CityFactory

CityFactory.php

<?php

namespace Database\Factories;

use App\Models\City;
use App\Models\Country;
use App\Models\Region;
use Illuminate\Database\Eloquent\Factories\Factory;

class CityFactory extends Factory
{
    /**
     * The name of the factory's corresponding model.
     *
     * @var string
     */
    protected $model = City::class;

    /**
     * Define the model's default state.
     *
     * @return array
     */
    public function definition(): array
    {
        return [
            'name'      => $this->faker->city(),
            'code'      => $this->faker->numerify('###'),
            'latitude'  => $this->faker->latitude(),
            'longitude' => $this->faker->longitude(),
            'country_id' => Country::factory()->lazy(),
            'region_id'  => Region::factory()->lazy(),
        ];
    }

    public function country(null|int|Country $country): self
    {
        return $this->state(function (array $attributes) use ($country) {
            $country = $country === null
                ? Country::factory()->lazy()
                : ($country instanceof Country ? $country->id : $country);

            return ['country_id' => $country];
        });
    }

    public function region(null|int|Region $region): self
    {
        return $this->state(function (array $attributes) use ($region) {
            $country = $attributes['country_id'] ?? Country::factory()->lazy();

            $region = $region === null
                ? Region::factory()->lazy(['country_id' => $country])->id
                : ($region instanceof Region ? $region->id : $region);

            return [
                'region_id' => $region,
                'country_id' => $country,
            ];
        });
    }
}