I am currently putting together a Seaside website for my radio show. I am trying to figure out how to model the "has and belongs to many" relationships. 

Each episode can have many tracks, each of these tracks can belong to several episodes.

I want to be able to present a listing of which episodes each track appears in, and a listing of tracks for each episode.

The approach I have seen on this is to create an intermediary object and store a set of ids on this, but this seems a little clunky, and it seems like there would be a clean way to do this.

Am I missing something?

Thanks!