discourse/app/serializers/topic_link_serializer.rb

class TopicLinkSerializer < ApplicationSerializer

  attributes :url, :title, :internal, :reflection, :clicks, :user_id

  def url
    object['url']
  end

  def title
    object['title']
  end

  def internal
    object['internal'] == 't'
  end

  def reflection
    object['reflection'] == 't'
  end

  def clicks
    object['clicks'] || 0
  end

  def user_id
    object['user_id'].to_i
  end
  def include_user_id?
    object['user_id'].present?
  end

end