Tim Tilberg retweetledi
Ruby on Rails is probably the most token-efficient way to write a real web app together with agents that doesn't immediately fall apart with security holes and unscalable decisions. rubyonrails.org
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Tim Tilberg
999 posts
Tim Tilberg
@timtilberg
A beatster from nor-easter... assuming you were in Minneapolis... And not going too far north east. I use .rb, .py and .js to power business intelligence apps.
Duluth, MN Katılım Şubat 2008
233 Takip Edilen154 Takipçiler
@jeremysmithco I’ll add, I’m using Claude code, not copilot. I don’t know if or how much that matters.
I’ve been really surprised at how good Claude is at getting going with very little info. Sticking to vanilla rails conventions feels like it may be paying dividends.
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@jeremysmithco Well, I mean files like Claude.md, agents.md, product design docs, etc. I’ve been working in a project very successfully with none of it, which contradicts common wisdom. But I’ve seen a handful of rails people describe a similar sentiment.
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I'm finding Copilot PR reviews to currently be more trouble than they're worth. Just fighting too many false positives like this. The belongs_to is required by default, meaning it's presence will already be validated.
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@jeremysmithco @jeremysmithco We definitely hit those same type of false positives, but it usually highlights a few notes worth consideration. I’m curious what extra context your review session gets. I’ve been feeling like less is more in my current project.
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@jeremysmithco I’ve had a mixed bag, but generally slightly positive. It’s surprising because we aren’t adding any extra context with claude files, and there’s not all the robust PRD docs, etc. Most strangely, the review prompt is literally just “Review this branch against main, output in MD”
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@ifthencarl @dhh @heyhey Filling out a spreadsheet of 30,000 things to check after deploying to production and emailing it to Kef to review.
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We managed to optimize this even further with a few select tweaks. Now @heyhey's 30K-assertion test suite can run in THIRTY SECONDS on a fast local Linux machine. These are tests hitting the database! Powering a major SaaS app making millions. Ruby is so fast.
DHH@dhh
We now have the entire test suite for @heyhey running in less than a minute on Linux with an AMD 395+! 30,000 assertions. Hitting the real database. Gotta love the speed of the vanilla Rails test suite performance (minitest+fixtures)🤘
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@godwincodes @dhh @igor_alexandrov @heyhey @rspec @claudeai When I was a ruby noobie, I was confused by the zealotry of this too. I spent a lot of time feeling bad that I couldn't figure out why people preferred it so strongly.
I do think the rspec runner is generally pretty dope out of the box though.
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@dhh @igor_alexandrov @heyhey @rspec @claudeai The proliferation of rspec and factory bot is truly one of the most confusing aspects of the industry
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His every post about how fast the @heyhey test suit is makes me envious. Our @rspec suite with 10187 examples (which is comparable in size) takes 20 minutes to run.
We are in the middle of the process of migrating from factories to fixtures (thanks to @claudeai for making this possible). And I hope we will be able to migrate to Minitest by the end of the year.
Good luck to us :)
DHH@dhh
We managed to optimize this even further with a few select tweaks. Now @heyhey's 30K-assertion test suite can run in THIRTY SECONDS on a fast local Linux machine. These are tests hitting the database! Powering a major SaaS app making millions. Ruby is so fast.
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@Zain_Wania @dhh @igor_alexandrov @heyhey @rspec @claudeai In short: Rails with Minitest runs each test in a transaction, so they all have an isolated view of the db. With fixtures, you create a useful initial state at the beginning of the test run that all tests get to start from instead of creating fresh DB state for each test.
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@dhh @igor_alexandrov @heyhey @rspec @claudeai whats the factories vs fixtures piece? im startinmg to consider going back to fixtures now that i understand testiong a bit more
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@jorgemanru @dhh We're using Rails more widely in our company on a full team now, but have issues managing schema migration timing between devs and branches. Lately you guys have been pretty open-book on how 37s works. Any chance we can hear how you manage migrations on a team?
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@jnunemaker I’ve gone back and forth about what kind of context to create (Claude.md, skills, agents, etc). Sometimes I feel like less is more in Rails. But, managing a team of Claude, surely you’re leveraging those kind of context tools. What balance do you use?
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I blurghed. Conducting rails: johnnunemaker.com/conducting-rai…
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@robbyrussell This talk really helped changed my perspective on legacy code: youtu.be/qH_y45he4-o?si…
Most code never earns a legacy to be frustrated by.
YouTube
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Unpopular opinion: The best thing about a 16-year-old Rails app is that it's survived 16 years of production use.
That's not technical debt. That's battle-tested code.
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@rails @fxn @marcoroth_ Congratulations @marcoroth_! I’ve always found your enthusiasm inspiring. You’ve certainly earned this! ReactionView in 8.2!
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Rails Core member @fxn presented the award to @marcoroth_ at the Rails Höck meetup in Switzerland today.
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Congratulations @marcoroth_! The Rails Core team has announced Marco as the 2025 Rails Luminary. The Luminary award exists to celebrate those in the community who have significantly advanced Rails for the benefit of all, through contributions, gems, ideas, or knowledge-sharing, and Marco ticked all of those boxes this year. Read the full announcement here: rubyonrails.org/2025/12/17/mar…
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@zilasino Yes. The context is “market definitions” that get registered to customize how data is processed, and each type is essentially a strategy pattern implementation. It feels pretty good!
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Upgraded to Rails 8.1 and was exploring `bin/ci`. Tests took 6X longer to run in the new CI tooling.
It turns out the env var `CI` gets set to true in the Ruby class, triggering eager loading. I'd prefer that in `bin/ci` instead. Hard to find difference.
#L57" target="_blank" rel="nofollow noopener">github.com/rails/rails/bl…
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@realdoomleika @dhh The most beautiful thing about SQLite’s is the dude is like: take it or leave it, but I think this leads to happiness.
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@dhh I still remember SQLite got the flamme because the creator is a Christian and said most inoffensive thing in their 'CoC' like 'wish you do no evil'.
Turns out boomer Christian have better man most of newer age of dev
news.ycombinator.com/item?id=344776…
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Watching the Omarchy community reject the tired trojan CoC horse of these insufferable and intolerant nut jobs before I even get to see the issue is 😍 github.com/basecamp/omarc…
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@dwaynebradley70 @dhh @_vojto @37signals @usgraphics I’ve really been into ibm-plex(-mono) myself for all the interface, it’s sweet. Wish I could figure out how to style the “file edit view” menus though. Changing everything in font config didn’t do the trick.
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@dhh @_vojto @37signals @usgraphics Personally, I really like Hack (github.com/source-foundry…) It is very close to Cascadia (Caskaydia) in my opinion but just a little taller which makes it easier for me to read. And it is just a simple install away on Omarchy or any other Arch distro: "yay -S ttf-hack-nerd"
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Gotta love this super cool appreciation effect on the Hyprland homepage for our @37signals platinum sponsorship of the project! 😍 hypr.land
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@dhh You've mentioned you are encouraging new devs at 37s to run Omarchy -- do you have thoughts on alternatives to the Kandji situation yet? This has been on my mind since our company shifted to managed devices a couple of years ago. Less easy to "just use what you like".
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@brendanwb Make sure to rollback any migrations that were created by generate before you destroy, or you’ll have a complicated minute!
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Friendly reminder for any Rails devs that you can undo any rails generated code by replacing `generate` with `destroy`. So `rails generate model user` becomes `rails destroy model user`. This is one I don't use often, and as a result never remember the syntax right away.
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I’ve been doing Ruby in Windsurf for certain tasks for about a year now. A few months ago it became worse than useless: it’s constantly taking time away from me. Today I finally correlated it to the gpt4o model switch. Went back to Claude Sonnet 3.7, and it’s magic again.
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