我在TypeScript中创建了两个自定义类型。

type ResponseModel = {
    label: string;
    questions?: QuestionModel[];
    id?: string;
};

type QuestionModel = {
    label: string;
    responses?: ResponseModel[];
    id?: string;
};

字符串
从这两种类型中，我构建了一个QuestionModel JSON文件。

{
    "label": "your destination?",
    "responses": [
        {
            "label": "USA",
            "questions": [
                {
                    "label": "do you have a visa?",
                    "responses": [
                        {
                            "label": "yes"
                        },
                        {
                            "label": "no"
                        }
                    ]
                }
            ]
        },
        {
            "label": "Canada",
            "questions": [
                {
                    "label": "do you have a work licence?",
                    "responses": [
                        {
                            "label": "yes"
                        },
                        {
                            "label": "no"
                        }
                    ]
                }
            ]
        }
    ]
}

型
这只是一个小例子，文件可以比这个更长，内容也不同。
我想构建一个循环，在每个问题和每个答案上添加id，以便得到以下结果。

{
    "label": "your destination?",
    "id": "yourdestination?",
    "responses": [
        {
            "label": "USA",
            "id": "yourdestination?_USA",
            "questions": [
                {
                    "label": "do you have a visa?",
                    "id": "yourdestination?_USA_doyouhaveavisa?",
                    "responses": [
                        {
                            "label": "yes",
                            "id": "yourdestination?_USA_doyouhaveavisa?_yes"
                        },
                        {
                            "label": "no",
                            "id": "yourdestination?_USA_doyouhaveavisa?_no"
                        }
                    ]
                }
            ]
        },
        {
            "label": "Canada",
            "id": "yourdestination?_Canada",
            "questions": [
                {
                    "label": "do you have a work licence?",
                    "id": "yourdestination?_Canada_doyouhaveaworklicence?",
                    "responses": [
                        {
                            "label": "yes",
                            "id": "yourdestination?_Canada_doyouhaveaworklicence?_yes"
                        },
                        {
                            "label": "no",
                            "id": "yourdestination?_Canada_doyouhaveaworklicence?_no"
                        }
                    ]
                }
            ]
        }
    ]
}

型
我的问题是构建嵌套的id，那么我如何从头到尾按照嵌套的顺序读取对象呢？