Squash Client Library: Ruby on Rails

This client library reports exceptions to Squash, the Squarish exception reporting and management system. It's compatible with both pure-Ruby and Ruby on Rails projects.

Comprehensive documentation is written in YARD- and Markdown-formatted comments throughout the source. To view this documentation as an HTML site, run rake doc.

For an overview of the various components of Squash, see the website documentation at https://github.com/SquareSquash/web.

This library is compatible with Ruby 1.8.6 and later, including Ruby Enterprise Edition, and with Rails 2.0 and later.

The only dependency is the squash_ruby gem and its dependencies. For more information, consult the squash_ruby gem documentation: https://github.com/SquareSquash/ruby

Add this gem and the Squash Ruby gem to your Gemfile:

gem 'squash_ruby', :require => 'squash/ruby'
gem 'squash_rails', :require => 'squash/rails'

See the squash_ruby gem for configuration instructions. Note that it is no longer necessary to set the :environment configuration option; the Rails client library automatically sets that to the Rails environment.

You can use the usual Squash::Ruby.notify method in your Rails projects, but you will miss out on some Rails-specific information in your exception logs. You can automatically have the Squash client send along request and Rails information by using the client's around_filter:

class ApplicationController < ActionController::Base
  include Squash::Ruby::ControllerMethods
  enable_squash_client
end

Now any exception raised in the course of processing a request will be annotated with Rails specific information. The exception is then re-raised for normal Rails exception handling.

There may be situations where other parts of the code "eat up" an exception before it reaches this filter; the most common example would be exceptions that are handled by a rescue_from statement elsewhere in your controller. You can use the {Squash::Ruby::ControllerMethods#notify_squash} method to still send these exceptions to Squash:

class ApplicationController < ActionController::Base
  include Squash::Ruby::ControllerMethods
  rescue_from(ActiveRecord::RecordInvalid) do |error|
    notify_squash error
    render :file => "public/422.html", :status => :unprocessable_entity
  end
end

Important note: Some versions of Rails (below 3.0) do not automatically run the rails/init.rb within the gem. You will need to call require 'squash/rails/configure' in a config/initializers file in order to apply the Rails configuration defaults. You'll also need to add load 'squash/rails/tasks.rake' to your Rakefile.

There are many additional features you can take advantage of; see Additional Features in the squash_ruby documentation.

By default, notify_squash uses the filtered parameter list generated according to your config.filter_parameters setting. If you need to further filter your request parameters, or if you are storing sensitive information in your session, headers, or other fields transmitted to Squash, override the {Squash::Ruby::ControllerMethods#filter_for_squash} method in your controller.

Squash works best when you notify it if your web app's deploys. If you're using Capistrano, this is easy. For Capistrano 2, just add require 'squash/rails/capistrano2' to your config/deploy.rb file. Everything else should be taken care of. For Capistrano 3, just add require 'squash/rails/capistrano3' to your Capfile.

If you do not deploy to a live Git directory, you will need to write a REVISION file to your app root. To do this, include the following in your config/deploy.rb file in Capistrano 2 or 3:

before 'deploy:compile_assets', 'squash:write_revision'

or in Capistrano 2:

before 'deploy:assets:precompile', 'squash:write_revision'

If you're not using Capistrano, you will need to configure your deploy script so that it runs the squash:notify Rake task on every deploy target. This Rake task requires two environment variables to be set: REVISION (the current revision of the source code) and DEPLOY_ENV (the environment this server is hosting).

The Squash Rails gem adds the following configuration options:

• deploy_path: The path to post new deploys to. By default it's set to /api/1.0/deploy.