The Ruby and Rails community linklog
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Last Tuesday
Testing Rails from Scratch book now includes integration testing
Hello, I’ve released two new chapters to my work-in-progress book Testing Rails from Scratch! The highlights this time are two new chapters on integration testing, along with several revisions to the test data chapters.
PostnHost - Open source Multilingual Rails CMS
It comes both as a self-hosted Rails app and as a drop-in Rails Engine, with multilingual content, structured data, version control, and a rich editor. [more inside]
SolidQueue batches: evolution and architecture
The SolidQueue batches 2.5 year architectural journey, filled with O(n^2) algorithms, hot row contention, excessive jobs, and much in between [more inside]
Video: Glimmer DSL for Web 0.10.3 Append & Prepend Mutations
Release video for Glimmer DSL for Web (Award-Winning Frontend Framework for Ruby on Rails) 0.10.2 & 0.10.3 Append & Prepend Mutations
The Race Your Rails Validation Cannot Prevent
A source-backed explanation of why two Rails uniqueness validations can pass concurrently, how a composite unique index arbitrates the inserts, and how Active Record exposes the losing write. [more inside]
typst-rails: use Typst for PDF production in Rails
Just released typst-rails, a PDF templating solution for Rage and Rails apps: [more inside]
I Tested Rails Baseline by Leaving Architecture Out of the Prompt
What two fresh coding-agent sessions revealed about an agent-friendly Rails starter. [more inside]
llm.rb v15.1.0 released
llm.rb is an advanced runtime for building agentic AI applications on CRuby. It has zero runtime dependencies by default, supports concurrent and parallel tool execution and has a single coherent API that spans 14+ providers.
When Should You Raise an Exception in Ruby?
How to decide between raising an exception and returning a value in Ruby by separating expected outcomes from failures that break a method’s contract. [more inside]
llm_cost_tracker v0.14.0: per-tag LLM budgets and a batch of cost-accuracy fixes
llm_cost_tracker is a Rails engine that records what your app spends on LLM APIs - per call, per model, per tag - into your own database, with a mounted dashboard. [more inside]
How I found two command injections in the spatial_features Ruby gem
While using the spatial_features Ruby gem for a side project, I noticed that filenames were being passed to system. It led me to two command injection paths, fixed in version 3.11.2. Here’s how I found them, built the PoC, and reported the issue:
How to Test User Registration with Minitest Rails
Rails 8’s bin/rails generate authentication gives you sign-in, sign-out, and password reset but it does not give you a way to register new users to the app. In this post you will add the registration feature and test it with Minitest: [more inside]
RailsDocks - Rails hosting the way it should be
I built RailsDocks because deploying a Rails application shouldn’t require becoming a part-time infrastructure engineer. [more inside]
Rails Baseline 1.0: A Rails SaaS Starter Built for Coding Agents
I shipped Rails Baseline 1.0 today. [more inside]
Install rv as a mise tool
If you’re already using mise and would like to try rv, you can install it by following this guide:
ActiveRecord with update_all/delete_all with returning option
- this could be useful to know what actual records were updated/deleted. A small utility gem to solve this problem.
Access control for AI agents on Rails: gating SQL with Action Policy
An AI assistant with read-only SQL is a superhero. Until it fails privacy responsibilities and leaks sensitive data to everyone. We noted this possibility in an internal tool, moved the data boundary from prompt to Action Policy, and kept open-ended SQL: Access control for AI agents on Rails: gating SQL with Action Policy
A fresh look at Hanami
I revisited Hanami recently, and liked it! Here are my initial thoughts and impressions after completing its starter tutorial. I’ll be digging in further soon, so stay tuned. [more inside]
A Guide to using Batches in SolidQueue
Digs into the new batch feature in SolidQueue. How to configure it, how to utilize the APIs, advice on how to structure a batch, and code inspiration - like splitting a RubyLLM chat into parallel sub agents using batches [more inside]
Video: Glimmer DSL for Web Release Version 0.10.0 & 0.10.1
Release video for Glimmer DSL for Web (Award-Winning Frontend Framework for Ruby on Rails) 0.10.0 & 0.10.1 Auto-Conversion of Date/Time Element Values + New Sample
Coding guidelines
What holds in any language. What holds in Ruby. What holds in Rails. Extracted so I don’t have to tell agents how to write my code every time. Which ones do you approve? Which ones do you reject? [more inside]
The Persistence APIs That Skip the Record Lifecycle
A source-backed guide to what delete, update_columns, update_all, insert_all, and upsert_all do with callbacks, timestamps, locking, and loaded objects. [more inside]
Authorization testing in Rails
Chapter 13 of the free Minitest Rails guide is out now. Learn how to test Rails authorization with Minitest: [more inside]
JetUI — open source Rails component library
JetUI is an open source Rails 8 component library we’ve been building at JetRockets — 29 components, 8 form fields, and 61 UI blocks, built on ViewComponent, Tailwind CSS 4, and Stimulus. Copy-paste, not a dependency. We’re just about to hit 5,000 downloads. [more inside]