Services or capabilities described in AWS documentation might vary by Region. To see the differences applicable to the AWS European Sovereign Cloud Region, see the AWS European Sovereign Cloud User Guide.$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
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()