Articles by Rishi Jain

You’ve decided your Ruby on Rails app needs to move from Bootstrap 4 to Bootstrap 5. Bootstrap 4 is end of life opens a new window and no longer receives bug fixes or security updates. Maybe you also want to get jQuery out of your front end, or maybe a component you need only exists in version 5. The catch is that Bootstrap 5 renames classes and data attributes, and that touches many of the views in the app. In a large application, changing all of them in a single pull request is hard to review, hard to test, and hard to roll back.

We recently borrowed the idea behind the Dual-Boot technique opens a new window , running two versions of a dependency side by side, for something other than Rails: Bootstrap itself. Instead of upgrading everything at once, we kept both versions in the app and moved one controller at a time, for many of the same reasons that you might upgrade Rails in increments opens a new window . In this article, you will learn how to run Bootstrap 4 and 5 side by side in one Rails app, how to pick the version per controller with a layout, and how to sequence the migration into small pull requests.

Writing effective test cases is as important as writing the business logic in your application. This blog post dives into the simple yet effective ways developers can use when crafting test cases.

At FastRuby.io, we spend a lot of time upgrading Ruby and Rails applications. However, we do more than just that, we also pay attention to other areas of the application that can be improved. For example, we recently migrated a customer’s application from Sprockets to JS bundling with esbuild opens a new window .

In this article, I share my experience migrating from Sprockets opens a new window to JS Bundling opens a new window (JavaScript Bundling for Rails).

This is not a step-by-step guide, as each application has its own unique needs. Instead, I discuss the problems I encountered and the approach I took during the migration to JavaScript bundling.

There’s abundant online guidance about refactoring controllers and keeping them lightweight, but resources on model refactoring are less common. In this blog, we’ll explore some techniques for effectively refactoring models.

Imagine your customers are complaining that a few specific pages in your application take forever to load and you get to work to fix the issues. But there is a problem. You don’t know where to begin. If this journey of seeking truth, I mean answers, interests you, then read the rest of the article.

When it comes to improving application performance and areas to focus on, I would recommend looking at the APM data, and then deciding which areas to prioritize.

However this article isn’t about where to focus efforts, but rather a compilation of techniques to improve your application’s performance, from tackling common problems like N+1 queries and database indexing to leveraging the jemalloc memory allocator. Let’s look at these performance-boosting strategies designed to fine-tune your application.

If you are upgrading a Rails application, you may come across the configuration of load_defaults in the config/application.rb file.

In this article, we will learn more about what to do with this configuration when working on a Rails upgrade.

In this blog post, I detail my journey upgrading a client’s Ruby from version 2.7 to 3.0. While some of the approaches I took may be tailored to their specific needs and might not directly apply to your situation, they offer insights into one possible path for upgrading Ruby, particularly in scenarios with limited test coverage.

When you upgrade a Rails application from Rails 6.1 to 7.0, you may suddenly see a lot of changes in the schema.rb file and wonder where those changes come from and how to deal with them.

In this post, we look at what those changes are, and how to deal with them when upgrading a Rails application.

If you are using the i18n gem opens a new window with Ruby 3.0 or are planning to upgrade Ruby to 3.0 while using the i18n gem, this blog post will cover a gotcha that can be tricky to understand.

Ruby on Rails opens a new window is a popular web application framework that is constantly evolving with new versions being released frequently. While upgrading to a newer Rails version can bring new features, better performance, and security patches/improvements, it can also be a challenging task.

In this blog post, we will discuss 7 common mistakes made while doing Rails upgrades opens a new window and how to avoid them.

Have you ever wondered what the values on the request queue graph in the APM tool meant or whether a certain value indicated good or poor performance?

The fundamentals of request queue, factors that contribute to longer request queues, and other topics will be covered in this post.

Upon integrating any performance monitoring tool for your application, you must be observing p95, p99 response times on the dashboards. If you are wondering what do these terms and their values mean, you have come to the right place.