Facebookユーザ情報をRedisに保存してAPIリクエスト回数を減らす

  def fb_user
    begin
      cached_data = $redis.get(current_user.uid)
      return Hashie::Mash.new(JSON.parse(cached_data))
    rescue
      me              = FbGraph::User.me(decrypted_token)
      fb_user         = me.fetch
      $redis.set fb_uid, fb_user.to_json  rescue logger.error "[Redis] set #{fb_uid} failed"
      return fb_user
    end
  rescue => e
    nil
  end