I Tested Rails Baseline by Leaving Architecture Out of the Prompt
Note: Rails Baseline is the production-ready Rails foundation I tested here. It gives a new SaaS application and the coding agents working in it cle…
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I Could Hack My Own Rails App With One Hidden Input
I've been building RepBoard , a Rails app that gives freelancers a portable reputation profile — collect reviews from clients, share one professiona…
Rails Routing & APIs: What Actually Happens Between the URL and Your Controller
When I started studying APIs more seriously, I realized there was a problem with the way I was learning. I knew how to create a Rails API. I knew ho…
Performance Gains After a Rails Upgrade from 7 to 8
Between deprecation warnings, gem compatibility checks, and the inevitable late-night debugging session, the process can feel like a lot of effort f…
Fixing "g++ Not Found" When Debugging Rails in RubyMine on Fedora
Fixing "g++ Not Found" When Debugging Rails in RubyMine on Fedora TL;DR: If clicking "Debug" in RubyMine on Fedora fails to install debase because o…
When a build breaks, the bug fixes itself
When a build breaks, the bug fixes itself We stopped babysitting CI failures. Now a red build files its own bug — and an AI agent picks it up and sh…
Built a Blog App with Rails & PostgreSQL – Looking for Code Review!
Hey DEV community! 👋 I've been working on a Blog Application built with Ruby on Rails to practice backend architecture, clean code standards, and Ra…
Work-in-progress updates on my new book, Testing Rails from Scratch
Hello! It has been a couple of months since I announced my latest project, Testing Rails from Scratch: A practical, (mostly) out-of-the-box approach…
Learning Go as a Ruby Developer — Part 4: What can we do with a single "for"
So loops in ruby has several ways to implement 10 . times do | i | puts i end while condition # ... end users . each do | user | # ... end until fin…
Why I Stopped Waiting on Ruby LSP and Built My Own Fuzzy Symbol Search for VS Code
If you've worked in a mid-to-large Rails codebase in VS Code, you've probably run into this: you want to jump to a method, you hit Ctrl/Cmd+T, you t…
One Rails request, one event: production context for coding agents
Wide Events is a Rails gem that puts the production context a coding agent needs onto one OpenTelemetry root span per request or job. In one product…
Building a low-friction DBT skills companion for the web
I built DBT Companion, a free, mobile-friendly web app for exploring skills commonly taught in dialectical behavior therapy: https://dbt-companion.o…
3 Action Mailer Features I Didn't Know Existed
A few weeks ago I needed to check something in the Action Mailer docs, just a quick lookup. I ended up spending much more time there than expected a…
Real-Time Rails Without Turbo: Modern Reactive UIs with Inertia and DexieCable
Hotwire and Turbo Streams have become the default answer for real-time applications in the Rails ecosystem. They are great for HTML-over-the-wire se…
Ruby Reactor vs dry-transaction vs Trailblazer: Choosing a Ruby Workflow Library in 2026
Four ways to orchestrate business logic in Ruby. One map to find yours. You're building something that involves multiple steps. Charge a card, send…
24 Days of Coding: An 86-Hour Roadmap from Truck Driver to Web Engineer
1. Introduction Hello from Japan! 🇯🇵 I am an active truck driver in Japan self-studying Python and Web technologies, leveraging my logistics domain…
Deploying Rails 8 on Render Free Tier: Bypassing the 512MB RAM and Read-Only Storage Limits
1. Introduction Hello from Japan! 🇯🇵 I am an active truck driver in Japan self-studying Python, leveraging my logistics domain knowledge to become a…
Rails already ships class_names. I built clsx anyway.
When I published a little gem for conditional CSS classes two years ago, the first comment was Adrien Poly asking the obvious thing: "What is the ma…
Add newsletter subscriptions to Rails 8 signups
Users are creating accounts on your new Saas. Yay (and not just family and friends or bots). Yay! Now comes the next step from every marketing handb…
Solid Queue has no alerting, so I built QueuePulse
Rails 8 made Solid Queue the default Active Job backend, and it's excellent: database-backed, no Redis, and Mission Control Jobs gives you a dashboa…
The four places a hand-rolled Ruby facade gives out
You don't need a gem to build a facade. This is a perfectly good one: class App def self . config = Rails . configuration def self . redis = REDIS_P…
Your next model upgrade won't close this gap
There's a comfortable thing people say when they see an AI agent query a code map. "Nice crutch. For now." The logic underneath it is reasonable. Co…
Design Patterns in Ruby #2: Observer Pattern
Applications often need to react when something changes. When a user signs up, you might want to: Send a welcome email Create a user profile Log the…
Kiro for Ruby: Generating Rails Controllers and Models
You want to add a new resource to your Rails app. You know the drill — rails generate , tweak the migration, add validations, write the controller a…
Choosing the Right Backend Framework: Django vs. Gin vs. Ruby on Rails.
Every application we use today—from banking apps to social media platforms—has something working behind the scenes. That hidden engine is called the…
GitHub Copilot Is Rewriting How You Think About Database Design — And Not in a Good Way
You're staring at a Rails schema with 47 tables. The foreign key relationships are a bowl of spaghetti — timestamps everywhere, no documentation, an…
HTTP/3 on Kamal, and a PR to Basecamp
A few days ago I read a good writeup on how much HTTP/3 can shave off page loads — QUIC drops a round trip on connection setup and survives network…
Your SQL Is Fast but the API Is Slow: It's the Ruby Layer
Rails Performance: Lessons from Production — #6 By now the DB queries, caching, and background work are handled. But sometimes the SQL is genuinely…
How to add a NOT NULL column to a large table safely in Rails
A migration that runs in two milliseconds on your laptop can lock a production table for thirty seconds and pile up every request behind it. The gap…
The Fastest Query Is the One You Never Run: The Four Layers of Rails Caching
Rails Performance: Lessons from Production — #4 The first three posts were about making queries cheaper — fewer N+1s, indexes, not dragging data bac…