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merged 3 commits into from
Jun 21, 2012
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Override service and configuration #1457

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93d0c87
added documentation on how to extend bundle services
May 31, 2012
dd28f35
moved note to relevant section, added info on how to override a param…
Burgov Jun 14, 2012
fdbcd1d
information on how to use a compiler pass to override a service
Burgov Jun 16, 2012
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31 changes: 30 additions & 1 deletion cookbook/bundles/override.rst
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Expand Up @@ -35,7 +35,36 @@ inheritance. For more information, see :doc:`/cookbook/bundles/inheritance`.
Services & Configuration
------------------------

In progress...
In order to override/extend a service, there are two options. Firstly, you can
set the parameter holding the service's class name to your own class by setting
it in the config.yml. This of course is only possible if the class name is
defined as a parameter in the service config of the bundle containing the
service. Secondly, if this is not the case, or if you want to make sure the
class is always overridden when your bundle is used, you should use a compiler
pass:

.. code-block:: php
namespace Foo\BarBundle\DependencyInjection\Compiler;

use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
use Symfony\Component\DependencyInjection\ContainerBuilder;

class OverrideServiceCompilerPass implements CompilerPassInterface
{

public function process(ContainerBuilder $container)
{
$definition = $container->getDefinition('original-service-id');
$definition->setClass('Foo\BarBundle\YourService');
}
}

In this example we fetch the service definition of the original service, and set
it's class name to our own class.

See `/cookbook/service_container/compiler_passes` for information on how to use
compiler passes. If you want to do something beyond just overriding the class -
like adding a method call - You can only use the compiler pass method.

Entities & Entity mapping
-------------------------
Expand Down