Ruby On Rails

Tutorials

Rails Testing on Autopilot: Building an Agent That Writes What Developers Won't | Mistral AI

Rails Testing on Autopilot: Building an Agent That Writes What Developers Won't | Mistral AI In most large Rails monoliths, organizations prioritize writing new features over writing tests for them. Over time, more and more code goes untested, forcing teams to spend more time debugging painful bugs. We built an autonomous agent that clos...

How I Audit a Legacy Rails Codebase in the First Week

How I Audit a Legacy Rails Codebase in the First Week My legacy Rails app playbook. After 50+ engagements, here's the exact process, tools, and stakeholder questions I use in week one.After 50+ engagements, I’ve learned that the first week isn’t about reading the code. It’s about reading the signals....

Storing multi-valued enum fields in ActiveRecord | SINAPTIA Rails’ enum DSL is great for single values, but what about multiple? We compared 4 approaches across performance, extensibility, and maintainability to find the best fit.

htmx Infinite Scroll | Alchemists

htmx Infinite Scroll | Alchemists Pagination is always a feature you have to tackle in web application development in one form or another. A common approach is to use a gem, like Pagy, to provide the following capabilities: Load records in batches (a.k.a. pages). Previous and ne...

Smooth UI animations on server-rendered HTML | Adrien Siami

Smooth UI animations on server-rendered HTML | Adrien Siami I’ve been using Hotwire in production since the beta release of Turbo, and it’s changed the way I build web apps. It’s a great way to get SPA-like interactivity at a fraction of the complexity. In this article, we’ll explore how we can use Turbo ...

Using Minitest::Spec in Rails? Watch out for the lifecycle hooks! - Remi Mercier - Freelance Software Developer

Using Minitest::Spec in Rails? Watch out for the lifecycle hooks! - Remi Mercier - Freelance Software Developer A small mistake sent me on an overly long investigation into Minitest hooks, and how Rails integrates with these.After picking up Minitest to complement the QA process of one of my retainer clients, I’ve had confusing errors in our test suite for ...

Building LLM-Friendly MCP Tools in RubyMine: Pagination, Filtering, and Error Design | The RubyMine Blog

Building LLM-Friendly MCP Tools in RubyMine: Pagination, Filtering, and Error Design | The RubyMine Blog RubyMine's Rails Toolset shows how to design LLM-friendly MCP tools, covering pagination, filtering, overcoming context limit, and AI assistant constraints.

gem.coop

gem.coop We’re excited to introduce gem.coop – a new server for gems in the Ruby ecosystem. We aim for fast, simple hosting, that is compatible with Bundler but optimized for the next generation. It’s built for the community by the former maintainers and o...

SchwadLabs — Software That Just Works

SchwadLabs — Software That Just Works Public data tools built to be understood at first glance. No manuals, no onboarding flowsThat's a complete, runnable application. A window with a button. Click it, get an alert. No boilerplate, no imports, no build system. Just Ruby being Ruby. T...

Writing custom RuboCop rules in 2026—Martian Chronicles, Evil Martians’ team blog

Writing custom RuboCop rules in 2026—Martian Chronicles, Evil Martians’ team blog Write and ship modern custom RuboCop cops in 2026: learn the new plugin system, requires_gem API, InternalAffairs best practices, safe autocorrection nuances, and design trade-offs for building robust, future-proof lint rules.

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