laravel:eloquent-relationships

To fix N+1 query issues in Laravel Eloquent, apply eager loading using the with() method to load relationships upfront. You can also use withCount() and withSum() to fetch aggregates efficiently without triggering extra queries per model.

Constrained eager loading in Laravel is done by passing a closure to the with() method to filter related models. You can also use whereHas() and has() to query based on relationship existence while applying specific conditions to the loaded relations.

The safest way to sync many-to-many pivot tables in Laravel is using syncWithoutDetaching(). This updates pivot data consistently without removing existing relationships, while sync() replaces the entire relationship set to maintain strict data consistency.

To handle large datasets with Laravel Eloquent without memory exhaustion, use chunking and lazy loading techniques. These methods process records in smaller batches, significantly reducing memory usage when retrieving and iterating through extensive relationship data.

Yes, you can apply global and local scopes to enforce recurring constraints on related Laravel queries. Scopes allow you to define common query restrictions that automatically apply to relationship loading, ensuring consistent data access across your application.