This is the official provider for the Ruby ecosystem - it also has built-in support for Rails.

Why add Raygun to my Ruby app?

Ruby is a great, flexible language that allows you to write powerful applications, whether for the web with a framework or elsewhere. All software has bugs; a good developer recognizes this and the fact that the correct tools can help minimize their effect. Specifically, the effect on his or her users. Raygun allows your app to automatically send real time error and crash reports, and place them on a dashboard, allowing you to easily diagnose and fix the issue.

Raygun4Ruby Features

This provider has first-class support for:

  1. Ruby 2.0 or greater
  2. Rails 3/4/5

It also includes a Resque failure backend, for notifying Raygun if its queue falls over.


It comes as a gem, so add this line to your application’s Gemfile’:

gem 'raygun4ruby'

And then execute:


Or install it yourself using:

gem install raygun4ruby


rails g raygun:install your_api_key

You can find your API key on your Raygun Dashboard

You can then test your Raygun integration by running:

rake raygun:test

You should see an “ItWorksException” appear in your Raygun dashboard. You’re ready to zap those errors!

Note that the generator will create a file in config/initializers called “raygun.rb”. If you need to do any further configuration or customization of Raygun, that’s the place to do it!

By default the Rails integration is set to only report Exceptions in Production. To change this behaviour, set config.enable_reporting to something else in config/initializers/raygun.rb.

Rails 2

Raygun4Ruby doesn’t currently support Rails 2. If you’d like Rails 2 support, drop us a line.


To enable exception tracking in Sinatra, just add configure Raygun and use the Rack middleware in your app:

require 'raygun4ruby'
Raygun.setup do |config|
  config.api_key = "YOUR_API_KEY_HERE"
use Raygun::Middleware::RackExceptionInterceptor

Feature Overview

Manual exception tracking

With vanilla Ruby, it’s easy as:

require 'rubygems'
require 'raygun4ruby'

Raygun.setup do |config|
  config.api_key = "YOUR_RAYGUN_API_KEY"
  config.filter_parameters = [ :password, :card_number, :cvv ] # don't forget to filter out sensitive parameters
  config.enable_reporting = true # to send errors, false to not log

  # your lovely code here
rescue Exception => e

You can also pass a Hash as the second parameter to track_exception. It should look like a Rack Env Hash

Custom User Data

Custom data can be added to track_exception by passing a custom_data key in the second parameter hash.

  # more lovely code
rescue Exception => e
  Raygun.track_exception(e, custom_data: {my: 'custom data', goes: 'here'})

This data is filtered by default using the options set in Rails.application.config.filter_parameters. To setup additional keys please see the section below titled Sensitive POST data filtering.

Ignoring Some Errors

You can ignore certain types of Exception using the ignore option in the setup block, like so:

Raygun.setup do |config|
  config.api_key = "MY_SWEET_API_KEY"
  config.ignore  << ['MyApp::AnExceptionIDontCareAbout']

The following exceptions are igonored by default:


You can see this here and unignore them if needed by doing the following:

Raygun.setup do |config|
  config.api_key = "MY_SWEET_API_KEY"

Using a Proxy

You can pass proxy settings using the proxy_settings config option.

Raygun.setup do |config|
  config.api_key = "MY_SWEET_API_KEY"
  config.proxy_settings = { host: "localhost", port: 8888 }

Sensitive POST data filtering

The provider can automatically remove data you don’t want transmitted, such as passwords or credit card info. This defaults to Rails.application.config.filter_parameters, but you can specify additional keys like this:

Raygun.setup do |config|
  config.api_key = "YOUR_RAYGUN_API_KEY"
  config.filter_parameters = [ :password, :card_number, :cvv ]

This filtering also applies to information submitted through the custom user data mentioned previously.

Customizing Parameter Filtering

If you’d like to customize how parameters are filtered, you can pass a Proc to filter_parameters. Raygun4Ruby will yield the params hash to the block, and the return value will be sent along with your error.

Raygun.setup do |config|
  config.api_key = "YOUR_RAYGUN_API_KEY"
  config.filter_parameters do |params|
    params.slice("only", "a", "few", "keys") # note that Hash#slice is in ActiveSupport

Affected User Tracking

Raygun can now track how many users have been affected by an error.

By default, Raygun looks for a method called current_user on your controller, and calls either email, username or id on the object returned by that method.

You can customize those method names in your configuration block:

Raygun.setup do |config|
  config.api_key = "MY_SWEET_API_KEY"
  config.affected_user_method = :my_current_user # `current_user` by default
  config.affected_user_identifier_methods << :login # `[ :email, :username, :id ]` by default - will use the first that works

If you’re using Rails, most authentication systems will have this method set and you should be good to go.

The count of unique affected users will appear on the error group in the Raygun dashboard. If your user has an email method, and that email has a Gravatar associated, you will also see your user’s avatar.

If you wish to keep it anonymous, you could set this identifier to something like SecureRandom.uuid and store that in a cookie, like so:

class ApplicationController < ActionController::Base
  def raygun_user
    cookies.permanent[:raygun_user_identifier] ||= SecureRandom.uuid

(Remember to set affected_user_method to :raygun_user in your config block…)

Version tracking

Raygun can attach the version of your application to its error reports. In your Raygun.setup block, set version to the current version of your app.

Raygun.setup do |config|
  config.version = "" # you could also pull this from ENV or however you want to set it.


Raygun allows you to tag error reports with any number of tags. In your Raygun.setup block, set tags to an array of strings to have those set on any error reports sent by the gem.

Raygun.setup do |config|
  config.tags = ['heroku']

Resque Error Tracking

Raygun4Ruby also includes a Resque failure backend. You should include it inside your Resque initializer (usually something like config/initializers/load_resque.rb)

require 'resque/failure/multiple'
require 'resque/failure/raygun'
require 'resque/failure/redis'

Resque::Failure::Multiple.classes = [Resque::Failure::Redis, Resque::Failure::Raygun]
Resque::Failure.backend = Resque::Failure::Multiple

Sidekiq Error Tracking

Raygun4Ruby can track errors from Sidekiq (2.x or 3+). All you need to do is add the line:

  require 'raygun/sidekiq'

Either in your Raygun initializer or wherever else takes your fancy :)

The provider is open source and available at the Raygun4Ruby repository.