RoR: Check boxes in form_for for has_many, :through with a Join model?

There is a Railscast on HABTM checkboxes -- it's an oldie but goodie. I'm pretty sure it should still work even with a join model.

If only all of life's problems could be solved by Ryan Bates's Railscasts... that would be the life. Thanks; this is exactly what I needed! – neezer Nov 16 '09 at 16:36.

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