无法访问 json 文件中的部分

Question

我正在尝试检索 json 文件的自适应卡片中的选择。 所以当过敏选项'peanut'被选中时，我想把它赋值给一个变量。但是代码一直报错。

适配卡码：

{
    "type": "message",
    "speak": "...",
    "attachments": [
        {
            "contentType": "application/vnd.microsoft.card.adaptive",
            "content": {
                "type": "AdaptiveCard",
                "version": "1.0",
                "body": [
                    {
                        "type": "TextBlock",
                        "text": "Almost there...",
                        "size": "large",
                        "weight": "bolder"
                    }
                ],
                "actions": [
                    {
                        "type": "Action.ShowCard",
                        "title": "Beef",
                        "card": {
                            "type": "AdaptiveCard",
                            "body": [
                                {
                                    "type": "TextBlock",
                                    "text": "What are you allergic to?",
                                    "size": "medium",
                                    "wrap": true
                                },
                                {
                                    "type": "Input.ChoiceSet",
                                    "value": "BeefAllergy",
                                    "id": "BeefAllergy",
                                    "style": "expanded",
                                    "isMultiSelect": false,
                                    "isCompact": false,
                                    "choices": [
                                        {
                                            "title": "Peanut",
                                            "value": "peanut"
                                        },
                                        {
                                            "title": "Seafood",
                                            "value": "seafood"
                                        }
                                    ]
                                }
                            ],
                            "actions": [
                                {
                                    "type": "Action.Submit",
                                    "title": "Next",
                                    "data": {
                                        "mealOptions": "beef"
                                    }
                                }
                            ]
                        }
                    }
                ]
            }
        }
    ]
}

以下是我尝试将其存储在变量中的方法：

lunchAllergy= session.message.attachments.content.actions.card.body[1].choices[1].value
session.send(lunchallergy)

这是错误：

ERROR: Cannot read property 'actions' of undefined

Answer 1

在我对你的自适应卡片内容的测试中，实际上，当你的用户点击 Action.Submit 按钮时，你的机器人可以在 session.message.value 中获得用户选择，你可以将你想要的存储在变量。

详情请参考https://github.com/Microsoft/BotBuilder-Samples/blob/master/Node/cards-AdaptiveCards/app.js中的示例。