spy30/database/seeds/DatabaseSeeder.php

<?php

use Illuminate\Database\Seeder;

class DatabaseSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
      $this->call(DocumentSeeder::class);
      $this->call(TransitCenterSeeder::class);
      $this->call(TransitLineSeeder::class);
      $this->call(MissionSeeder::class);
    }
}