kevin-j-m

A summary of my time at Rocky Mountain Ruby 2026.

There are options to applying validations conditionally in ActiveModel. I encourage you to also consider other ways to model your rules. Hit the link to read through some options.

A summary of my time at Blue Ridge Ruby 2026

A way to compare two SimpleCov runs.

SimpleCov::Compare is a gem to find the lines coverage difference between two SimpleCov runs.

I prefer to limit controllers to use the “default” seven actions supported by using Rails’ resource routing. My reasoning has nothing to do with performance or technical benefits.

A summary of my experience at the last RailsConf.

If a concern defines a callback and is included in a controller with other callbacks, what order do all the callbacks run in? Find out in this post!

Follow the journey through Rails’ source code to explain application behavior with flash messages.

Have you heard about it? Have you used it? Are you excited about it?

What is it, and how can you use it in ruby? Find out!

A summary of my time at RubyConf 2024.

Have you ever tested a method that pulls records out of the database and applied mocks to those records you just created in your test? Have you been surprised that the record does not appear to have the behavior you mocked out? I have an explanation of the situation for you and some options for how you can address it.

How do you access request AND response headers in a rails controller? What does the headers method refer to? Let’s dive into the Rails source code to investigate a failing rspec request spec.

Whether you were at RailsConf and wish we were still there, or missed it and you’re curious, I’ve got you. I wrote about my takeaways from RailsConf 2024.

This post introduces Sidekiq Pro’s batches feature. It builds some tests that exercise batches to explain how they work.

When we were putting the RailsConf program together, I brainstormed track options. We didn’t end up using them, so here are eight tracks you won’t see at RailsConf 2024.

An attendee’s perspective of my time at RubyConf 2023.

This presents sources that highlight Ruby news on a weekly basis, giving you something to follow each day of the week.

Recently I asked how people prefer to see inherited behavior tested. This discusses each of the options in more detail and shows the results of the poll.

Last week at Blue Ridge Ruby, we heard a lot of great talks. I compiled a brief summary of the program.

This post explores how flog, a tool that analyzes the complexity of your code, can identify areas to refactor.

This post explores inheritance and composition as a way to build and share behavior in a system to model guitar amplifiers.

Domain modeling is a tough and vast topic. I think hard and fast rules are difficult to come by. There are definitely guidelines and principles you can use though. I've compiled some of my favorites to code a system to play the guitar like one of my favorite guitarists.

Calling freeze on an object may not provide the immutability you expect. Here we dig into some of freeze's nuances to explore a surprise of my own making I encountered working with ActiveSupport.

Ruby’s Coverage module can now measure coverage of eval. Let’s explore how it works and why it’s important.

This post celebrates my first code commit merged into Ruby with the years-long tale of what put me in position to make the change.

Did you miss RubyConf Mini and are you wondering what happened? Were you were there and want a hit of nostalgia about that thing from DAYS ago? I’ve got you covered with my recap.

Are you looking for an elegant solution to pipe output from your Ruby code to Sonic Pi? This isn't it. But it does work.

This post utilizes a score of Array and Enumerable methods to model music notes.

Secret agents must keep followers off their trail. Your tests don’t have to. There are many options to arrange test doubles with RSpec. This article proposes doing so in a way that provides a consistent test organization.