Get an abstract defined service from an alias

[jmleroux]

When you want to get a service leading to to an abstract factory from an alias.

I ended up with this issue when trying to get a cache instance wich i defined in my configuration :

return array(
    'service_manager' => array(
        'abstract_factories' => array(
            'Zend\Cache\Service\StorageCacheAbstractServiceFactory',
        ),
        'aliases' => array (
            'app_cache' => 'memcached',
        ),
    ),
    'caches' => array(
        'memcached' => array(
            'adapter' => array(
                'name' => 'memcached',
                // other config values...
            ),
        ),
    ),
)

The purpose is to be able to change the cache by changing the alias.

Without this PR, ZF try to create this service :

$this->canCreateFromAbstractFactory('memcached', 'cache_core');

but 'cache_core' is not a cache configuration key.

[blanchonvincent]

Hey @jmleroux, can you provide unit tests ?

[jmleroux]

I can't run ServiceManager test group.
I can run all groups, but it's a bit long to run to validate my tests.

How can i run ServiceManager group ?

My try :

php run-tests.php -g ZendTest/ServiceManager

[jmleroux]

Note : we would not have this problem without the $name in the method canCreateServiceWithName
see #5755

[Ocramius]

This is not supported. I simply disallow service aliases for DoctrineModule's services, for example.

This is fixed with #5500 and won't land in 2.x

[jmleroux]

OK, i'll do without.
I there a link available to an article or discussion explaining why removing aliases ?

I used them a few times and found them useful

[Ocramius]

@jmleroux not removing them, just pushing them out as "non-core" feature - they work exactly like before

Aliases and normalization make work for abstract factories a real pain. The combination of the two is even worse :-)

[jmleroux]

OK for ZF3.

But my fix is a simple one and makes aliases work with abstract factory.
Why not considering it until the release of ZF3 ?

[jmleroux]

I see that the problem has already been raised : #5535
But my fix is way more simple.

[Ocramius]

Indeed, this solution is way simpler

[jmleroux]

ping @Ocramius
Some news about this PR ?
Just to know if I can rely on "aliased abstract factories" before ZF3 ?

[Ocramius]

@jmleroux the PR looks good to me

[jmleroux]

Any change to see it merged ?