Node.js 如何在mongoDB中对文档进行排序？

我有一个像下面这样的收藏

{
  _id: ObjectId('1asad23dsa45'),
  name: 'demo',
  addedOn: 1550228980162, // this is timestamp
},
{
  _id: ObjectId('12das34fda6'),
  name: 'demo2',
  addedOn: 1550228980156, // this is timestamp
},
{
  _id: ObjectId('12asd34fs6dfa'),
  name: 'demo3',
  addedOn: 1550228980160, // this is timestamp
}

我想更新所有文档，以便所有文档都按时间戳键排序

因此，更新后的文档可能如下所示

{
  _id: ObjectId('1asad23dsa45'),
  name: 'demo',
  addedOn: 1550228980162, // this is timestamp
},
{
  _id: ObjectId('12asd34fs6dfa'),
  name: 'demo3',
  addedOn: 1550228980160, // this is timestamp
},
{
  _id: ObjectId('12das34fda6'),
  name: 'demo2',
  addedOn: 1550228980156, // this is timestamp
}

---

没有办法做你要求的事。您无法保证写入数据时更新的顺序

但是，在读取数据和准备查询时，始终可以使用

//Sort by descending
db.Collection.find().sort( { addedOn: -1 } )

//Sort by ascending
db.Collection.find().sort( { addedOn: 1 } )