Bundle doesn't support port configuration by environment variable

[zluiten]

When configuring the metadata_cache_driver section to use environment variables for the port configuration

doctrine_mongodb:
    document_managers:
        default:
            metadata_cache_driver:
                type: memcached
                class: Doctrine\Common\Cache\MemcachedCache
                instance_class: Memcached
                host: '%env(DOCTRINE_MONGODB_CACHE_HOST)%'
                port: '%env(int:DOCTRINE_MONGODB_CACHE_PORT)%'

It'll fail building the container with the exception

In IntegerNode.php line 29:

  Invalid type for path "doctrine_mongodb.document_managers.default.metadata_cache_driver.port". Expected int, but got string.

This makes sense because the port configuration should be an integer as it is configured as an IntegerNode. This is therefore not going to work because the placeholder value is being a string.

I would propose to change the port node to be of type ScalarNode, that would also be consistent with the DBAL configuration section which accepts the port to be scalar as well which you can check here: https://github.com/doctrine/DoctrineBundle/blob/master/DependencyInjection/Configuration.php#L192

[stof]

Which version of Symfony are you using ? This should be solved by Symfony 4.1 without having to remove the validation for all others

[zluiten]

Ah, yes, we're still on the (latest) 3.4... I guess back porting the fix would solve the issue here. Not sure if that can be done while keeping BC

[alcaeus]

TBF, I would prefer keeping it as an integerNode - a port is a number by definition; changing it to a scalarNode seems like an ugly workaround. What would be your suggestion @stof?

[jmikola]

I concur that this looks odd. I would expect %env()% to be evaluated before the configuration is validated; otherwise, there isn't much point to type validation.

The relevant change in Symfony 4.1 appears to be symfony/symfony#23888.

[stale]

This issue has been automatically marked as stale because it has not had any recent activity. It will be closed in a week if no further activity occurs. Thank you for your contributions.

[alcaeus]

Can someone from @doctrine/team-symfony-integration shed some light on this? I'd expect %env()% to be resolved before types are checked 🤔

[xabbuh]

Does it work with Symfony 4.1 (I guess this requires symfony/symfony#23888).

[alcaeus]

Just tested the following config with Symfony 4.2, with no luck:

$config = [
    'document_managers' => [
        'dm1' => [
            'metadata_cache_driver' => [
                'type'           => 'memcached',
                'class'          => 'fooClass',
                'host'           => 'host_val',
                'port'           => '%env(MEMCACHE_PORT)%',
                'instance_class' => 'instance_val',
            ],
        ],
    ],
];

A look at DoctrineBundle shows that they also use scalarNode for ports, but it seems like a dirty workaround...

[zluiten]

Yep, @symfony should backport symfony/symfony#23888 to 3.4

[alcaeus]

And what good does that do when it doesn't work in 4.2 either? 🤔

[zluiten]

@alcaeus Ah, but I think it should work with '%env(int:MEMCACHE_PORT)%', when specifying "type casting"