来自 tooledo API 2.0 的 Ruby Sinatra 和 JSON 对象

Question

我在接收 JSON 对象时遇到了一个小问题。我正在使用 Ruby 1.9.3，我的目标是通过RestClient 从 API 接收我的任务，并将它们或多或少漂亮地打印到页面上。

我创建了一条路线/test：

get '/test' do
   json_ip_url = "http://api.toodledo.com/2/tasks/get.php?key=198196ae24792467eec09ac2191*****;modafter=1234567890;fields=folder,star,priority"
   ip_details = RestClient.get(json_ip_url)
   test = JSON.pretty_generate(ip_details) # => throws exception
end

JSON#pretty_generate 行抛出错误，“只允许生成 JSON 对象或数组”。我在这里做错了什么？

更新：

我现在可以通过 pretty_generate 进行输出，但我必须做什么才能获得其中的元素。这是 JSON 数据，在我看来它是一个包含对象的数组？

[{"num":"18","total":"18"},{"id":"11980343","title":"Add some items to your todo list","modified":1391670256,"completed":0,"folder":"0","star":"0"},{"id":"11980345","title":"Visit the Settings section and configure your account","modified":1391670256,"completed":0,"folder":"0","star":"0"},{"id":"11980347","title":"Watch our tutorial videos in the Help section","modified":1391670256,"completed":0,"folder":"0","star":"1"},{"id":"12607789","title":"test","modified":1392285802,"completed":0,"folder":"0","star":"0"},{"id":"12636039","title":"My Task","modified":1392308705,"completed":0,"folder":"0","star":"0"},{"id":"12636041","title":"Another","modified":1392308705,"completed":0,"folder":"0","star":"1"},{"id":"12636143","title":"My Task","modified":1392308789,"completed":0,"folder":"0","star":"0"},{"id":"12636145","title":"Another","modified":1392308789,"completed":0,"folder":"0","star":"1"},{"id":"12636449","title":"My Task","modified":1392308950,"completed":0,"folder":"0","star":"0"},{"id":"12636451","title":"Another","modified":1392308950,"completed":0,"folder":"0","star":"1"},{"id":"12636621","title":"My Task","modified":1392309061,"completed":0,"folder":"0","star":"0"},{"id":"12636623","title":"Another","modified":1392309061,"completed":0,"folder":"0","star":"1"},{"id":"12636665","title":"My Task","modified":1392309085,"completed":0,"folder":"0","star":"0"},{"id":"12636667","title":"Another","modified":1392309085,"completed":0,"folder":"0","star":"1"},{"id":"12636733","title":"My Task","modified":1392309137,"completed":0,"folder":"0","star":"0"},{"id":"12636735","title":"Another","modified":1392309137,"completed":0,"folder":"0","star":"1"},{"id":"12637135","title":"My Task","modified":1392309501,"completed":0,"folder":"0","star":"0"},{"id":"12637137","title":"Another","modified":1392309501,"completed":0,"folder":"0","star":"1"}]

我用于 pretty_generate 的代码：

     get '/save' do
   jdata = params[:data]
   response = RestClient.get 'http://api.toodledo.com/2/tasks/get.php?key=da21e24e2a00ba9d45008974aed00***;modafter=1234567890;fields=folder,star,priority', {:accept => :json}
    test = JSON.parse(response)
    test.to_json
     output = JSON.pretty_generate(test)
    puts output

Answer 1

RestClient#get 在没有块的情况下以字符串（而不是哈希或数组）的形式返回原始响应，因此ip_details 不是JSON#pretty_generate 知道如何处理的结构。您需要先使用JSON#parse 将响应转换为哈希或数组。