Mongoose -数组另存为字符串

const mongoose = require('mongoose');

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

// 定义虚拟属性
schema.virtual('arrayAsString').get(function() {
  return this.arrayField.join(', ');
});

const Model = mongoose.model('Model', schema);

// 使用虚拟属性
Model.findOne({ name: 'example' }, (err, doc) => {
  console.log(doc.arrayAsString); // 将数组转换为字符串并输出
});