如何在mongoose中获取全部文档？

const mongoose = require('mongoose');

// 连接数据库
mongoose.connect('mongodb://localhost/mydatabase', { useNewUrlParser: true, useUnifiedTopology: true });

// 定义文档模型
const Schema = mongoose.Schema;
const mySchema = new Schema({
  name: String,
  age: Number
});
const MyModel = mongoose.model('MyModel', mySchema);

// 获取全部文档
MyModel.find({}, (err, documents) => {
  if (err) {
    console.error(err);
  } else {
    console.log(documents);
  }
});