Markdown in Ruby on Rails with RedCarpet

What is Markdown

How we configured OpenTelemetry logs in Rails | SixPatterns

We integrated the OpenTelemetry Ruby logs SDK in a Rails app to export logs directly to a vendor, without running a Collector.

Scaling Rails at Aura Frames: Splitting to 8 Primary DBs and Reaching #1 in the App Store

📌 Overview Ruby on Rails has helped make it possible to scale out the database layer, meeting the demands of millions of Aura Frames customers enjoying their digital photo frames. In late 2025, the team added additional primary databases to expand capacity for peak write and…

Observability for your LLM-powered apps: OTel Instrumentation for RubyLLM

LLM calls are black boxes in production. Learn how to add structured observability to your RubyLLM-powered app with OpenTelemetry.

How I Audit a Legacy Rails Codebase in the First Week

After 50+ engagements, I've learned the first week isn't about reading the code. It's about reading the signals.

A JavaScript developer's guide to Rails: What is Polymorphic Rails Model?

Learn how Rails polymorphic associations work under the hood, from database schema to model setup, with clear examples for JavaScript developers new to ActiveRecord.

Building an AI agent inside a 7-year old Rails application

We run a multi-tenant Rails application with sensitive data and layered authorization. In this post, I walk through how I added the first AI agent tool using RubyLLM, Pundit policies, and our existing Algolia search, without introducing a parallel system or loosening constraints.

How to Read Code from the Showcase Ruby on Rails Engine

We are going to set up Showcase for a Rails application in the first part of this three-part series on Showcase.

rv, a new kind of Ruby management tool

For the last ten years or so of working on Bundler, I’ve had a wish rattling around: I want a better dependency manager. It doesn’t just manage your gems, it manages your ruby versions, too. It doesn’t just manage your ruby versions, it installs pre-compiled rubies so you don’t…

70 Companies You Didn't Know Were Using Rails in 2025

For twenty-two years, thoughtbot has helped companies and organizations of...

Build Custom ActiveStorage Analyzers for Ruby on Rails

We'll dive into how ActiveStorage treats uploaded data, and how to extend this process, in part one of this two-part series.

🔧 Ruby on Rails 8 — Modern Architecture Overview (2025)

Ruby on Rails (Rails) has long been the go-to framework for rapid, convention-driven web development. As of Rails 8 (expected in 2025), the architecture has matured while embracing new paradigms like…

Loving my personal Heroku using Kamal : r/rails

Notes for people wanting to move away from Heroku : r/rails

Prevent logging sensitive information in Rails, and beyond

The Rails defaults are a good foundation, but it’s still your responsibility to filter sensitive information from logs when using external APIs, services, and tools.

Let Rails Help You

Rails gives you the tools to build custom features that still feel native.

Markdown Image Uploads with EasyMDE and Active Storage - Avo

Learn how to add image uploads to a markdown field using the EasyMDE editor, Rails and Active Storage.

Sorting elegantly in Rails with in_order_of

Sorting columns in custom order in Rails elegantly using inemorder/emof.

A Guide to Rails Flashes

If someone tries to steal a penguin, how should you warn them?

Deploy a Rails app close to your users · Fly

How to respect OpenAI's rate limits in Rails

As it turns out, OpenAI’s rate limits are a little more complicated than other APIs.

Avoiding N+1 queries the Railsy way with strict loading

Need to catch N+1 queries without adding any extra dependencies to your project? Strict Loading makes it effortless, but your configurations need to be set up correctly to avoid unexpected behaviors.

Rails 8’s Propshaft, A Sprockets’ quiet replacement?

With the release of Rails 8, asset management in Rails got faster and simpler with the new asset pipeline, Propshaft, which is not only simpler but also more aligned with modern Rails development needs compared to its predecessor, Sprockets.

content_for -- What is it good_for?

The Marie Kondo for bits of HTML that spark joy but have no home.

Advanced Queries in ActiveRecord for Ruby on Rails

Let's delve into advanced ActiveRecord queries, shining a spotlight on more complex joins, custom SQL, and strategic employment of database-specific features.

Ruby on Rails on WebAssembly

Practical Steps to Reduce Heroku Costs

Heroku can quickly get expensive. Dig into this article to learn some concrete strategies to reduce your Heroku bill!

Inbox | Substack

Parklife - Parklife: turn a Rack app into a static build

Rails for everything | Literally the Void

Zero-downtime with Rails credentials part II

Transitioning the codebase from using environment variables to Rails Credentials for Zero-Downtime Deploys.

Rails 8.0: Goodbye Rails::ConsoleMethods - A Developer's Guide to Console Customization

Discover why Rails 8.0 removed Rails::ConsoleMethods, learn the impact on your Rails console, and explore modern alternatives.

Deploy web apps anywhere with Kamal

From bare metal to cloud VMs using Docker, deploy web apps anywhere with zero downtime.

Zero-downtime with Rails credentials

Transitioning the codebase from using environment variables to Rails Credentials for Zero-Downtime Deploys.

Environment variables are not encrypted and therefore they can not be stored in any form of version control.

makes it easier to add new credentials because you don’t need to tell other developers to add them to their own .env file.

Deploying a Jekyll site with Kamal

Since Kamal 2 can host multiple sites on the same server, I am consolidating my apps into larger hosts so I have less servers to worry about. Most of my apps are Rails apps, but I have a few static jekyll sites like this blog and I decided to look into how could I move this site…

4 tips when getting started with Hotwire

A few best practices to keep in mind when getting started with Hotwire and Rails.

Agile Web Development with Rails 8

Get the comprehensive, insider information you need for Rails 8 with the new edition of this award-winning classic.

High Performance PostgreSQL for Rails: Reliable Scalable Maintainable Dat

Build fast, scalable PostgreSQL and Rails apps. Solve data growth, quality, and reliability challenges, for workloads from consumer Internet to enterprise SaaS.

Return to the Rails Way: Installing Ruby on Rails in 2024

Do a 'full fat install' of Ruby on Rails and see what's changed since its heyday of Web 2.0 — and how it has inspired modern frameworks.

Monitor the Performance of Your Ruby on Rails Application Using AppSignal

In the second part of this two-part series, we'll use AppSignal to monitor the performance of our Ruby on Rails application.

How to Use Tailwind CSS for Your Ruby On Rails Project

Let's see how we can use Tailwind CSS in a Rails application and explore its utility-first approach.

HTML Over The Wire

Hotwire is an alternative approach to building modern web applications without using much JavaScript by sending HTML instead of JSON over the wire.

Gemfile of dreams: the libraries we use to build Rails apps

We unveil the toolbox of the Martian Rails engineer; we begin constructing a Gemfile from the universe of Martian gems that encapsulate our philosophy and soul.

Getting Started: Your Ruby On Rails App Hosted On DigitalOcean With AppSign

In the first part of a two-part series, we'll introduce how to set up DigitalOcean and AppSignal for a Ruby on Rails application.

Install Ruby On Rails on Ubuntu 24.04 Noble Numbat | GoRails

A guide to setting up a Ruby on Rails development environment on Ubuntu 24.04 Noble Numbat with Git, MySQL, and PostgreSQL

How to integrate React with Rails 7

Want to setup React on your Rails 7 app but don’t know how do it? Read this post to explore options to consider when using React with Ruby on Rails.

Using Active Storage To Handle Image Uploads In Ruby On Rails

Active Storage is a framework that handles file uploads, allowing you to store them as attachments...

Autotuner: How to Speed Up Your Rails App

Ruby’s garbage collector is designed to be adaptable, scaling from short Ruby scripts to running apps that serve millions of requests per second. While it’s designed to be adaptable, it may not work optimally for every use case. For this reason, Ruby’s garbage collector supports…

SQLite on Rails: The how and why of optimal performance

This is my personal site, where I write about Ruby, programming, and any of my varied fascinations.

Pricing | Heroku

Heroku offers simple, flexible pricing to meet the needs of every app and every organization. Add data stores, cloud services, support, and more.