In this episode, we tackle a super common development challenge: how to handle nested data structures (like categories) in Laravel. Whether it's building out a list of categories and subcategories, blog comments, or any other infinitely nestable items, the usual approaches in Laravel can get messy and inefficient fast.
We start by looking at the classic setup—using a parent_id
column to link categories and eager loading children in our blade files. Quickly, though, you’ll see this doesn't scale: every nesting level requires more queries and more loops in your Blade views, which isn't great for performance or maintainability.
To solve this, we bring in the awesome Laravel Adjacency List package. With just a little set up, this package takes over the heavy lifting using SQL common table expressions, so you can get your entire tree structure out of the database in one query—no matter how deep the nesting goes.
We then build a recursive Blade component that elegantly renders our tree, no matter how complex the nesting becomes. The template stays clean, and adding new nested categories works seamlessly.
By the end of the video, you'll know how to set up scalable, maintainable, and lightning-fast nested categories (or any nested data) in Laravel, and have a reusable pattern you can drop into your projects whenever you need it!