如何使用Mongoose/MongoDB定义数组中的对象

npm install mongoose

const mongoose = require('mongoose');

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

const Schema = mongoose.Schema;

const objectSchema = new Schema({
  name: String,
  age: Number
});

const arraySchema = new Schema({
  objects: [objectSchema]
});

const ArrayModel = mongoose.model('ArrayModel', arraySchema);

const object1 = { name: 'John', age: 25 };
const object2 = { name: 'Jane', age: 30 };

const arrayDocument = new ArrayModel({ objects: [object1, object2] });

arrayDocument.save((err, doc) => {
  if (err) {
    console.error(err);
  } else {
    console.log(doc);
  }
});

ArrayModel.findOne({}, (err, doc) => {
  if (err) {
    console.error(err);
  } else {
    console.log(doc.objects);
  }
});