u308b\u3068\u304a\u305d\u3089\u304f\u30e1\u30e2\u30ea\u304c\u8db3\u308a\u305a\u306b\u843d\u3061\u308b \u304b\u3089\u3067\u3042\u308b\u3002 blank?\u3068\u304bpresent?\u3068\u304b\u3082\u540c\u3058\u3053\u3068\u304c\u8a00\u3048\u308b\u3002 \u914d\u5217\u3092\u5224\u5b9a\u3059\u308b\u6642\u306b\u5024\u304c\u5b58\u5728\u3059\u308b\u3001\u5b58\u2026","provider_name":"Hatena Blog","title":"ruby\u306ecount\u306b\u3064\u3044\u3066\u30e1\u30e2","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyanterakun.hatenablog.com%2Fentry%2F2018%2F02%2F13%2F070000\" title=\"ruby\u306ecount\u306b\u3064\u3044\u3066\u30e1\u30e2 - \u4e0b\u7d1a\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u7db4\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://yanterakun.hatenablog.com/entry/2018/02/13/070000"}