{"blog_url":"https://kwatch.hatenadiary.org/","image_url":null,"description":"\u305f\u3068\u3048\u3070 Book : Author \u304c Many to Many \u306e\u95a2\u4fc2\u3060\u3063\u305f\u3068\u3059\u308b\u3002\u3053\u306e\u3068\u304d\u300cBook.first.authors\u300d\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u300cUnknown column 'author_id' in 'field list'\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u304c\u51fa\u305f\u3002 $ merb -i irb> Book.first.authors ~ SELECT `id`, `title`, `author_id` FROM `books` ORDER BY `id` LIMIT 1 ~ Unknown column 'author_id' in 'field list' (mysql_error_code=00\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkwatch.hatenadiary.org%2Fentry%2F20081215%2F1229355033\" title=\" DataMapper \u3067\u300cUnknown column &#39;XXX_id&#39; in &#39;field list&#39;\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u304c\u51fa\u305f\u3068\u304d - k\u306a\u3093\u3068\u304b\u306e\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>","width":"100%","title":" DataMapper \u3067\u300cUnknown column 'XXX_id' in 'field list'\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u304c\u51fa\u305f\u3068\u304d","author_url":"https://blog.hatena.ne.jp/kwatch/","provider_name":"Hatena Blog","url":"https://kwatch.hatenadiary.org/entry/20081215/1229355033","published":"2008-12-15 00:30:33","author_name":"kwatch","blog_title":"k\u306a\u3093\u3068\u304b\u306e\u65e5\u8a18","height":"190","type":"rich","provider_url":"https://hatena.blog","version":"1.0","categories":["merb"]}