Answers for "factory helper undefined laravel seeders"

php artisan db:seed Call to undefined method App\Models\Product::factory()

//When running: php artisan db:seed 
//Occurs de error: Call to undefined method App\Models\[YOUR_MODEL_NAME]::factory()

//Fix - Add the following line to your model "use HasFactory;"
class [YOUR_MODEL_NAME] extends Model
{
    use HasFactory;
  	//...
}

laravel override factory values in database seeder

namespace Database\Seeders;

use App\Models\Category;
use App\Models\Post;
use App\Models\User;
use Illuminate\Database\Seeder;

class DatabaseSeeder extends Seeder
{
    /**
     * Seed the application's database.
     *
     * @return void
     */
    public function run()
    {
        $users = User::factory(2)->create();
        $categories = Category::factory(3)->create();
        Post::factory(3)->create([
            'user_id' => $users[0]->id,
            'category_id' => $categories[0]->id
        ]);
        Post::factory(1)->create([
            'user_id' => $users[1]->id,
            'category_id' => $categories[0]->id
        ]);
    }
}