PHP
Optimize Eloquent Queries with Eager Loading (N+1 Problem)
Learn to prevent the N+1 query problem in Laravel Eloquent by using eager loading with `with()` to fetch related models efficiently and boost performance.
User::with('posts')->get();
// Or eager load specific columns from the related table
User::with('posts:id,title,user_id')->get();
// Nested eager loading for deeper relationships
Order::with('customer.address')->get();
// Conditional eager loading to filter related models
User::with(['posts' => function ($query) {
$query->where('published', true);
}])->get();
How it works: Eager loading is a critical technique to solve the N+1 query problem, which occurs when fetching a collection of models and then looping through them to access a related model, triggering a separate query for each iteration. By using `with()`, Eloquent fetches all related models in a single, more efficient query. This snippet demonstrates basic, column-specific, nested, and conditional eager loading, allowing you to optimize database interactions significantly.