Facebook Messenger API：发送结构化消息

Question

当关注this example时。

messageData = {
"attachment": {
  "type": "template",
  "payload": {
    "template_type": "generic",
    "elements": [{
      "title": "First card",
      "subtitle": "Element #1 of an hscroll",
      "image_url": "http://messengerdemo.parseapp.com/img/rift.png",
      "buttons": [{
        "type": "web_url",
        "url": "https://www.messenger.com/",
        "title": "Web url"
      }, {
        "type": "postback",
        "title": "Postback",
        "payload": "Payload for first element in a generic bubble",
      }],
    },{
      "title": "Second card",
      "subtitle": "Element #2 of an hscroll",
      "image_url": "http://messengerdemo.parseapp.com/img/gearvr.png",
      "buttons": [{
        "type": "postback",
        "title": "Postback",
        "payload": "Payload for second element in a generic bubble",
      }],
    }]
  }
}

我收到以下错误：

\"error\":{\"message\":\"(#100) 不完整的元素数据：标题和至少一个其他字段（图片url、副标题或按钮）需要非空值\" ,\"type\":\"OAuthException\",\"code\":100,\"fbtrace_id\":\"ElbXaF25+0G\"}

我错过了什么吗？在我看来，所有相关字段都存在。

Answer 1

是的，发送前需要转换成json格式，要么是结构化消息，要么是文本消息。

Answer 2

想通了，用 ruby​​ 写了这个，我需要在发送之前在哈希上调用to_json。