我有一个可以引用其自身的值架构，因此它可以具有许多嵌套的值。例如，这是一个示例JSON：

{
                name: 'IPA',additional_questions: [{
                    name: 'bitterness',additional_fee: 0,additional_questions: [{
                        name: 'low',additional_fee: 0
                    },{
                        name: 'medium',additional_fee: 19
                    },{
                        name: 'high',additional_fee: 39
                    }
                    ]
                }]
            }

以下是该模型，我不确定该模型是否正确：

// Build schema for Values interface
export var ValueSchema: Schema = new Schema({
    name: { type: String,required: true },additional_fee: { type: Number },additional_questions: { type: [ValueSchema] }
})

// Build schema for Questions interface
export var QuestionsSchema: Schema = new Schema({
    question: { type: String,field: { type: String,enum: ["dropdown","checkbox","free-form","multiple-choice"],values: { type: [ValueSchema],required: true }
})

当我使用REST API创建此模型时，出现验证错误：

{
    "statusCode": 400,"body": {
        "msg": {
            "msg": null,"err": {
                "errors": {
                    "questions.0.values.6.additional_questions": {
                        "message": "Cast to Array failed for value \"[ { name: 'IPA',\n    additional_fee: 0,\n    additional_questions: [ [Object],[Object],[Object] ] } ]\" at path \"additional_questions\"","name": "CastError","stringValue": "\"[ { name: 'IPA',[Object] ] } ]\"","kind": "Array","value": [
                            {
                                "name": "IPA","additional_fee": 0,"additional_questions": [
                                    {
                                        "name": "low","additional_fee": 0
                                    },{
                                        "name": "medium","additional_fee": 19
                                    },{
                                        "name": "high","additional_fee": 39
                                    }
                                ]
                            }
                        ],"path": "additional_questions","reason": {}
                    }
                }
            }
        }
    }
}

我最终希望值模型具有尽可能多的嵌套的Additional_questions，而且我不确定是否通过引用自身正确创建了模型。有其他方法吗？