Quick statistics on collections often need grouping, counting, and sorting. Enumerable#count_by combines them for flexible Ruby-based frequency counts beyond database columns.

Network-dependent tests can avoid real HTTP by stubbing remote responses and asserting requests with WebMock, including query strings and bodies for GET and POST.

Duration#ago and Duration#from_now return ActiveSupport::TimeWithZone, which can introduce unexpected timezone behavior when an app assumes local or timezone-unaware dates.

Sidekiq needs a Redis connection configured separately for client and server environments. A REDIS_URL constant and startup load path keep staging, production, and test settings consistent.

Social network previews often pick the wrong title, image and description unless OpenGraph meta tags provide them; Facebook caches previews and may need manual refresh.

pg_restore --clean removes data from dumped tables but leaves extra tables in place, which can break later migrations when restoring a staging dump locally.

Katapult 0.4.0 adds application-model associations and can generate a project README for Rails-style project scaffolding.

quiet_assets suppresses noisy asset pipeline messages in development logs, reducing clutter while keeping them available when needed.

Custom exception classes in Ruby can be defined with Class.new(StandardError) and referenced as namespaced constants.

Hoptoad has been renamed to Airbrake after a trademark dispute over frog- and toad-related names.

Now allows to list transition paths from and to arbitrary states.

How to write to the db 27,000 times in 24 seconds instead of 9 minutes.

Sometimes, you just need to shoot from the hip…or deploy your local changes without committing them. Put this snippet from Jesse Newland in ~/.caprc and now you can cap cowboy deploy.

When rendering a partial with the :collection option, you are automatically provided with a counter variable inside the partial template.

Terminus is a Capybara driver where most of the driver functions are implemented in client-side JavaScript. It lets you script any browser on any machine using the Capybara API, without any browser plugins or extensions.

You can now add an :inverse_of option to has_one, has_many and belongs_to associations.... Without :inverse_of m and f.man would be different instances of the same object (f.man being pulled from the database again). With these new :inverse_of options m and f.man are the same in memory instance.

Capistrano task for Bundler.

Try our Apify gem which solves many problems you will be having.

Cerberus is a lightweight and easy-to-use Continuous Builder software for Ruby. It could be run periodically from a scheduler and check if application tests are broken. In case of failed tests Cerberus sends notification to developers.

Consent is an access control abstraction layer for ActionController. It lets you restrict access to actions across your application using a single config file, rather than scattering access logic across your controllers using verify() and method-specific logic.

LaterDude is a small calendar helper with i18n support

A while back, I had a requirement to persist a record of which email addresses were sent an email through the system. I expected to find callback support for ActionMailer, but was surprised to find that it didn't exist.

Squirrel is an enhancement for ActiveRecord’s find method that allows programmers to query the database using a more Rubyish syntax.

Web 2.0 sites have lots of tiny javascript/css files, which causes one extra round trip per file to the server and back! This is bad! Bundle-fu throws it all up into a big package and sends it out all at once.