How Can I Automatically Delete Related Rows When Deleting a Model in Laravel Eloquent?

Implement Automatic Deletion of Related Rows in Laravel Using Eloquent ORM

Eloquent ORM's standard delete() method deletes a single row. To extend this functionality and automatically delete related rows, utilize Eloquent events.

Problem:
When you delete a row with $user->delete(), how can you attach an automatic callback to delete related rows, like $this->photo()->delete()?

Solution:

The deleting event is triggered before the delete() method is called. By defining an event handler within the model class, you can perform cleanup tasks upon deletion.

<?php

namespace App\Models;

use Illuminate\Foundation\Auth\User as Authenticatable;

class User extends Authenticatable
{
    public function photos()
    {
        return $this->has_many('Photo');
    }
    
    // This method is called before delete() is called
    protected static function booted () {
        static::deleting(function (User $user) {
            $user->photos()->delete();
        });
    }
}

Additional Notes:

• Using the booted method to declare event handlers is recommended.
• Consider wrapping the cleanup actions inside a transaction to maintain referential integrity.

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