AWS documentdb documentation change
Summary
Entire file removed (documentation for the $ projection operator in MongoDB).
Security assessment
Removal of documentation for a MongoDB operator without any security context. Likely part of documentation reorganization or removal of outdated content. No evidence of security vulnerability or security feature documentation.
Diff
diff --git a/documentdb/latest/developerguide/dollar-projection.md b/documentdb/latest/developerguide/dollar-projection.md index dd9a548f5..8b1378917 100644 --- a//documentdb/latest/developerguide/dollar-projection.md +++ b//documentdb/latest/developerguide/dollar-projection.md @@ -1 +0,0 @@ -[](/pdfs/documentdb/latest/developerguide/developerguide.pdf#dollar-projection "Open PDF") @@ -3,113 +1,0 @@ -[Documentation](/index.html)[Amazon DocumentDB](/documentdb/index.html)[Developer Guide](what-is.html) - -Example (MongoDB Shell)Code examples - -# $ - -The `$` projection operator limits the contents of an array field to return only the first element that matches the query condition. It is used to project a single matching array element. - -**Parameters** - - * `field.$`: The array field with the positional operator to project the first matching element. - - - - -## Example (MongoDB Shell) - -The following example demonstrates using the `$` projection operator to return only the matching array element. - -**Create sample documents** - - - db.students.insertMany([ - { _id: 1, name: "Alice", grades: [85, 92, 78, 95] }, - { _id: 2, name: "Bob", grades: [70, 88, 92, 65] }, - { _id: 3, name: "Charlie", grades: [95, 89, 91, 88] } - ]); - -**Query example** - - - db.students.find( - { grades: { $gte: 90 } }, - { name: 1, "grades.$": 1 } - ); - -**Output** - - - { "_id" : 1, "name" : "Alice", "grades" : [ 92 ] } - { "_id" : 2, "name" : "Bob", "grades" : [ 92 ] } - { "_id" : 3, "name" : "Charlie", "grades" : [ 95 ] } - -In this example, only the first grade that is greater than or equal to 90 is returned for each student. - -## Code examples - -To view a code example for using the `$` projection operator, 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('students'); - - const result = await collection.find( - { grades: { $gte: 90 } }, - { projection: { name: 1, "grades.$": 1 } } - ).toArray(); - - console.log(JSON.stringify(result, null, 2)); - 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['students'] - - result = list(collection.find( - {'grades': {'$gte': 90}}, - {'name': 1, 'grades.$': 1} - )) - - print(result) - client.close() - - example() - - **Javascript is disabled or is unavailable in your browser.** - -To use the Amazon Web Services Documentation, Javascript must be enabled. Please refer to your browser's Help pages for instructions. - -[Document Conventions](/general/latest/gr/docconventions.html) - -Query and projection operators - -$all - -Did this page help you? - Yes - -Thanks for letting us know we're doing a good job! - -If you've got a moment, please tell us what we did right so we can do more of it. - -Did this page help you? - No - -Thanks for letting us know this page needs work. We're sorry we let you down. - -If you've got a moment, please tell us how we can make the documentation better.