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

 Example:
   >> @jim.follower_of?(@ruby)
   => true
see if this model is follower of some model