{"provider_url":"https://hatena.blog","author_name":"na_ah","image_url":null,"height":"190","categories":[],"type":"rich","provider_name":"Hatena Blog","url":"https://na-ah.hatenablog.com/entry/2024/01/30/223705","author_url":"https://blog.hatena.ne.jp/na_ah/","blog_title":"na_ah\u306e\u30d6\u30ed\u30b0","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fna-ah.hatenablog.com%2Fentry%2F2024%2F01%2F30%2F223705\" title=\"Rails\u3067\u30ec\u30b3\u30fc\u30c9\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u308a\u51fa\u3059\u65b9\u6cd5 - na_ah\u306e\u30d6\u30ed\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2024-01-30 22:37:05","version":"1.0","description":"\u3053\u3093\u306b\u3061\u306f\uff01 \u4eca\u56de\u306fRails\u3067\u30ec\u30b3\u30fc\u30c9\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u308a\u51fa\u3059\u65b9\u6cd5\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3059\u3002 \u30af\u30e9\u30b9\u30e1\u30bd\u30c3\u30c9 find\u30e1\u30bd\u30c3\u30c9 member = Member.find(3) id\u3067\u30ec\u30b3\u30fc\u30c9\u3092\u53d6\u308a\u51fa\u3059\uff08id\u30ab\u30e9\u30e0\u304b\u3089\u691c\u7d22\uff09 \u5b58\u5728\u3057\u306a\u3044id\u3092\u6307\u5b9a\u3059\u308b\u3068\u4f8b\u5916\u304c\u767a\u751f\u3059\u308b find_by\u30e1\u30bd\u30c3\u30c9 member = Member.find_by(name: \"Taro\") \u6307\u5b9a\u3057\u305f\u30ab\u30e9\u30e0\u304b\u3089\u6700\u521d\u306b\u4e00\u81f4\u3057\u305f\u30ec\u30b3\u30fc\u30c9\u3092\u53d6\u308a\u51fa\u3059 \u4e00\u81f4\u3059\u308b\u30ec\u30b3\u30fc\u30c9\u304c\u306a\u3044\u5834\u5408\u306f\u3001nil\u304c\u8fd4\u308b \u30af\u30a8\u30ea\u2015\u30e1\u30bd\u30c3\u30c9 \u691c\u7d22\u6761\u4ef6\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u8a18\u8ff0\u3059\u308b\u305f\u3081\u306e\u3082\u306e ActiveRecord::Relation\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30aa\u30d6\u30b8\u30a7\u2026","title":"Rails\u3067\u30ec\u30b3\u30fc\u30c9\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u308a\u51fa\u3059\u65b9\u6cd5","blog_url":"https://na-ah.hatenablog.com/","width":"100%"}