How to build a complete, real-world application from scratch with Ruby on Rails step by step.
A lot of Ruby code is "magic". We'll explain the magic and see how it works using the powerful tools Ruby gives us.
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HTML provides some handy attributes for buttons to target specific forms on the page. Learn how to use them to improve your Rails application forms.
Ruby 3.4 added 'it' to reference a block parameter with no variable name. Let's check it out!
Hotwire Spark is a new live reloading tool for Hotwire applications that uses morphing to update the page smoothly.
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.
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.
Calculating dates is helpful, but what if we took the black_friday gem a step further by adding sales?
Black Friday is a popular shopping holiday every year. In this lesson, we'll build a Ruby gem to help automate our Black Friday sales each year.
Adding delivery methods for notifications with Noticed is pretty easy. Today we'll look at using Bluesky's API to deliver notifications as posts on our feed.
Rails engines often need a way of providing JavaScript for their views. We can do this using Importmaps regardless of what the application is using for assets.
Import maps are great, but how do they work? In this lesson, we'll demystify import maps and see how they integrate with Rails' asset pipeline.
Rails 8 now ships with multiple databases by default. In this lesson, we'll learn how the configuration works and how to deploy to production with environment variables
Devise has a couple handy routing helpers to constrain routes for authenticated users. In this lesson, we'll learn how to do this from scratch by adding routing constraints Rails' built-in authentication generator
The Rails authentication generator is an awesome new addition with Rails 8 so let's explore how we can customize it to support user impersonation.
Rubocop Rails Omakase is just a starting place and provides a handful of rules.
Captchas help prevent bots from spamming your Rails applications so today we're implementing Cloudflare's Turnstile captchas.
Rails 7.2 now warns if any test runs without assertions. It helps make tests that may raise errors more explicit and less prone to mistakes.
If you've ever had Rails fail to decrypt credentials, it might be because of a rogue newline. We ran into this and decided to submit a PR to fix this in Rails.
Rails 7.2 introduces the enqueue_after_transaction_commit config but this wouldn't take effect when upgrading Rails apps, so we fixed it by changing the load order.
Formatting Ruby code can be a point of contention because the language is so flexible, but it
Enqueuing jobs inside of a database transaction is a common mistake that's now handled for you automatically in Rails 7.2
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