$in - Amazon DocumentDB (original) (raw)

The $in operator in Amazon DocumentDB is a logical query operator that allows you to find documents where the value of a field equals any of the values specified in an array.

Parameters

• field: The field to check against the provided array.
• [value1, value2, ...]: An array of values to match against the specified field.

Dollar ($) in field names

See Dollar($) and dot(.) in field names for limitations regarding querying $ prefixed fields in $in in nested objects.

Example (MongoDB Shell)

The following example demonstrates how to use the $in operator to find documents where the color field is one of the values in the provided array.

Create sample documents

db.colors.insertMany([
  { "_id": 1, "color": "red" },
  { "_id": 2, "color": "green" },
  { "_id": 3, "color": "blue" },
  { "_id": 4, "color": "yellow" },
  { "_id": 5, "color": "purple" }
])

Query example

db.colors.find({ "color": { "$in": ["red", "blue", "purple"] } })

Output

{ "_id": 1, "color": "red" },
{ "_id": 3, "color": "blue" },
{ "_id": 5, "color": "purple" }

Code examples

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

Node.js

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

async function findByIn() {
  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('colors');

  const result = await collection.find({ "color": { "$in": ["red", "blue", "purple"] } }).toArray();
  console.log(result);

  await client.close();
}

findByIn();

Python

from pymongo import MongoClient

def find_by_in():
    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.colors

    result = list(collection.find({ "color": { "$in": ["red", "blue", "purple"] } }))
    print(result)

    client.close()

find_by_in()