Exception Notification Gem and Rails 3

Question

I\'m trying to get this up and running, but I see \"uninitialized constant ExceptionNotifier\" whenever I start my server.

http://github.com/rails/exception_notificatio

Answer 1

All previous answers are outdated, you can now simply add this to your gemfile:

gem 'exception_notification', :require => 'exception_notifier'

And edit your production.rb config file as indicated in the readme:

config.middleware.use ExceptionNotifier,
  :email_prefix => "[Exception] ",
  :sender_address => %{"Exception Notifier" <support@example.com>},
  :exception_recipients => %w{you@me.com}

Answer 2

If you are doing a rescue_from Exception, with: :render_500 to handle showing a 500 template/page it no longer sends an email with just this

    config.middleware.use ExceptionNotifier,
  :email_prefix => "[some prefix] ",
  :sender_address => %{"Notifier" <notify@domain.com>},
  :exception_recipients => %w{recipient@domain.com}

You'll need to manually send it in the method that handles the exception

def render_500(exception)
    # email an error email if there's a 500 in production mode
    if Rails.env.production?
        ExceptionNotifier::Notifier.exception_notification(request.env, exception).deliver
    end
end 

So put the config stuff in your environment (production.rb) and the Exception handling code in your application controller.

Answer 3

I had the same problem just now and resolved it this way:

Gemfile

source 'http://rubygems.org'
gem 'exception_notification_rails3', :require => 'exception_notifier'

application.rb

config.middleware.use ExceptionNotifier,
  :email_prefix => "[some prefix] ",
  :sender_address => %{"Notifier" <notify@domain.com>},
  :exception_recipients => %w{recipient@domain.com}

I'm refactoring a Rails 2.3 project to 3.0, so I haven't tried this on a fresh install.

Edit:

It might actually be better (or "more correct") to put the ExceptionNotifier initialization in a separate initializer file in config/initializers/ instead of application.rb.

config/initializers/exception_notifier.rb

MyApp::Application.config.middleware.use ExceptionNotifier,
  :email_prefix => "[some prefix] ",
  :sender_address => %{"Notifier" <notify@domain.com>},
  :exception_recipients => %w{recipient@domain.com}

Answer 4

Latest version of official gem works with Rails 3, you can find it here: https://github.com/smartinez87/exception_notification.

Next gem release will make the :require => 'exception_notifier' option unnecessary.

Answer 5

Actually, now, it is much easier. In your Gemfile you need to write:

gem "exception_notification", :git => "http://github.com/rails/exception_notification.git", :require => 'exception_notifier'

And all should be fixed. The :require option is crucial (i guess because the names differ you have to specify explicitly). All other patches mentioned before have been merged i presume.

Answer 6

It took a bit of work but I got Exception Notifier working with Rails 3.0.0:

1- rails plugin install http://github.com/sickill/exception_notification.git

(If you don't want to use this fork, just apply his patch manually to the original Rails plugin: it is only 3 lines.) It fixes the 'undefined method controller_name error'

2- In application.rb:

config.middleware.use "::ExceptionNotifier" , :email_prefix => "[Whatever] ",
                           :sender_address => %{"notifier" <notifier@example.com>},
                           :exception_recipients => %w{whoever@example.com} 

3- Apply Lawrence Pit's patch. (UPDATE: This link appears to be broken) It fixes the uninitialized constant ActiveRecord::RecordNotFound error as documented here.

That's it.