adrema/database/factories/Course/Models/CourseFactory.php

<?php

namespace Database\Factories\Course\Models;

use App\Course\Models\Course;
use Illuminate\Database\Eloquent\Factories\Factory;

/**
 * @extends Factory<Course>
 */
class CourseFactory extends Factory
{
    public $model = Course::class;

    /**
     * Define the model's default state.
     *
     * @return array<string, mixed>
     */
    public function definition()
    {
        return [
            'name' => $this->faker->words(5, true),
            'nami_id' => $this->faker->numberBetween(1111, 9999),
        ];
    }

    public function inNami(int $namiId): self
    {
        return $this->state(['nami_id' => $namiId]);
    }
}