MongoDB Ruby Driver

The officially supported Ruby driver for MongoDB.

Installation

Gem Installation
The Ruby driver is released and distributed through RubyGems and it can be installed with the following command:

gem install mongo

For a significant performance boost, you'll want to install the C-extension:

gem install bson_ext

Github Installation
For development and test environments (not recommended for production) you can also install the Ruby driver directly from source:

# clone the repository
git clone https://github.com/mongodb/mongo-ruby-driver.git
cd mongo-ruby-driver

# checkout a specific version by tag (optional)
git checkout 1.x.x

# install all development dependencies
gem install bundler
bundle install

# install the ruby driver
rake install

To be able to use the driver with Kerberos authentication enabled, install the mongo_kerberos gem and add it instead of mongo to your application:

gem install mongo_kerberos

require 'mongo_kerberos'

Usage

Here is a quick example of basic usage for the Ruby driver:

require 'mongo'
include Mongo

# connecting to the database
client = MongoClient.new # defaults to localhost:27017
db     = client['example-db']
coll   = db['example-collection']

# inserting documents
10.times { |i| coll.insert({ :count => i+1 }) }

# finding documents
puts "There are #{coll.count} total documents. Here they are:"
coll.find.each { |doc| puts doc.inspect }

# updating documents
coll.update({ :count => 5 }, { :count => 'foobar' })

# removing documents
coll.remove({ :count => 8 })
coll.remove

Wiki - Tutorials & Examples

For many more usage examples and a full tutorial, please visit our wiki.

API Reference Documentation

For API reference documentation, please visit here.

Compatibility

The MongoDB Ruby driver requires Ruby 1.8.7 or greater and is regularly tested against the platforms and environments listed below.

Ruby Platforms	Operating Systems	Architectures
MRI 1.8.7, 1.9.3, 2.0.0 JRuby 1.7.x	Windows Linux OS X	x86 x64 ARM

Support & Feedback

Support Channels

For issues, questions or feedback related to the Ruby driver, please look into our support channels. Please do not email any of the Ruby developers directly with issues or questions. You'll get a quicker answer on the mongodb-user list Google Group.

Bugs & Feature Requests

Do you have a bug to report or a feature request to make?

1. Visit our issue tracker and login (or create an account if necessary).
2. Navigate to the RUBY project.
3. Click 'Create Issue' and fill out all the applicable form fields.

When reporting an issue, please keep in mind that all information in JIRA for all driver projects (ex. RUBY, CSHARP, JAVA) and the Core Server (ex. SERVER) project is PUBLICLY visible.

HOW TO ASK FOR HELP

Providing enough information so we can reproduce the issue immediately will reduce roundtrip communications and get you a useful response as quickly as possible. That said, please provide the following information when logging an issue:

1. Environment
2. Ruby version, including patch-level
3. MongoDB version
4. A test case or code snippets
5. Stack traces and log data, keeping in mind that this info is public

PLEASE DO NOT

• Provide any sensitive data or server logs.
• Report potential security issues publicly (see 'Security Issues').

EXAMPLE BUG REPORT

Example taken from RUBY-775

There appears to be a recursive locking condition in the replica set connection pooling.

Environment: AWS Linux 3.10.37-47.135.amzn1.x86_64 / jruby-1.7.12 / JDK java-1.7.0-openjdk-1.7.0.55-2.4.7.1.40.amzn1.x86_64

Component: Connection Pooling / Replica set

Here is a stack trace:
https://gist.githubusercontent.com/cheald/5ed01172c5b2c9943c87/raw/63075158dac4c78c1775cac8bf84ba3b6537bc1e/gistfile1.txt

The original lock occurs [here](https://github.com/mongodb/mongo-ruby-driver/blob/1.x-stable/lib/mongo/connection/pool_manager.rb#L60)

and then the process of reconnecting ends up attempting to resynchronize the same lock [here](https://github.com/mongodb/mongo-ruby-driver/blob/1.x-stable/lib/mongo/connection/pool_manager.rb#L150)

Security Issues

If you’ve identified a potential security related issue in a driver or any other MongoDB project, please report it by following the instructions here.

Release History

Full release notes and release history are available here.

License

Copyright (C) 2009-2013 MongoDB, Inc.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.