ldc-legaulois/database/seeders/Development/SubrangeSeeder.php

<?php

namespace Database\Seeders\Development;

use App\Models\Range;
use App\Models\Subrange;
use Illuminate\Database\Seeder;

class SubrangeSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run(): void
    {
        foreach (Range::all() as $rangeModel) {
            // @phpstan-ignore-next-line
            Subrange::factory(5)->make()->each(function (Subrange $subrange) use ($rangeModel) {
                $subrange->range()->associate($rangeModel);
                $subrange->save();
            });
        }
    }
}