为mongoose架构中数组中的嵌套对象设置默认值

const mongoose = require('mongoose');

const schema = new mongoose.Schema({
  nestedArray: {
    type: [{
      nestedField: {
        type: String,
        default: 'default value'
      }
    }],
    default: []
  }
});

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

const doc = new Model();
console.log(doc.nestedArray); // 输出: []

const doc = new Model({ nestedArray: [{ nestedField: 'custom value' }] });
console.log(doc.nestedArray); // 输出: [{ nestedField: 'custom value' }]