Rails + Dialogflow无法生成履行状态

Question

我正在尝试响应对Dialogflow的简单调用。

我去了V2文档，从字面上复制了他们的示例文本，仍然遇到问题。

Here is the response documentation

我有一个DialogflowController带有创建操作：

def create
  result = ChatService.formulate_response(params)
  render json: { status: 200, data: result }, content_type: 'application/json'
end

在我的聊天服务中，我有一种可以建立响应的方法：

module ChatService
  extend self

  def formulate_response(params)
    result = params['queryResult']
    return sign_up_response if result['action'] == 'input.sign-up'
  end

private
  def sign_up_response
    {
      "fulfillmentText": "This is a text response",
      "fulfillmentMessages": [
        {
          "card": {
            "title": "card title",
            "subtitle": "card text",
            "imageUri": "https://assistant.google.com/static/images/molecule/Molecule-Formation-stop.png",
            "buttons": [
              {
                "text": "button text",
                "postback": "https://assistant.google.com/"
              }
            ]
          }
        }
      ],
      "source": "example.com",
      "payload": {
        "google": {
          "expectUserResponse": true,
          "richResponse": {
            "items": [
              {
                "simpleResponse": {
                  "textToSpeech": "this is a simple response"
                }
              }
            ]
          }
        },
        "facebook": {
          "text": "Hello, Facebook!"
        },
        "slack": {
          "text": "This is a text response for Slack."
        }
      },
      "outputContexts": [
        {
          "name": "projects/${PROJECT_ID}/agent/sessions/${SESSION_ID}/contexts/context name",
          "lifespanCount": 5,
          "parameters": {
            "param": "param value"
          }
        }
      ],
      "followupEventInput": {
        "name": "event name",
        "languageCode": "en-US",
        "parameters": {
          "param": "param value"
        }
      }
    }
  end
end

Dialogflow的履行响应正好显示了这一点，但fulfilment status显示了：

Webhook call failed. Error: Failed to parse webhook JSON response: Cannot find field: status in message google.cloud.dialogflow.v2.WebhookResponse.

我正在回应一个Facebook集成，就像一个简单的文本回复。