Get latest MongoDB record by field of datetime

问题

I have a collection like this:

{
    'datetime': some-date,
    'lat': '32.00',
    'lon': '74.00'
},
{
    'datetime': some-date,
    'lat': '32.00',
    'lon': '74.00'
}

How can I get the latest record from MongoDB, where the datetime is the latest one? I want only a single record.

回答1:

Use sort and limit:

db.col.find().sort({"datetime": -1}).limit(1)

回答2:

For node.js you can use the findOne() function:

db.collection('yourCollectionName').findOne(
  {},
  { sort: { datetime: -1 } },
  (err, data) => {
     console.log(data);
  },
);

来源：https://stackoverflow.com/questions/21971710/get-latest-mongodb-record-by-field-of-datetime