{"description":"\u305f\u3076\u3093PrimaryKey\u3058\u3083\u306a\u3044\u30ab\u30e9\u30e0\u3067\u7d10\u4ed8\u3051\u3042\u3063\u3066\u3044\u308b\u30c6\u30fc\u30d6\u30eb\u3060\u3068belongs_to\u3068\u304b\u3067Association\u3092\u5b9a\u7fa9\u3067\u304d\u306a\u3044\uff1f\u6c17\u304c\u3057\u3066\u3044\u307e\u3059\u3002\u8a66\u3057\u3066\u3044\u306a\u3044\u3093\u3067\u3059\u3051\u3069\u3002 \u305d\u3093\u306a\u3068\u304d\u306b\u7d50\u5408\u3057\u305f\u30c6\u30fc\u30d6\u30eb\u306e\u30ab\u30e9\u30e0\u3092\u89e6\u308a\u305f\u3044\u5834\u5408\u306e\u3084\u308a\u65b9\u30922\u901a\u308a\u3002 \u30bf\u30fc\u30b2\u30c3\u30c8\u306b\u306a\u308b\u30c6\u30fc\u30d6\u30eb\u306eActiveRecord::Relation\u3092\u53d6\u5f97\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u4f5c\u308b joins\u306f\u666e\u901a\u306b\u66f8\u3044\u3066\u3001select\u306b\u5bfe\u8c61\u30c6\u30fc\u30d6\u30eb\u540d\u4ed8\u304d\u3067\u30ab\u30e9\u30e0\u540d\u3092\u6307\u5b9a\u3059\u308b \u30bf\u30fc\u30b2\u30c3\u30c8\u306b\u306a\u308b\u30c6\u30fc\u30d6\u30eb\u306eActiveRecord::Relation\u3092\u53d6\u5f97\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u4f5c\u308b class Employee def job_history JobHistory\u2026","blog_title":"\u306a\u3093\u3067\u3084\u3002\u3002","url":"https://fwl.hateblo.jp/entry/2013/07/14/000324","width":"100%","title":"Association\u306f\u66f8\u3051\u306a\u3044\u3093\u3060\u3051\u3069INNER JOIN\u3057\u305f\u30c6\u30fc\u30d6\u30eb\u306e\u30ab\u30e9\u30e0\u3092\u53c2\u7167\u3057\u305f\u3044\u3093\u3067\u3059","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ffwl.hateblo.jp%2Fentry%2F2013%2F07%2F14%2F000324\" title=\"Association\u306f\u66f8\u3051\u306a\u3044\u3093\u3060\u3051\u3069INNER JOIN\u3057\u305f\u30c6\u30fc\u30d6\u30eb\u306e\u30ab\u30e9\u30e0\u3092\u53c2\u7167\u3057\u305f\u3044\u3093\u3067\u3059 - \u306a\u3093\u3067\u3084\u3002\u3002\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","type":"rich","height":"190","author_name":"yoshi-13","author_url":"https://blog.hatena.ne.jp/yoshi-13/","provider_name":"Hatena Blog","categories":["active record"],"version":"1.0","published":"2013-07-14 00:03:24","image_url":null,"blog_url":"https://fwl.hateblo.jp/"}