{"categories":["Rails","Ruby"],"author_url":"https://blog.hatena.ne.jp/griefworker/","image_url":null,"height":"190","provider_url":"https://hatena.blog","version":"1.0","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftnakamura.hatenablog.com%2Fentry%2F2013%2F04%2F10%2F204648\" title=\"\u30e2\u30c7\u30eb\u9593\u306e\u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u306e\u60c5\u5831\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5 - present\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"\u30e2\u30c7\u30eb\u9593\u306e\u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u306e\u60c5\u5831\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5","blog_title":"present","type":"rich","author_name":"griefworker","description":"belongs_to \u3084 has_many \u3067\u5ba3\u8a00\u3057\u305f\u3001 \u30e2\u30c7\u30eb\u9593\u306e\u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u306e\u60c5\u5831\u3092\u53d6\u5f97\u3059\u308b\u306b\u306f\u3001 ActionRecord::Reflection \u306e reflect_on_all_associations \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3048\u3070\u3044\u3044\u3002 ActiveRecord::Base \u306f ActiveRecord::Reflection \u3092 include \u3057\u3066\u3044\u308b\u306e\u3067\u3001 \u30e2\u30c7\u30eb\u306e\u30af\u30e9\u30b9\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u3059\u3050\u4f7f\u3048\u308b\u3002 # \u5168\u90e8 Task.reflect_on_all_associations # belongs_to \u3060\u3051 Task.reflect_on_all_associations(:belong\u2026","url":"https://tnakamura.hatenablog.com/entry/2013/04/10/204648","width":"100%","blog_url":"https://tnakamura.hatenablog.com/","published":"2013-04-10 20:46:48"}