Node.js “类型”的无效使用；“未定义”；作为Firestore的论点

我在执行代码时出错。下面的代码用于在CloudFireStore中创建集合，在此之前，我没有在CloudFireStore中创建任何集合。它是空的。在console.log中，我得到了正确的json对象

 createEntry(subjectId: string, questionnaire: string, callback: (err: any, response: any) => void) :void {
    let testEntity: TestEntity = new TestEntity(subjectId, questionnaire);
    console.log("testEntity.toJSON();----------->",testEntity.toJSON());
    var docRef = this.dbManager.collection('testQuestion').doc(subjectId);
var setAlan = docRef.set(testEntity.toJSON());
}

这里TestEntity是json值，如下所示。所有字段都有值

 createEntry(subjectId: string, questionnaire: string, callback: (err: any, response: any) => void) :void {
    let testEntity: TestEntity = new TestEntity(subjectId, questionnaire);
    console.log("testEntity.toJSON();----------->",testEntity.toJSON());
    var docRef = this.dbManager.collection('testQuestion').doc(subjectId);
var setAlan = docRef.set(testEntity.toJSON());
}

public toJSON(): testEntry {
    let returnJSON = {
        "entry_id": this.entry_id,
        "subject_id": this.subject_id,
        "entry_date": this.entry_date,
        "questionnaire": this.questionnaire,
        "entry_start_timestamp": this.entry_start_timestamp,
        "entry_end_timestamp": this.entry_end_timestamp,
        "entry_complete": this.entry_complete,
        "responses": this.responses,
        "last_answered_question" : this.last_answered_question,
        "entry_status" : this.entry_status
    }

    return returnJSON;
}

dbManager是this.adminInstance：

 createEntry(subjectId: string, questionnaire: string, callback: (err: any, response: any) => void) :void {
    let testEntity: TestEntity = new TestEntity(subjectId, questionnaire);
    console.log("testEntity.toJSON();----------->",testEntity.toJSON());
    var docRef = this.dbManager.collection('testQuestion').doc(subjectId);
var setAlan = docRef.set(testEntity.toJSON());
}

export class DatabaseManager{
    private static adminInstance:any;

    static getAdminInstance(): any {
    if(!this.adminInstance)
        admin.initializeApp(functions.config().firebase);
    this.adminInstance   =   admin;
    return this.adminInstance.firestore();
    }
}

我正在犯错误。如何解决

 createEntry(subjectId: string, questionnaire: string, callback: (err: any, response: any) => void) :void {
    let testEntity: TestEntity = new TestEntity(subjectId, questionnaire);
    console.log("testEntity.toJSON();----------->",testEntity.toJSON());
    var docRef = this.dbManager.collection('testQuestion').doc(subjectId);
var setAlan = docRef.set(testEntity.toJSON());
}

Error: Invalid use of type "undefined" as a Firestore argument.

   at Object.exports.customObjectError.val [as customObjectError] (/user_code/node_modules/firebase-admin/node_modules/@google-cloud/firestore/src/validate.js:164:14)
    at Function.encodeValue (/user_code/node_modules/firebase-admin/node_modules/@google-cloud/firestore/src/document.js:813:20)
    at Function.encodeFields (/user_code/node_modules/firebase-admin/node_modules/@google-cloud/firestore/src/document.js:683:36)
    at Function.fromObject (/user_code/node_modules/firebase-admin/node_modules/@google-cloud/firestore/src/document.js:223:55)
    at WriteBatch.set (/user_code/node_modules/firebase-admin/node_modules/@google-cloud/firestore/src/write-batch.js:301:39)
    at DocumentReference.set (/user_code/node_modules/firebase-admin/node_modules/@google-cloud/firestore/src/reference.js:420:8)
    at testEntryService.createEntry (/user_code/services/test-entry-service.js:19:30)
    at /user_code/services/intentService.js:22:36
    at Function.<anonymous> (/user_code/node_modules/actions-on-google/dist/service/dialogflow/dialogflow.js:146:23)
    at next (native)

错误：将类型“undefined”用作Firestore参数无效。
在Object.exports.customObjectError.val[作为customObjectError]（/user_code/node_modules/firebase admin/node_modules/@google cloud/firestore/src/validate.js:164:14）
在Function.encodeValue（/user\u code/node\u modules/firebase admin/node\u modules/@google cloud/firestore/src/document.js:813:20）
在Function.encodeFields（/user\u code/node\u modules/firebase admin/node\u modules/@google cloud/firestore/src/document.js:683:36）
位于Function.fromObject（/user\u code/node\u modules/firebase admin/node\u modules/@google cloud/firestore/src/document.js:223:55）
在WriteBatch.set（/user\u code/node\u modules/firebase admin/node\u modules/@google cloud/firestore/src/write batch.js:301:39）
在DocumentReference.set（/user\u code/node\u modules/firebase admin/node\u modules/@google cloud/firestore/src/reference.js:420:8）
在testEntryService.createEntry（/user\u code/services/test entry service.js:19:30）
at/user_code/services/intentService.js:22:36
在功能上。（/user\u code/node\u modules/actions on google/dist/service/dialogflow/dialogflow.js:146:23）
在下一个（本地）

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由于我是Firebase的新手，因此无法识别此错误。问题的根本原因是什么？

可能重复的请查看以下QO问题a和答案：您是否可以编辑该问题以准确显示您试图在调用set（）时放入文档的值？让setAlan=docRef.set({'entry_id'：'7cf93279-de0f-497d-a789-0ae12804c19c'，'subject_id'：subject'，'entry_date'：'2018-06-15'，'investment'：1'，'entry_start_timestamp'：'2018-06-15T11:38:57.030Z'，'entry_end_timestamp'：'2018-06-15T11:38:57.030Z'，'entry_complete'：false，“最后一个问题已回答”：0，“条目状态”：“活动”}）；

 createEntry(subjectId: string, questionnaire: string, callback: (err: any, response: any) => void) :void {
    let testEntity: TestEntity = new TestEntity(subjectId, questionnaire);
    console.log("testEntity.toJSON();----------->",testEntity.toJSON());
    var docRef = this.dbManager.collection('testQuestion').doc(subjectId);
var setAlan = docRef.set(testEntity.toJSON());
}