Mongoose -如何在更新bulkOp时初始化默认字段值

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const mySchema = new Schema({
  field1: {
    type: String,
    default: 'default value for field1'
  },
  field2: {
    type: Number,
    default: 0
  },
  // 其他字段...
});

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

const operations = [
  {
    updateOne: {
      filter: { _id: 'documentId' },
      update: { $set: { field1: 'new value for field1' } },
      upsert: true
    }
  },
  // 其他操作...
];

MyModel.bulkWrite(operations)
  .then(result => {
    console.log(result);
  })
  .catch(error => {
    console.error(error);
  });