How to Detect and Fix the N+1 Query Problem in Laravel Eloquent

The N+1 problem is a common performance issue in Laravel Eloquent applications where a single page request triggers hundreds of redundant database queries instead of just one. For example, loading 100 blog posts and accessing each post's author inside a loop generates 101 queries, scaling catastrophically in production. Laravel offers built-in detection via Model::preventLazyLoading(), which throws an exception during development whenever a relationship is lazily loaded. Developers can also use DB::enableQueryLog() for manual inspection or install the beyondcode/laravel-query-detector package for passive, real-time monitoring. The primary fix is eager loading with Eloquent's with() method, which consolidates per-record queries into a single IN clause, reducing 101 queries down to just 2.