If touching production data gives you the shivers, this talk is for you. At @tropicalonrails, I shared some practical ways to make production data changes safer, calmer, and less scary: www.youtube.com/watch?v=c6l6...

Matheus Richard: Production Data Doesn't Have to Be Scary

YouTube video by Tropical on Rails

youtube.com

Are you still having fun when you code? Have you ever wanted to make a game with Ruby? @matheusrich.bsky.social is here to reignite that fire in you!

Nice addition in Rails: now when validates_uniqueness_of fails, you'll be able to access the ID of the record that caused the conflict github.com/rails/rails/...

Add conflicting record ID to `validates_uniqueness_of` error details by bvicenzo · Pull Request #55826 · rails/rails

Motivation and Background Currently, when a validates_uniqueness_of validation fails, the errors.details hash only provides { error: :taken, ... }. This indicates that a conflict exists but offers ...

github.com

Just deleted ~1.6k LOC and ~770 KB of JS by replacing a chart library (and all of its deps) with a Ruby helper that renders the charts as plain HTML/CSS. CSS Anchor Positioning made this basically JS-free.

Inspired by @nateberkopec.bsky.social, I wrote about why and how you should enable MFA for your gems! If you don't have any gems, this can be one of the easiest open-source contributions you can make! Check it out: thoughtbot.com/blog/lets-en...

Let's enable MFA for all Ruby gems

Supply chain attacks are getting more common. RubyGems might be next. Here’s how to help the ecosystem be safer.

thoughtbot.com

No one sets out to write a slow test, and yet it happens. Prevent slow tests from creeping into your test suite again! Tests are not enough, we need *fast* tests! thoughtbot.com/blog/introdu...

Introducing Test Budget: a linter for test performance

Your test suite didn’t get slow all at once. It won’t get fast all at once either. Start by making sure it stops getting worse.

thoughtbot.com

Here's one of those things that are easy to miss on code review and will make your tests super slow. Good news: it's easy to fix! thoughtbot.com/blog/combine...

Combine Capybara selectors to avoid the sequential timeout trap

How I shaved over a minute off a test suite with a one-line change.

thoughtbot.com

TIL about Rails' image_submit_tag api.rubyonrails.org/v8.1.2/class...

This was a fun one to write!

AppSignal@appsignal.com · 8mo ago

🎩 New Ruby Magic: An Introduction to Ruby Parsing with Prism blog.appsignal.com/2026/01/07/a...

Today I learned about Rails' Time.days_in_month and Time.days_in_year. So handy!

🎉 end_of_life 1.0.0.alpha is released! It includes: - Macos install via homebrew - Support for scanning EOL Node.js versions - Support for detecting versions from `mise.toml`. - A new `check` command to check if specific product releases are EOL - A revamped CLI Stay updated!

TIL about Git LFS: An open source Git extension for versioning large files git-lfs.com

Git Large File Storage

Git Large File Storage (LFS) replaces large files such as audio samples, videos, datasets, and graphics with text pointers inside Git, while storing the file contents on a remote server like GitHub.co...

git-lfs.com

Just shaved 200-250ms from a CLI app by just requiring dependencies only when they're needed. It might not seem much, but it really matters to get that snappy feel.

This is my favorite 404 page

Did you know that Rails 7.1 stops receiving security updates in 3 weeks? Wished that you had a tool that would inform you about this kind of stuff? Well, end_of_life v0.5 was just released and it now supports Rails! Check it out: github.com/MatheusRich/...

I've hacked the first version of end_of_life in a weekend. I had limited time, so I decided to only support Ruby. It served me well for years, but I thought it was time to expand support for other tools (Rails, Node, Python, databases, etc).

If you wanna use Rails 8.1 today, you can check if there's anything new in the dotfiles, Dockerfile, or the generated authentication system using rails-diff: github.com/MatheusRich/...

GitHub - MatheusRich/rails-diff: Compare Rails-generated files with the ones in your repository

Compare Rails-generated files with the ones in your repository - MatheusRich/rails-diff

github.com

The amount of event listeners LLMs suggest when writing Stimulus controllers makes me think most people are not making the most out of Stimulus targets.

TIL about the Zen browser. Looks cool! zen-browser.app

Join me at @thoughtbot.com’s Open Summit this year! I’m extremely excited to be part of this event. Even better, it’s *free* and *online*, so I hope I can see you there! timriley.info/posts/join-m...

Join me at thoughtbot’s Open Summit! - Tim Riley

I’m delighted to be joining the thoughtbot Open Summit on 31st October this year! What is Open Summit? From the announcement: “a live, interactive, hands-on day of pairing and solving open...

timriley.info

This is exciting!

André Arko@indirect.io · last yr.

what’s the name for a version-and-dependency-and-more manager like `uv`? I don’t know, but I’m building one for Ruby anyway andre.arko.net/2025/08/25/r...

I remember a time where GitHub had a team dedicated to fixing small user pain points. Now everyone complains about it being slow and adding AI features. What a change.

TIL about `ActiveRecord.to_param`. I've always defined `#to_param` manually ``` class User < ActiveRecord::Base to_param :name end user = User.find_by(name: 'Fancy Pants') user.id # => 123 user_path(user) # => "/users/123-fancy-pants" ```

I forgot to share, but about a month ago I got my first commit into Crystal! You can use this if you're on Crystal >= 1.17

How hard can extracting an emoji from a string be? Well..

thoughtbot@thoughtbot.com · last yr.

The characters you see hide a more complex reality.

Rails now has a `credentials:fetch` command. This is useful to extract a credential and add to Kamal secrets, for example: KAMAL_REGISTRY_PASSWORD=$(rails credentials:fetch kamal.registry_password) No need to use rails runner just for that anymore! github.com/rails/rails/...

Add credentials:fetch command by n-studio · Pull Request #53119 · rails/rails

Motivation / Background With Kamal 2, secrets are now stored in .kamal/secrets. We are expected to use a 3rd party password manager such as 1password to fetch secrets such as KAMAL_REGISTRY_PASSWOR...

github.com

Hey, I'm on This Week in Rails world.hey.com/this.week.in...

TIL you can download an .epub version of the Rails guides! guides.rubyonrails.org/epub/ruby_on...

Ever wondered how Ruby works under the hood? No need to take a compilers class to get that! You can watch my #RailsConf talk to understand the basics. Along the way you might even write your first programming language. www.youtube.com/watch?v=ozay...

RailsConf 2025 Ruby Internals: A Guide For Rails Developers by Matheus Richard

YouTube video by Ruby Central

youtube.com

I feel like half of my web problems would be solved if 1. styling select fields was widely available, and 2. select multiple=true had a good default experience (select on click + search + better styles)