Migrate from Hoptoad to Airbrake

gistfile1.rb

# Rails 2.3.5 - 2.3.11 environment settings (config/environment.rb)
config.gem 'airbrake', :version => '2.4.11', :require => "hoptoad_notifier"

# Rails 3 - bundler Gemfile(config/Gemfile)
gem 'airbrake', '2.4.11', require => "hoptoad_notifier"

# In Hoptoad initializer (config/hoptoad.rb)
HoptoadNotifier.configure do |config|
  config.api_key = '<api key>'
  config.host = 'airbrakeapp.com'
  config.user_information = "Airbrake Error {{error_id}}"
  config.notifier_url = "http://airbrakeapp.com"
end