Create IConventions alias when the class does not exist

[ghost]

Version: 3.1.1

Bug Description

I would like to use Nette Database 3.1.1 in Symfony 5.2.3. My PHP version is 8.0.

When I try to create a database connection in a command I get the following error.

"The autoloader expected class "Nette\Database\IConventions" to be defined in file "/var/www/html/vendor/composer/../nette/database/src/compatibility-intf.php". The file was found but the class was not in it, the class name or namespace probably has a typo."

Steps To Reproduce

• Create a Symfony project
• Create a command
• Try to use Connection like in the following code

<?php

declare(strict_types=1);

namespace App\Command;

use Nette\Database\Connection;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Style\SymfonyStyle;

class TestCommand extends Command
{
    protected static $defaultName = 'app:test';
    protected static $defaultDescription = 'Add a short description for your command';

    protected function configure()
    {
        $this->setDescription(self::$defaultDescription);
    }

    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        $io = new SymfonyStyle($input, $output);

        $database = new Connection(
            'mysql:host=127.0.0.1;dbname=test',
            'test',
            'xxx'
        );

        return Command::SUCCESS;
    }
}

Possible Solution

As suggested on StackOverflow (https://stackoverflow.com/questions/66458897/nette-database-not-working-in-symfony-5-2-command) the IConventions alias in "compatibility-intf.php" should be created when the IConventions class does not exist, not when the ISupplementalDriver class does not exits.

So instead of

} elseif (!interface_exists(ISupplementalDriver::class)) {
    class_alias(Driver::class, ISupplementalDriver::class);
    class_alias(Conventions::class, IConventions::class);
}

it should be

if (!interface_exists(ISupplementalDriver::class)) {
    class_alias(Driver::class, ISupplementalDriver::class);
}

if (!interface_exists(IConventions::class)) {
    class_alias(Conventions::class, IConventions::class);
}

[dg]

Fixed