Ruby on Rails 4.2 Release Notes — Ruby on Rails Guides

Highlights in Rails 4.2: Active Job Asynchronous mails Adequate Record Web Console Foreign key support These release notes cover only the major changes. To learn about other features, bug fixes, and changes, please refer to the changelogs or check out the list of commits in the main Rails repository on GitHub. 1. Upgrading to Rails 4.2If you're upgrading an existing application, it's a great idea

[crist18]

rails update “Default Host for rails server”

[sora_h]

@asonas @yu_suke1994 キャッシュです

[yasulabs]

“Active Job is a new framework in Rails 4.2. It is an adapter layer on top of queuing systems like Resque, Delayed Job, Sidekiq, and more. You can write your jobs to Active Job, and it'll run on all these queues with no changes. (It comes pre-configured with an inline runner.)”

[sonots]

あとで読む