$toInt

New from version 4.0

The $toInt operator in Amazon DocumentDB is used to convert an input value to an integer data type. This operator is useful when you need to ensure that a field or expression is represented as an integer, which can be important for certain operations or data processing tasks.

Parameters

• expression: The expression to be converted to an integer.

Example (MongoDB Shell)

The following example demonstrates how to use the $toInt operator to convert a string value to an integer.

Create sample documents

db.numbers.insertMany([
  { "name": "one", "value": "1" },
  { "name": "hundred", "value": "100" }
]);

Query example

db.numbers.aggregate([
  { $project: {
    "_id": 0,
    "name": 1,
    "intValue": { $toInt: "$value" }
  }}
]);

Output

{ "name": "one", "intValue": 1 }
{ "name": "hundred", "intValue": 100 }

Code examples

To view a code example for using the $toInt command, choose the tab for the language that you want to use:

Node.js

const { MongoClient } = require('mongodb');

async function example() {
  const client = await MongoClient.connect('mongodb://<username>:<password>@<cluster-endpoint>:27017/?tls=true&tlsCAFile=global-bundle.pem&replicaSet=rs0&readPreference=secondaryPreferred&retryWrites=false');
  const db = client.db('test');
  const collection = db.collection('numbers');

  const result = await collection.aggregate([
    { $project: {
      "_id": 0,
      "name": 1,
      "intValue": { $toInt: "$value" }
    }}
  ]).toArray();

  console.log(result);
  await client.close();
}

example();

Python

from pymongo import MongoClient

def example():
    client = MongoClient('mongodb://<username>:<password>@<cluster-endpoint>:27017/?tls=true&tlsCAFile=global-bundle.pem&replicaSet=rs0&readPreference=secondaryPreferred&retryWrites=false')
    db = client['test']
    collection = db['numbers']

    result = list(collection.aggregate([
        { "$project": {
            "_id": 0,
            "name": 1,
            "intValue": { "$toInt": "$value" }
        }}
    ]))

    print(result)
    client.close()

example()