Node.js MongoDB Sorting

Node.js MongoDB Sorting

In MongoDB, the sort() method is used to arrange query results either in ascending or descending order. This method accepts a parameter that defines the sorting order for the fields you want to sort by.

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To sort documents in ascending order, use:

{ name: 1 }

To sort documents in descending order, use:

{ name: -1 }

Sort in Ascending Order

Let’s sort records in ascending order based on the name field.

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Create a JavaScript file named sortasc.js with the following code:

var http = require('http');  
var MongoClient = require('mongodb').MongoClient;  
var url = "mongodb://localhost:27017/MongoDatabase";  

MongoClient.connect(url, function(err, db) {  
  if (err) throw err;  
  var mysort = { name: 1 };  
  db.collection("employees").find().sort(mysort).toArray(function(err, result) {  
    if (err) throw err;  
    console.log(result);  
    db.close();  
  });  
});  

Now open your command terminal and run the file using:

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node sortasc.js

This will display all employee records sorted alphabetically (A–Z) by name.

Sort in Descending Order

Next, let’s sort the records in descending order according to the name field.

Create a JavaScript file named sortdsc.js and add the following code:

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var http = require('http');  
var MongoClient = require('mongodb').MongoClient;  
var url = "mongodb://localhost:27017/MongoDatabase";  

MongoClient.connect(url, function(err, db) {  
  if (err) throw err;  
  var mysort = { name: -1 };  
  db.collection("employees").find().sort(mysort).toArray(function(err, result) {  
    if (err) throw err;  
    console.log(result);  
    db.close();  
  });  
});  

Run the file in the command terminal using:

node sortdsc.js

This will return all employee records sorted in reverse alphabetical order (Z–A) by name.

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