{"url":"https://ayaketan.hatenablog.com/entry/2013/11/13/141853","provider_url":"https://hatena.blog","title":"Rails4 pluck\u3067\u5fc5\u8981\u306a\u30ab\u30e9\u30e0\u306e\u5024\u3092\u914d\u5217\u3067\u53d6\u5f97\u3059\u308b","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fayaketan.hatenablog.com%2Fentry%2F2013%2F11%2F13%2F141853\" title=\"Rails4 pluck\u3067\u5fc5\u8981\u306a\u30ab\u30e9\u30e0\u306e\u5024\u3092\u914d\u5217\u3067\u53d6\u5f97\u3059\u308b - ayaketan\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u52c9\u5f37\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","version":"1.0","categories":["Ruby"],"height":"190","width":"100%","author_name":"ayaketan","blog_url":"https://ayaketan.hatenablog.com/","author_url":"https://blog.hatena.ne.jp/ayaketan/","type":"rich","published":"2013-11-13 14:18:53","blog_title":"ayaketan\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u52c9\u5f37\u65e5\u8a18","provider_name":"Hatena Blog","description":"\u4ee5\u524d\u3001\u5fc5\u8981\u306a\u30ab\u30e9\u30e0\u306e\u5024\u3092\u914d\u5217\u3067\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u3092\u4e0b\u8a18\u306e\u8a18\u4e8b\u3067\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002 \u5fc5\u8981\u306a\u30ab\u30e9\u30e0\u306e\u5024\u3092\u914d\u5217\u3067\u53d6\u5f97\u3059\u308b\u65b9\u6cd5 - ayaketan\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u52c9\u5f37\u65e5\u8a18\u3057\u304b\u3057\u3001\u3082\u3063\u3068\u30b9\u30de\u30fc\u30c8\u306a\u65b9\u6cd5\u304c\u3042\u308b\u3053\u3068\u3092\u77e5\u308a\u307e\u3057\u305f\u3002 \u3057\u304b\u3082\u3001\u305d\u306e\u65b9\u6cd5\u3060\u3068\u5fc5\u8981\u306a\u8907\u6570\u306e\u30ab\u30e9\u30e0\u306e\u5024\u3092\u914d\u5217\u3067\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u524d\u306e\u66f8\u304d\u65b9 User.select(:id).where(:group_id => 2).map(&:id) pluck\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408 User.where(:group_id => 2).pluck(:id) \u3055\u3089\u306b\u3001\u8907\u6570\u306e\u30ab\u30e9\u30e0\u306e\u5024\u3092\u53d6\u5f97\u3059\u308b\u5834\u5408 User.where(:group_id => 2).pluck\u2026"}