acts_as_taggable + has_many_polymorphs

以前にちらっと実験してみてたけど、has_many_polymorphsの本家で似たようなことを紹介してた。

The acts_as_taggable plugin, although built in to Rails, is basically deprecated. And the gem version is old and requires a separate join table for every taggable model, which is silly.

But those who flow with the waters of the trout shall persevere, because has_many_polymorphs makes an excellent replacement.

growing up your acts_as_taggable « snax

こっちはActiveRecord::Baseを直接拡張したりしてるみたい。