在ExpressJS，MongoDB，Inversify.js中的DB动作回调之前获得204响应

Question

我想将新文档添加到mongodb并获得插入的ID作为201状态的响应，但是当db.insertOne调用时，在水龙头工作之前我得到204状态代码的响应。这是我的控制器

@controller('/stars')
export class StarController {

   constructor(@inject(TYPES.StarService) private starService: IStarService) {}

@httpPost('/')
public newStar(request: Request, response: Response) {
    this.starService.insert(request.body)
        .pipe(
            tap(result => response.status(201).json(result))
        ).subscribe();
}
}

在我的StarService中

@injectable()
export class StarService implements IStarService {
private mongoClient: MongoDBClient;

constructor(@inject(TYPES.MongoDBClient) mongoClient: MongoDBClient) {
    this.mongoClient = mongoClient;
}

 public insert(star) {
    return this.mongoClient.insertOne(star, 'stars');
}

在MongoDBClient中

   public insertOne<T>(document: T, collectionName: string): Observable<ObjectID> {
    return from(
        this.db.collection(collectionName).insertOne(document))
        .pipe(
            map(
                (result: InsertOneWriteOpResult) => {
                    return result.insertedId;
                }));
}

如何获取具有正确状态代码和正文的json响应