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(PDF).
$toUUID
New from version 8.0.1.
The $toUUID operator in Amazon DocumentDB converts a string value to a UUID (Binary subtype 4).
Parameters
Example (MongoDB Shell)
The following example shows how to use the $toUUID operator to convert string values to UUID format.
Create sample documents
db.records.insertMany([
{_id: 1, uuidStr: "550e8400-e29b-41d4-a716-446655440000"},
{_id: 2, uuidStr: "6ba7b810-9dad-11d1-80b4-00c04fd430c8"}
]);
Query example
db.records.aggregate([
{ $project: { uuid: { $toUUID: "$uuidStr" } } }
]);
Output
[
{_id: 1, uuid: UUID("550e8400-e29b-41d4-a716-446655440000")},
{_id: 2, uuid: UUID("6ba7b810-9dad-11d1-80b4-00c04fd430c8")}
]
Code examples
To view a code example for using the $toUUID operator, choose the tab for the language that you want to use:
- Node.js
-
const { MongoClient } = require('mongodb');
async function example() {
const client = new MongoClient('mongodb://<username>:<password>@<cluster-endpoint>:27017/?tls=true&tlsCAFile=global-bundle.pem&replicaSet=rs0&readPreference=secondaryPreferred&retryWrites=false');
try {
await client.connect();
const db = client.db('test');
const collection = db.collection('records');
const result = await collection.aggregate([
{ $project: { uuid: { $toUUID: "$uuidStr" } } }
]).toArray();
console.log(result);
} finally {
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')
try:
db = client['test']
collection = db['records']
result = list(collection.aggregate([
{'$project': {'uuid': {'$toUUID': '$uuidStr'}}}
]))
print(result)
finally:
client.close()
example()