Add NewRelic execution traces to Mongoid

collection.rb

if defined? ::NewRelic
  module Mongoid
    class Collection
      (%w(find find_one map_reduce) + Collections::Operations::PROXIED - ['<<']).uniq.each do |method|
        add_method_tracer method, "MongoDB/\#{@klass}##{method}"
      end
    end
  end
end