lib/mongoid_followable/followable.rb
def followee_of?(model)
      0 < self.followers.by_model(model).limit(1).count * model.followees.by_model(self).limit(1).count
    end
def followee_of?(model)
      0 < self.followers.by_model(model).limit(1).count * model.followees.by_model(self).limit(1).count
    end
see if this model is followee of some model

 Example:
   >> @ruby.followee_of?(@jim)
   => true