module Bullet::ActiveRecord

def to_a

if select only one object, then the only one object has impossible to cause N+1 query.
if select a collection of objects, then these objects have possible to cause N+1 query. 
def to_a
  records = origin_to_a
  if Bullet.start?
    if records.size > 1
      Bullet::Detector::NPlusOneQuery.add_possible_objects(records)
      Bullet::Detector::CounterCache.add_possible_objects(records)
    elsif records.size == 1
      Bullet::Detector::NPlusOneQuery.add_impossible_object(records.first)
      Bullet::Detector::CounterCache.add_impossible_object(records.first)
    end
  end
  records
end