ifnex/04_Laravel/app/Models/Country.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;

class Country extends Model
{
    protected $fillable = [
        'name',
        'iso_code',
        'export_zone_parcel',
        'export_zone_doc',
        'import_zone_parcel',
        'import_zone_doc',
        'is_active',
    ];

    protected function casts(): array
    {
        return [
            'is_active' => 'boolean',
        ];
    }

    public function fromShipments(): HasMany
    {
        return $this->hasMany(Shipment::class, 'from_country_id');
    }

    public function toShipments(): HasMany
    {
        return $this->hasMany(Shipment::class, 'to_country_id');
    }
}