Rails在视图中呈现JSON

Question

我在我的rails应用程序中尝试渲染特定字段时遇到了麻烦，我的结构是这样的：

Home_controller.rb

  def index
    taobao_hash = OpenTaobao.get(
      :method => "taobao.tbk.item.get",
      :fields => "num_iid,title,nick,pict_url,cid,price,type,delist_time,post_fee,score,volume",
      :q => "snus",
      :page_size => 1,
      :sort => "_des",
    )

    h = JSON.parse(taobao_hash.to_json)
    render json: h["tbk_item_get_response"]
  end

这如何像json一样呈现我的整个请求

{
  "results": {
    "n_tbk_item": [
      {
        "nick": "恶毒对于",
        "num_iid": 17707525948,
        "pict_url": "http://img4.tbcdn.cn/tfscom/i2/TB1umhOHVXXXXa0aXXXXXXXXXXX_!!0-item_pic.jpg",
        "title": "瑞典戒烟产品唇烟嚼烟经典款General Classic White Portion Snus",
        "volume": 127
      }
    ]
  },
  "total_results": 99,
  "request_id": "1476rjvn5sc2g"
}

我如何仅在我的视图中呈现title？我似乎只能呈现一切。