使用mongoose Node Js对来自不同集合的字段进行排序

npm install mongoose

const mongoose = require('mongoose');

mongoose.connect('mongodb://localhost/mydatabase', { useNewUrlParser: true, useUnifiedTopology: true });

const collection1Schema = new mongoose.Schema({
  field: String
});

const collection2Schema = new mongoose.Schema({
  field: String
});

const Collection1 = mongoose.model('Collection1', collection1Schema);
const Collection2 = mongoose.model('Collection2', collection2Schema);

Collection1.find().sort({ field: 1 }).exec((err, result1) => {
  if (err) {
    console.error(err);
    return;
  }

  Collection2.find().sort({ field: -1 }).exec((err, result2) => {
    if (err) {
      console.error(err);
      return;
    }

    // 处理排序后的结果
    console.log('Collection1:', result1);
    console.log('Collection2:', result2);
  });
});