nihonbuzz-academy/app/Models/Level.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Concerns\HasUuids;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Level extends Model
{
    use HasFactory, HasUuids;

    protected $guarded = [];

    public function courses(): \Illuminate\Database\Eloquent\Relations\HasMany
    {
        return $this->hasMany(Course::class);
    }

    public function vocabularies(): \Illuminate\Database\Eloquent\Relations\HasMany
    {
        return $this->hasMany(Vocabulary::class);
    }
}