Using MongoDB with Ruby

Connecting Ruby applications to MongoDB

MongoDB can be used with Ruby applications through the official MongoDB Ruby driver. This guide covers the basics of setting up a MongoDB connection, performing CRUD operations, and using MongoDB with Ruby.

Setting Up MongoDB Ruby Driver

To get started, you need to install the MongoDB Ruby driver. You can do this using the following command:

gem install mongo

Connecting to MongoDB

Once the driver is installed, you can connect to MongoDB using the Mongo::Client class:

require 'mongo'

client = Mongo::Client.new([ '127.0.0.1:27017' ], :database => 'myDatabase')
puts "Connected to the database successfully"

Performing CRUD Operations

CRUD (Create, Read, Update, Delete) operations can be performed using the MongoDB Ruby driver. Below are examples of each operation:

Create

collection = client[:myCollection]
result = collection.insert_one({ name: 'John Doe', age: 30, city: 'New York' })
puts result.n

Read

doc = collection.find({ name: 'John Doe' }).first
puts doc

Update

result = collection.update_one({ name: 'John Doe' }, { '$set' => { age: 31 } })
puts result.n

Delete

result = collection.delete_one({ name: 'John Doe' })
puts result.n

Best Practices

When using MongoDB with Ruby, consider the following best practices:

• Use connection pooling to manage MongoDB connections efficiently.
• Handle exceptions and errors appropriately to ensure your application can recover from failures.
• Regularly monitor and optimize your queries and indexes to maintain performance.