Mastering Derived Tables in Rails
by Hey fellow Rails developers! Ever found yourself wrestling with complex SQL queries that involve aggregations, subqueries, or needing to join against computed results? Today, we’re …
Tag: ActiveRecord
Rails Multi-Databases and Tenancy: How You Can Do It TodayExploring how to implement multi-databases and tenancy in Rails 8.1 with SQLite and ActiveRecord::Tenanted
by Portuguese version here: https://tech-pills.github.io/2025-09-18-Rails-Multi-Databases-e-Tenancy-como-fazemos-isso-em-2025/ Hey everyone! Hope you’re doing well. So, you’re building an application and you’ve reached that moment when you think: "Damn, how …
Database Relationships Explained: From Theory to Rails ImplementationFrom Core Concepts to Building Robust Rails Applications
by Before we dive into the topic of relationships between tables in a relational database, it’s worth revisiting the key concepts we explored in our previous …
ActiveRecord Callback Chain: A Cool (and Weird) Edge Case
by Image by jcomp Well, it’s been a while. After a lot of time… I’m back! (￣▽￣)/ If you haven’t read my last post, give it …
Destroying an Association Marked as Read-Only in Rails
by Read-only is a boolean setting. When true, it prevents an Active Record instance to be updated or destroyed. Although very helpful, there are a few …
Using ActiveRecord to create atomic transactions
by Imagine the following situation: You were asked to create a new wallet feature to an application. This wallet must allow money transfer between users. Basically, …