Rails Foundation Contributing Member

Ruby on Rails consulting from engineers who work deep in Rails.

Saeloun helps teams modernize Rails applications, improve performance, untangle production issues, and ship product work with a senior Rails and React team in Boston and Pune.

602+
engineering articles
2019
founded in Boston
Rails
Foundation member

Latest Rails, React, and engineering articles

Field notes on framework changes, performance, upgrades, testing, and product engineering.

• authorImg Alkesh Ghorpade
authorImg Alkesh Ghorpade

I am a seasoned developer with over 9 years of experience in Ruby on Rails and Golang. My passion lies in tackling complex data structures and algorithm problems, always pushing myself to learn and grow. In my downtime, I find solace in the pages of books and the soothing sounds of a guitar. But I'm not just a one-trick pony! I love to stay active and challenge myself in other ways too. Whether it's on the football pitch, cricket field, table tennis table, or badminton court, I'm always up for some fun activities.

Rails 7 if_exists for Foreign Keys

Rails 7 adds support for `if_exists/if_not_exists` on `remove_foreign_key/add_foreign_key` in migrations to silently ignore raised exceptions.
• authorImg Manmeet Singh
authorImg Manmeet Singh

Manmeet brings expertise as a Ruby on Rails Developer, crafting high-quality and maintainable backend systems.

Rails 7 MySQL Security Improvements

MySQL adapter in Rails 7 casts numbers and booleans to string to avoid security vulnerabilities.
• authorImg Archana Patil
authorImg Archana Patil

As a full stack developer with over 12 years of experience, I've worked on various tech stacks and I'm currently honing my skills in React as a frontend developer at Saeloun. My passion for learning drives me to stay up to date with the latest technologies. Originally from Pune, I enjoy spending my free time reading history books and discovering new places to explore.

React 17 Event Delegation Changes

React 17 delegates events to the root node instead of the document node, making it easier to embed React into apps built with other technologies
• authorImg Manmeet Singh
authorImg Manmeet Singh

Manmeet brings expertise as a Ruby on Rails Developer, crafting high-quality and maintainable backend systems.

Ruby 3.1 Pin Operator for Pattern Matching Explained

Ruby 3.1 extends the pin operator (^) to support expressions and ranges in pattern matching. Learn variable pinning with examples.
• authorImg Nishant Samel
authorImg Nishant Samel

Nishant is a Senior Software Developer with 12+ years of experience, passionate about building software and contributing to open source. He has contributed to projects like Rails and Ruby CoffeeScript, and enjoys reading and outdoor activities in his free time.

Rails 7 Adds previously_persisted?

Rails 7 adds previously_persisted? method to check an object previously existed in the database and presently deleted.
• authorImg Prasad Walvekar
authorImg Prasad Walvekar

Prasad is a Frontend Developer with over five years of experience, specializing in building high-performing and visually engaging web platforms.

React 17 introduces new JSX transform

React 17 introduces jsx-runtime and jsx-dev-runtime that enables the user to write JSX without importing React.
• authorImg Deepak Mahakale
authorImg Deepak Mahakale

Deepak is an Engineering Manager at Saeloun who leads project delivery, mentors developers, and actively contributes to the codebase.

Rails 7 adds AudioAnalyzer to ActiveStorage

Rails 7 adds AudioAnalyzer to ActiveStorage to extract audio duration and bit_rate.
• authorImg Keshav Biswa
authorImg Keshav Biswa

Keshav is a Senior Software Developer with expertise in Ruby on Rails. He is committed to building robust, high-quality systems while leading a project delivery.

Rails 7 Generators Validate Attributes

Rails 7 generators will validate the type by checking if it is of a default migration type and will raise an error if it is invalid.
• authorImg Jijo Bose
authorImg Jijo Bose

I'm a Ruby on Rails and React Native enthusiast with over four years of experience creating innovative software solutions. I work well in teams and am always up for challenging projects. I enjoy playing chess and gaming in my free time.

Babel 7.14 Class Fields by Default

Starting from Babel 7.14 @babel/plugin-proposal-class-properties and @babel/plugin-proposal-private-methods plugins are enabled by default in @babel/preset-env.
• authorImg Manmeet Singh
authorImg Manmeet Singh

Manmeet brings expertise as a Ruby on Rails Developer, crafting high-quality and maintainable backend systems.

Rails 7 Raw SQL in ActiveRecord upsert_all

Rails 7 allow passing raw SQL statements to `on_duplicate` and `returning` option as value to ActiveRecord `#upsert_all` method.