This Week in Rails

November 10, 2023

YJIT enabled by default, Active Model improvements and much more

Hi, it’s Wojtek. This week, the documentary movie about the origins of Ruby on Rails premiered. You can see it on the Honeypot YouTube channel. Now, let’s explore this week’s changes in the Rails codebase.

Enable YJIT by default if running Ruby 3.3+
There was many public reports of 15-25% latency improvements for Rails apps that did enable Ruby 3.2 YJIT, and in 3.3 it’s even better. Following the change, in Ruby 3.3 YJIT is paused instead of disabled by default, allowing us to enable it from an initializer.

Make the output of Active Records inspect configurable.
One can use attributes_for_inspect method:

Post.attributes_for_inspect = [:id, :title]
Post.first.inspect #=> "#<Post id: 1, title: "Hello, World!">"

With the attributes_for_inspect set to :all, all record’s attributes will be listed (default for development and test environment). One can also call full_inspect to get an inspection with all the attributes.

Port type_for_attribute to Active Model
Port the type_for_attribute method to Active Model. Classes that include ActiveModel::Attributes will now provide this method, which behaves the same as it does for Active Record.

Port BeforeTypeCast module to Active Model
Classes that include ActiveModel::Attributes will now automatically define methods such as *_before_type_cast, *_for_database, etc, which behave the same as they do for Active Record.

In Action Mailer previews, list inline attachments separately from normal attachments
Attachments that were previously listed like “Attachments: logo.png file.pdf” will now be listed like “Attachments: file.pdf (Inline: logo.png)”.

In Action Mailer previews, show date from Date header if present
Falls back to current time when the header is not present (as it was before).

In Action Mailer previews, only show SMTP envelope recipient when relevant
Show SMTP-To if it differs from the union of To, Cc and Bcc.

Fix using Action Text Javascript in Sprockets
Compile ESM package that can be used directly in the browser as actiontext.esm.js.

Preload Selenium driver_path before parallelizing system tests
Fixes a race condition that could cause a “Text file busy - chromedriver” error with parallel system tests.

Fix detecting changes on Active Model for infinity
Attribute with Float::INFINITY value from now is not marked as changed when reassigning it to the same value.

Fix Active Record queries for serialized values
Fixes queries like where(field: values) when field is a serialized attribute or a JSON column).

You can view the whole list of changes here.
We had 32 contributors to the Rails codebase this past week!

Until next time!

About This Week in Rails

Your weekly inside scoop of interesting commits, pull requests and more from Rails.