How can I find records by “count” of association using rails and mongoid?

Question

With these models:

class Week
  has_many :proofs
end
class Proof
  belongs_to :week
end

I want to do something like:

Week.where         


        

Answer 1

Pardon me if I'm way off - but would you be able to use a simple counter_cache in the weeks table? Then you could do something like week.proofs_count.