如何在Mongoose中验证对象数组

const mongoose = require('mongoose');

const itemSchema = new mongoose.Schema({
  name: {
    type: String,
    required: true
  },
  quantity: {
    type: Number,
    required: true
  }
});

const mySchema = new mongoose.Schema({
  items: {
    type: [itemSchema],
    required: true
  }
});

const MyModel = mongoose.model('MyModel', mySchema);

const myObject = new MyModel({
  items: [
    { name: 'Item 1', quantity: 5 },
    { name: 'Item 2', quantity: 10 }
  ]
});

myObject.validate((error) => {
  if (error) {
    console.log(error);
  } else {
    console.log('Validation passed');
  }
});

itemSchema.path('quantity').validate(function(value) {
  return value >= 0;
}, 'Quantity must be a non-negative number');

myObject.validate((error) => {
  if (error) {
    console.log(error);
  } else {
    console.log('Validation passed');
  }
});