{"blog_title":"ma2\u2019s diary","url":"https://ma2.hatenadiary.com/entry/20060202/p2","description":"\u30fd( \u30fb\u2200\u30fb)\u30ce\u304d\u3085\u307e\u304d\u3085\u307e\u30fc\u3055\u3093\u306e\u3068\u3053\u308d\u306bRails\u306eActiveRecord\uff08O/R\u30de\u30c3\u30d1\u30fc\uff09\u3067\u591a\u5bfe\u591a\u306e\u95a2\u4fc2\u3092\u6271\u3046habtm\uff08has_and_belongs_to_many\uff09\u5c5e\u6027\u306e\u89e3\u8aac\u304c\uff01 \u7d20\u6674\u3089\u3057\u3059\u304e\u307e\u3059\u3002\u3044\u307ehabtm\u3092\u4f7f\u304a\u3046\u304b\u95a2\u9023\u7528\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u631f\u3093\u3060has_many\u306b\u3057\u3088\u3046\u304b\u3088\u304f\u5206\u304b\u3089\u306a\u304f\u3066\u60a9\u3093\u3067\u3044\u305f\u306e\u3067\u5927\u5909\u53c2\u8003\u306b\u306a\u308a\u307e\u3059\u3002","author_url":"https://blog.hatena.ne.jp/ma2/","provider_name":"Hatena Blog","image_url":null,"type":"rich","blog_url":"https://ma2.hatenadiary.com/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fma2.hatenadiary.com%2Fentry%2F20060202%2Fp2\" title=\"\u306f\u3073\u305f\u3080\u301c - ma2\u2019s diary\" 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","author_name":"ma2","title":"\u306f\u3073\u305f\u3080\u301c","height":"190","published":"2006-02-02 00:00:01","categories":["rails"],"width":"100%","version":"1.0"}