{"categories":["ActiveRecord"],"title":"\u5f15\u6570\u306b\u542b\u307e\u306a\u3044\u30ec\u30b3\u30fc\u30c9\u3092\u8fd4\u3059","published":"2014-03-23 16:19:07","blog_title":"\u30c4\u30e6\u30c0\u30af\u306e\u8089\u5897\u3057\u306eRuby on Rails\u306e\u521d\u5fc3\u8005\u3067","blog_url":"https://jiikko.hatenadiary.org/","type":"rich","height":"190","description":"Lokka\u306eactiverecord\u30d6\u30e9\u30f3\u30c1(\u6b21\u671fmaster)\u306b without_self\u3068\u3044\u3046scope\u304c\u3042\u3063\u305f\u3093\u3060\u3051\u3069\u3001postgresql\u3058\u3083\u52d5\u304b\u306a\u304b\u3063\u305f\u3002 scope :without_self, ->(id){ self.where('id IS NOT ?', id) } \u3053\u308c\u3067\u52d5\u3044\u305f\u3002 scope :without_self, ->(id){ self.where(\"id not in (?)\", id) } Rails4\u304b\u3089\u306fRelation#not\u304c\u3042\u3063\u3066\u3001\u5b8c\u5168\u306b\u30e9\u30c3\u30d4\u30f3\u30b0\u3057\u3066\u304f\u308c\u308b\u306e\u3067\u3053\u3046\u3044\u3046\u4e8b\u6545\u304c\u8d77\u304d\u306a\u3044\u3068\u601d\u3046\u3002 http://tech.actindi.net/3595\u2026","width":"100%","author_url":"https://blog.hatena.ne.jp/jiikko/","provider_url":"https://hatena.blog","image_url":null,"url":"https://jiikko.hatenadiary.org/entry/20140323/1395559147","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fjiikko.hatenadiary.org%2Fentry%2F20140323%2F1395559147\" title=\"\u5f15\u6570\u306b\u542b\u307e\u306a\u3044\u30ec\u30b3\u30fc\u30c9\u3092\u8fd4\u3059 - \u30c4\u30e6\u30c0\u30af\u306e\u8089\u5897\u3057\u306eRuby on Rails\u306e\u521d\u5fc3\u8005\u3067\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_name":"jiikko","version":"1.0","provider_name":"Hatena Blog"}