Laravel Eloquent Helper - Delete Cascade Relations

DeleteCascadeTrait.php

<?php

/**
 * Class DeleteCascadeTrait
 *
 * Simplify the process of delete cascade in eloquent. 
 *
 * use DeleteCascadeTrait;
 * public static function getDeleteCascadeRelations() { return array('myrelation'); }
 */
trait DeleteCascadeTrait
{
    /**
     * PHP does not like abstract static functions
     * http://stackoverflow.com/questions/999066/why-does-php-5-2-disallow-abstract-static-class-methods
     *
     * @return array
     */
    public static function getDeleteCascadeRelations()
    {
        return array();
    }

    public static function bootDeleteCascadeTrait()
    {
        static::deleting([static::class, "removeCascadeRelations"]);
    }

    final public static function removeCascadeRelations($obj)
    {
        foreach ($obj->getDeleteCascadeRelations() as $key) {
            foreach ($obj->$key()->get() as $relation) {
                if($relation) {
                    $relation->delete();
                }
            }
        }
    }
}

User.php

<?php
 
class User extends Eloquent
{
    use DeleteCascadeTrait;
    
    public static function getDeleteCascadeRelations()
    {
      return array('comments');
    }
    
    public function comments()
    {
      return $this->hasMany('Comment');
    }
  
}