refactor: update models relations

app/Models/Country.php

@@ -21,6 +21,7 @@ use Illuminate\Database\Eloquent\SoftDeletes;
  * @property Carbon $updated_at
  * @property string|null $deleted_at
  * 
+ * @property Collection|Airline[] $airlines
  * @property Collection|City[] $cities
  *
  * @package App\Models
@@ -40,6 +41,11 @@ class Country extends Model
 		'status'
 	];
 
+	public function airlines()
+	{
+		return $this->hasMany(Airline::class);
+	}
+
 	public function cities()
 	{
 		return $this->hasMany(City::class, 'county_id');