It’s almost time for RailsConf, and we’re determined to get the final version of Rails 5.2 released before then.
So here’s the hopefully last release candidate before that can happen. We’ve put a ton of into ironing out all the issues with Active Storage
in particular, now that more and more applications are starting to use it in production.
You can peruse the nearly 200 commits since the first release candidate from the beginning of the year to see everything that has been fixed.
If you’re about to start a new application, I feel confident enough in this release to recommend that you should base it off this RC2.
If you like to keep up with the latest release, now is also a great time to update your existing application.
You can read in even more detail about everything that’s new in Rails 5.2 in the newly finished release notes.
Enjoy Rails 5.2 and hope to see a good portion of everybody at RailsConf in a month or so!
Recap of the highlights of Rails 5.2 from the beta announcement
It’s been too hard to deal with file uploads in Rails for too long. Sure, there’s been a lot of fine plugins available,
but it was overdue that we incorporated something right into the framework. So now we have!
With the new Active Storage
framework in Rails 5.2, we’ve solved for the modern approach of uploading files straight to the cloud. Out of the box,
there’s support for Amazon’s S3, Google’s Cloud Storage, and Microsoft Azure Cloud File Storage.
If you’re dealing with images, you can create variants on the fly. If you’re dealing with videos or PDFs, you can create
previews on the fly. And regardless of the type, you can analyze uploads for metadata extraction asynchronously.
Active Storage was extracted from Basecamp 3 by George Claghorn and yours truly. So not only is the framework already
used in production, it was born from production. There’s that Extraction Design guarantee stamp alright!
Speaking of extractions, Jeremy Daer has untangled the long jungle twine of hacks we were using at Basecamp to employ
Redis for general partial, fragment, and other Rails caching jobs. There’s a sparkling new Redis Cache Store
that incorporates all those years of veteran hacks into a cohesive unit that anyone can use.
This new Redis Cache Store supports Redis::Distributed, for Memcached-like sharding across Redises. It’s fault tolerant,
so will treat failures like misses, rather than kill the request with an exception. It even supports distributed MGETs
for that full partial collection caching goodness.
This comes together with a massive leap forward for cache efficiency with key recycling
and compression both available by default. For Basecamp, it meant improving
the cache lifetime by two orders of magnitude! We went from having caches trashed in as little as a day to having
caches last for months. If you’re using partial caching and the nesting doll strategy, your cache lifetime will improve
dramatically between these two changes.
We’ve also embraced the cherry of HTTP/2 with early hints through the work
of Aaron Patterson and Eileen Uchitelle. This means we can automatically instruct the web server to send required style
On the topic of performance, Rails now ships with Bootsnap in the default
Gemfile, created by our friends at Shopify. It generally reduces application boot times by over 50%.
Rails has always been in the forefront of making your web applications more secure, leading the way with built-in CSRF
and XSS protection and we’ve enhanced that further in Rails 5.2 with the addition of a new DSL
that allows you to configure a Content Security Policy
for your application. You can configure a global default policy and then override it on a per-resource basis and even
use lambdas to inject per-request values into the header such as account subdomains in a multi-tenant application.
But it’s not all just new starry-eyed wonders. In Rails 5.1, we added encrypted secrets.
These secrets were like the old secrets but, uhm, more secret, because, you know, ENCRYPTION! Confusing? Yes. Why would
you want secrets that weren’t really secret? Well, you don’t.
In Rails 5.2, we’ve rectified the mess by deprecating the two different kinds of secrets and introduced a new shared
concept called Credentials. Credentials, like AWS access keys and other forms of logins and passwords, were the dominant
use case for secrets, so why not just call a spade a spade. So spade it is!
Credentials are always encrypted. This means they’re safe to check into revision control, as long as you keep the key
out of it. That means atomic deploys, no need to mess with a flurry of environment variables, and other benefits of having all
credentials that the app needs in one place, safe and secure.
In addition, we’ve opened up the API underlying Credentials, so you can easily deal with other encrypted configurations,
keys, and files.
Since Rails 5.1, we’ve also made great strides with Webpacker. So Rails 5.2 is
pre-configured build pipeline run by Webpack. We keep strengthening that relationship.