Paweł Urbanek • 1/10/2023

Easy to Overlook Way to Break Eager Loading in Rails Apps

This article discusses a common but overlooked issue in Ruby on Rails where eager loading fails when using custom SQL ORDER BY sorting on ActiveRecord relations. It demonstrates how chaining methods like `by_rating` scope invalidates eager loaded collections, causing N+1 queries. The post provides solutions, including sorting in Ruby and defining dedicated relation methods to preserve eager loading efficiency. Aimed at Rails developers, it offers practical advice for avoiding performance pitfalls in production.

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#Ruby On Rails #Rail #Activerecord