用于MediaObject的Dialogflow API V2 largeImage无法正常工作

Question

I recently switched from the V1 to V2 for dialogflow and I'm updating my webhook.

I use mediaObjects with large Images in my agent as a personal taste. Unfortunately I can't seem to make it work for the V2. My current code for the media object is this:

 conv.ask(new MediaObject({
          name: 'Name',
          largeImage: new Image({
              url: 'https://[...].jpg',
              alt: 'alternative'
          }),
          url: 'https://[...].mp3',
          description: 'description'
}));

As you can see, I used the largeImage field, as I found it in the JSON section of Google's example . As the documentation is inexistant, I'm checking the node.js library for information and I verified that the largeImage field extends the Image interface so it should be correct.

It works when I switch largeImage for Icon but I don't like it.

My JSON response is like this:

"payload": {
    "google": {
      "expectUserResponse": true,
      "richResponse": {
        "items": [
          {
            "simpleResponse": {
              "textToSpeech": "text"
            }
          },
          {
            "mediaResponse": {
              "mediaType": "AUDIO",
              "mediaObjects": [
                {
                  "contentUrl": "https://[...].mp3",
                  "description": "description",
                  "name": "name"
                }
              ]
            }
          }
        ],
        "suggestions": [
          {
            "title": "Not yet implemented"
          }
        ]
      },
      "userStorage": "{\"data\":{}}"
    }
  }

For some reason the largeImage field doesn't appear in my JSON but there isn't any error appearing anywhere.

Answer 1

Some of the APIs in JSON do not match the Node.js parameters. For example, largeImage in JSON is actually image in the MediaObjectOptions definition.