Refining NilClass over using try
How to resolve Errno::EMFILE when using Paperclip in Rails
Caching in Rails API and pitfalls to avoid
Using ActiveModel::Naming to retrieve more information on names of ActiveRecord models.
Using the around_save callback in ActiveRecord models for further processing
Using the Closure Table pattern for nested hierarchical data
Using ActionMailer in Rails 4.2 wth sidekiq
Using Content Security Policy in Rails
Using ActionMailer in Rails 4.2