node.js – (node：3341)DeprecationWarning：Mongoose：mpromise

我是triyng使用我的自定义方法在mongoose的顶部开发一个类，所以我扩展了mongoose与我自己的类，但当我调用创建一个新的汽车方法，它的工作，但它的地带和错误，在这里我让你看到什么我想做。

我收到这个警告

(node:3341) DeprecationWarning: Mongoose: mpromise (mongoose's default promise library) is deprecated,plug in your own promise library instead: http://mongoosejs.com/docs/promises.html

后我做

driver.createCar({
      carName: 'jeep',availableSeats: 4,},callBACk);

driver是Driver类的一个实例

const carscheR_823_11845@a = new scheR_823_11845@a({
  carName: String,availableSeats: number,createdOn: { type: Date,default: Date.Now },});
const driverscheR_823_11845@a = new scheR_823_11845@a({
 email: String,name: String,city: String,phonenumber: String,cars: [carscheR_823_11845@a],userId: {
   type: scheR_823_11845@a.Types.ObjectId,required: true,});
const DriverModel = mongoose.model('Driver',driverscheR_823_11845@a);

class Driver extends DriverModel {
  getCurrentDate() {
  return moment().format();
}
create(cb) {
  // save driver
  this.createdOn = this.getCurrentDate();
  this.save(cb);
}
remove(cb) {
  super.remove({
  _id: this._id,cb);
}
createCar(carData,cb) {
  this.cars.push(carData);
  this.save(cb);
}
getCars() {
  return this.cars;
 }
}

任何想法，我做错了什么？