Trying to get an value from a DataMapper join table and association

Question

I have 3 classes - Mix, MixClip, and Clip.

class Mix

  include DataMapper::Resource

  property :id, Serial
  # <removed other code for brevity>

  has n, :mix_clips
  has n, :clips, :through => :mix_clips

end

class MixClip
  include DataMapper::Resource

  property :id, Serial
  property :order, Integer      

  belongs_to :mix
  belongs_to :clip
end

class Clip
  include DataMapper::Resource

  property :id, Serial
  property :title,            String    
  property :description,      Text

  has n, :mix_clips
  has n, :mixes, :through => :mix_clips
end

MixClip joins the Mix/Clip tables and includes an extra property to describe the clip (order). I would like to know if it's possible to have a clip object and be able to reference the current clip in the context it was loaded in.

So let's say I load a Mix and a Clip like so:

mix = Mix.first
clip = mix.clips.first

Is there a way to get the MixClip that is associated with that specific Clip?

clip.mix_clip.order

It was loaded through join between the table, so I would think there would be a way to do it.

I know I can just get all the mix->mix->clips-> and and drill down, but was wondering if I would be able to go back up levels... it would be simpler.

For those wondering, I'm trying to use this because dm-serializer doesn't have full support for nested associations when returning json/xml and I'd like to be able to just define a method that returns the data.

Thanks.