ErrorException array to string conversion on migrate --seed - php

Question

I'm trying to set up my very first laravel project however when I try to have artisan to seed the database with faker it throws
[errorException] array to string conversion
I'm just working with the stock users migration file
and using the command php artisan migrate --seed
Any guidance would be greatly appreciated
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class CreateUsersTable extends Migration
{
/**
* Run the migrations.
*
* #return void
*/
public function up()
{
Schema::create('users', function (Blueprint $table) {
$table->increments('id');
$table->string('name');
$table->string('email')->unique();
$table->string('password', 60);
$table->string('role', array('user', 'admin', 'superuser'));
$table->rememberToken();
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* #return void
*/
public function down()
{
Schema::drop('users');
}
}
and this UserTableSeeder that artisan generated for me
use Illuminate\Database\Seeder;
class UserTableSeeder extends Seeder
{
/**
* Run the database seeds.
*
* #return void
*/
public function run()
{
factory(App\User::class, 49)->create();
factory(App\User::class)->create([
'name' => 'admin',
'role' => 'admin',
]);
}
}
this is my Modelfactory.php
$factory->define(App\User::class, function ($faker) {
return [
'name' => $faker->name,
'email' => $faker->email,
'password' => str_random(10),
'remember_token' => str_random(10),
'role' => $faker->word->randomElement(array('user','superuser')),
];
});

Answer 1

$table->string('role', array('user', 'admin', 'superuser'));
You are selecting a type of string and then providing an array.
This is exactly what your error is talking about.

Answer 2

Your error is because of this line
$table->string('role', array('user', 'admin', 'superuser'));
change string to enum; ex:
$table->enum('role', array('user', 'admin', 'superuser'));
this will execute.

Answer 3

You say string but provide an array in this line:
$table->string('role', array('user', 'admin', 'superuser'));
You should use :
$table->enum('role', ['user', 'admin', 'superuser']);
For reference see here:
https://laravel.com/docs/5.8/migrations#creating-columns