no-db-constraints

To remove foreign key constraints in Laravel, you create drop migrations for already-run constraints or edit plan files directly. You then enforce these rules at the application level using Eloquent boot() hooks or dedicated Rule classes.

The best way to replace database unique constraints is to drop the unique indexes via migrations and implement model-level checks. You add boot() hooks for creating and updating events, using exists() to verify uniqueness while excluding the current model.

Yes, you can use Laravel boot() hooks to enforce uniqueness without database constraints. By adding creating and updating event listeners, you perform fast exists() checks to prevent duplicates, ensuring business rules remain in code rather than the database.

Handling drop migrations involves generating new migrations that specifically target and remove existing foreign keys and unique indexes. You can replace dropped unique constraints with plain indexes when beneficial for query performance while maintaining application checks.

Removing database-level constraints directly affects plan file workflows by allowing you to edit planned migration files to strip constraints before execution. For already-run migrations, you must generate separate drop migrations to alter the database schema safely.

You should use dedicated Rule classes instead of boot() hooks when dealing with complex constraints that need to be reused across different parts of your Laravel application. Boot() hooks are better suited for standard creation and updating uniqueness checks on a single model.