#activerecord articles

YVYashika Vijayvargiyarailswithyashika.hashnode.devJun 15 · 4 min read

PostgreSQL Concurrent Indexes in Rails: Avoiding Downtime in Production

In this article, we'll explore what concurrent indexes are, why they matter, and how to safely create them in Ruby on Rails. The Problem with Normal Index Creation Suppose we have a large users table

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YVYashika Vijayvargiyarailswithyashika.hashnode.devJun 8 · 4 min read

Rails Performance Optimization: Fixing N+1 Queries with includes, preload, and eager_load

What is an N+1 Query? Suppose we have the following models: class User < ApplicationRecord has_many :posts end class Post < ApplicationRecord belongs_to :user end We fetch all posts: @posts = Po

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AGAshish Gaurcodingwithaglassofmilk.hashnode.devMay 30, 2025 · 2 min read

Polymorphic Associations

What is Polymorphic Associations ? With Polymorphic Association a model can belong to more than one models with a single association. Let’s take an example, we’ll use polymorphic associations as shown in the following schema: In the above schema p...

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AGAshish Gaurcodingwithaglassofmilk.hashnode.devMay 30, 2025 · 2 min read

Single Table Inheritance

What is Single Table Inheritance ? Single Table Inheritance is a mechanism through which ActiveRecord can share fields and behavior between different models while using a single table. For eg. let’s say we need to create a Vehicle model and Car mod...

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AGAshish Gaurcodingwithaglassofmilk.hashnode.devMay 30, 2025 · 5 min read

Eager Loading

What is Eager Loading ? Eager loading is a mechanism through which ActiveRecord loads the associated records in memory, reducing the number of executed sql queries. There are following ways to do eager loading in ActiveRecord: includes preload eag...

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NINonStop io Technologieshallucinations-in-llms-101-part-i.hashnode.devMay 15, 2025 · 6 min read

Rails Query Optimization: Part 2— Advanced Indexing and Query Refactoring

In Part 1, we explored essential query optimization techniques and tools like Bullet and Prosopite gem. In this part, we delve into advanced indexing strategies and query refactoring methods that can significantly boost performance.1. Advanced Indexi...

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NINonStop io Technologieshallucinations-in-llms-101-part-i.hashnode.devApr 29, 2025 · 6 min read

Rails Query Optimization: Part 1 — Introduction and Best Practices

Optimizing database queries is crucial for maintaining a fast and efficient Ruby on Rails application. Poorly written queries can lead to performance bottlenecks, memory leaks, and even downtime. In this multi-part series, we’ll explore various techn...

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YPYacine Petitprezanykeyh.hashnode.devApr 7, 2025 · 9 min read

Passive Record

In our journey to build a scalable, maintainable, and robust event-driven microservice architecture, we made a fundamental decision early on: to abandon the traditional ActiveRecord pattern in favor of a more explicit approach combining Repository an...

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AGAbdelrahman Gamalabdogamal.hashnode.devFeb 14, 2025 · 2 min read

Understanding Active Record Transactions in Rails

Introduction Hey folks! Today, we’re going to have a simple and brief talk about Active Record transactions in Rails. We won’t dive too deep, but I’ll give you a glimpse of how useful they are. Active Record transactions ensure that all operations wi...

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RPRenan Portotota1099.hashnode.devNov 11, 2024 · 2 min read

Rails - Active Model

O Active Model é uma biblioteca que possui recursos que podem ser usados em objetos Ruby simples que requerem recursos semelhantes aos de um modelo (model), mas não estão vinculados a nenhuma tabela em um banco de dados. Resumindo, o ActiveRecord d...

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