Laravel 9 Using Eloquent Relationships - How to Eager Load Nested Relationships Efficiently?
I recently switched to I'm currently working on a Laravel 9 application and I'm running into performance optimization when trying to retrieve nested relationships using Eloquent... I have a `Post` model that has a `belongsTo` relationship with `User` and a `hasMany` relationship with `Comment`. When I try to eager load the comments along with the user, the query takes a important amount of time, especially with a large dataset. Here's my code: ```php $posts = Post::with(['user', 'comments'])->get(); ``` This retrieves all the posts along with their associated users and comments, but the query generated is quite heavy. I noticed that with a large number of posts, it results in multiple SQL queries being executed, which is impacting performance. I’ve also tried limiting the number of comments returned by using a subquery: ```php $posts = Post::with(['user', 'comments' => function ($query) { $query->limit(5); }])->get(); ``` While this reduces the number of comments retrieved per post, it doesn't seem to significantly improve the overall performance. I'm wondering if there are best practices or strategies to optimize this eager loading, particularly in terms of query efficiency. Are there any specific provisions in Laravel that can help in this scenario? Additionally, how can I cache the results effectively without complicating the structure? I also checked the Laravel debug bar, and I see that the total query count spikes up to 15-20 queries when fetching the posts, user, and comments, which seems excessive. Any insights on how to reduce this or any design patterns I should consider would be greatly appreciated! This issue appeared after updating to Php LTS. The stack includes Php and several other technologies. Is there a simpler solution I'm overlooking?