yo.rb

def following_by_type(followable_type, options={})
  follows = followable_type.constantize.
    includes(:followings).
    where(
      "follows.follower_id = ? AND follows.follower_type = ? AND follows.followable_type = ? AND blocked = ?", 
      self.id, parent_class_name(self), followable_type, false
    )
  if options.has_key?(:limit)
    return follows.limit(options[:limit])
  end
  follows
end