Laravel 5.3 db:seed command simply doesn't work

I do everything by-the-book:

1. Installed fresh Laravel 5.3.9 app (all my non-fresh apps produce the same error)

2. run php artisan make:auth

3. create migrations for a new table `php artisan make:migration create_quotations_table --create=quotations

   Schema::create('quotations', function (Blueprint $table) {
       $table->increments('id');
   
       $table->string('text');
   
       // my problem persists even with the below two columns commented out
       $table->integer('creator_id')->unsigned()->index('creator_id');
       $table->integer('updater_id')->unsigned()->index('updater_id');
   
       $table->softDeletes();
       $table->timestamps();
   });
   

4. Then I run php artisan migrate

5. Then I define a new seed php artisan make:seeder QuotationsTableSeeder

The complete content of the file, after I add a simple insert:

<?php

use Illuminate\Database\Seeder;

class QuotationsTableSeeder extends Seeder
{
/**
 * Run the database seeds.
 *
 * @return void
 */
public function run()
{
    DB::table('quotations')->insert([
        'text' => str_random(10),

    ]);
}
}

6. Then I run php artisan db:seed

problem

it simply doesn't work. No feedback presented, no errors in log file. The probem persists in both my local environment (Win7, newest WAMP server) and my Digital Ocean VPS powered by Ubuntu 16.04. All the above steps I took in several separate apps - for no result. Also under Laragon 2.0.5 server.

what I have tried

php artisan optimize as suggested here.

composer dump-autoload i php artisan clear-compiled also have brought no results

I also tried to seed just following the official docs example - failed.

I added use DB; to the seed file - still no result.

to do

help!!! How come they don't work?

Are you calling your seeder inside the DatabaseSeeder class? This way:

database/seeds/DatabaseSeeder.php

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

Or, add the --class option when using the php artisan db:seed command, this way:

php artisan db:seed --class="QuotationTableSeeder"

After creating or removing your seeders, don't forget to run the following command:

composer dump-autoload