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Expert advice on keeping Rails apps organized and fast.

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A few of the Open Source projects we do at GoRails.

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11m

Ruby Module Include Tracking

Apr 19, 2020 Pro

Sometimes you might want to keep track of all classes a module was included in. We can do that with a couple nifty tricks to make this work with both regular Ruby modules and Rails concerns.

7
8m

Wrapping Exceptions in Ruby

Mar 31, 2021 Pro

Sometimes you may need to wrap and reraise an exception. Ruby 2.1+ makes this easy by letting us raise a new error, pass in the old one, and automatically assigns the exceptions "cause" which is the original exception.

3
8m

How to use "ensure" in Ruby

Mar 14, 2022 Pro

Using ensure with blocks is extremely helpful for cleaning up things. We'll learn how to use ensure in Ruby for cleaning up open files as well as temporarily changing values for requests or test stubs.

4
15m

Eigenclasses

May 30, 2022 Pro

In this episode, we will be looking into Ruby's eigenclasses or singleton classes. We will first look at singleton methods and then how we can access the eigenclasses of objects.

11
13m

The Behaviors Of Super

Oct 13, 2023 Pro

In this lesson, we will look at the various ways we can use the super keyword in Ruby in regard to forwarding method arguments to the equivalent method in a parent class.

2
16m

Scraping Web Pages with Ruby

Feb 26, 2024 Pro

Kicking off our Web Scraper series, we start out with the bread and butter: scraping web pages with Ruby and Nokogiri.

2
5m

__FILE__, __dir__, and Symlinks

Aug 05, 2024 Pro

Ruby's __FILE__ and __dir__ work slightly differently with symlinks that you might not realize. Let's check see how it works.

0
8m

Linux Signal Trapping in Ruby

Dec 11, 2023 Pro

Catching signals from the operating system like Ctrl-C can be very useful for safely shutting down your Ruby process. In this lesson, we'll see how the Rails server catches Ctrl-C and gracefully shuts down.

0
18m

Parsing Markdown Code Line Highlighting with Ruby

Dec 09, 2024 Pro

We needed a feature to highlight lines in Markdown code blocks for the Rails guides. This is a fun Ruby challenge with many different solutions.

2
11m

Frozen String Literals in Ruby 3.4

Dec 16, 2024 Pro

Ruby 3.4 now raises warnings anytime you mutate a string literal. Learn how to fix our code and use frozen string literals to improve performance.

1
7m

Hash Fetch with Default Value

Jan 27, 2025 Pro

In this screencast, we explore Ruby's Hash#fetch method and how it handles default values. We show how providing a direct default value vs a block affects performance, especially important in Rails apps where unnecessary operations can impact speed.

6
20m

HTTP Server from Scratch: Rack & Rails Support

Jul 20, 2021 Pro

Last episode, we built a multi-threaded HTTP server from scratch using Ruby. This week, we'll enhance our web server by adding Rack and Rails support.

3
21m

Code Review: Refactoring the Receipts gem for Composability

Feb 27, 2022 Pro

Designing code for composability allows you to make code more testable, flexible, and easier to adapt in the long term. We'll look at how I recently refactored the Receipts gem so that you can easily customize receipts and still use built-in components.

2
15m

Error Handling Ergonomics in Noticed

Oct 03, 2022 Pro

Errors can come up in many different ways. This episode, we'll look at how we can improve error handling in the noticed gem to cleanly handle issues with ActiveRecord without negatively affecting

0
14m

The Ruby Subscript Operator

Jan 09, 2023 Pro

Rails uses the Ruby subscript operator to implement versioning with ActiveRecord Migrations. We'll learn how this works and implement it from scratch to see how it all ties together

6
28m

HTTP Server in Ruby from Scratch

Jul 13, 2021 Pro

Ever wondered how Puma, Unicorn, or other Ruby HTTP servers work? We'll build one from scratch with pure Ruby so you can see exactly how it works.

5
12m

Lazy Requiring Dependencies in Ruby

Feb 03, 2025 Pro

Normally, we require dependencies at the top of files, but today we'll see where and when we might want to lazily require dependencies.

8
14m

Refactoring with Enumerable partition

Jun 10, 2024 Pro

In this lesson, we will look at how to clean up code that iterates over a collection twice to separate the elements out to only doing so once while achieving the same result by leveraging the partition method from Ruby's Enumerable module.

0
21m

Refactoring Rubocop GitHub Action

Dec 16, 2019 Pro

Today we're refactoring Andrew Mason's GitHub Action that runs Rubocop against your repository. We'll pull out some concepts, remove conditionals, and use several other techniques to clean up the code.

1
32m

Net Http API Client from Scratch

Feb 20, 2023 Pro

In this episode we will look at using Ruby's built-in Net::HTTP class to build API clients for making http requests.

8
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