如何填充Mongooese数组中的字段？

npm install mongoose

const mongoose = require('mongoose');

const userSchema = new mongoose.Schema({
  name: String,
  skills: [String]
});

const User = mongoose.model('User', userSchema);

User.findById(userId, (err, user) => {
  if (err) {
    console.error(err);
    return;
  }

  user.skills.push('New Skill');
  user.save((err) => {
    if (err) {
      console.error(err);
      return;
    }

    console.log('Array field updated successfully.');
  });
});