Thank you for an advice, Jeremy.

>  Foo.def_dataset_method(:[]){|id| first(:id=>id)}
>  Foo.user(user_id)[id]

I'll try with this method.

Regards,
Shun

-----
Mellowtone Inc. - life is a melody
Shunichi Arai

http://www.mellowtone.co.jp
http://asiajin.com/blog/



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