product_v2.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;
use Money;

class Product extends Model
{

  protected $fillable => [
    'name',
    'price',
    'currency'
  ]
  
  public function setPriceAttribute($price)
  {
    $this->attributes['price'] = new Money($price, $this->currency);
  }
}