ActiveRecord - The Miners

Rails Multi-Databases and Tenancy: How You Can Do It Today
Exploring how to implement multi-databases and tenancy in Rails 8.1 with SQLite and ActiveRecord::Tenanted

by Miguel MarcondesSeptember 19, 2025September 19, 2025

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 Implementation
From Core Concepts to Building Robust Rails Applications

by Igor DamascenoJune 24, 2025July 24, 2025

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 Luan GonçalvesJuly 7, 2021July 4, 2023

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 Adriano CostaDecember 17, 2018October 17, 2023

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 Mauricio KleinApril 23, 2016

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, …