Ryan Williams

Exception Notification in Rails 3

One thing I liked about Django was the email notification it sends when an exception occurs on the server. Ruby on Rails has a plugin called Exception Notification which does the same thing.

The installation instructions in the README file aren’t really complete. So here’s how to get it up and running in Rails 3.

Edit your Gemfile and add the following line

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

Then run bundle to install it.

Once that’s done you need to create a file named config/initializers/exception_notification.rb and populate it with:

YourAppName::Application.config.middleware.use ExceptionNotifier,
  :email_prefix => "[ERROR] ",
  :sender_address => '"Notifier" <notifier@yourdomain.com>',
  :exception_recipients => ['exceptions@yourdomain.com']

From then on you will receive an email to exceptions@yourdomain.com that contains a tonne of information to help you diagnose what caused the error.

Comments

oh really, i was searching the instruction to install Rain3….. it really works.

your post is just what i was looking for. thanks a billion for sharing. now i would easily be doing my project. thanks again.

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Thanks Ryan! The line :require => “exception_notifier” was important!!

I couldn’t figure out for the longest time why my app was giving error about “uninitialized constant ExceptionNotifier”
Now I realize the gem directory is exception_notification, thus the need to specify this :require line in the Gemfile

Thanks for your help.