I have 3 models, A, B and C
and the classic 3 relations:
1) A <--- has_and_belongs_to_many ---> B

2) B has_many C

B -> c1
  -> c2
  -> c3
  ...

3) C belong_to B

C -> a1

Question:
How can I get C entries in relationship to an A entry ?

in other words, I have
a = A.find id

and I want C

I have tried
a.bs.cs (NOT correct)
A.bs.all(:include => :cs) (NOT correct)

do you have any solutions ?

thank you,
Alessandro DS
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