Enable MongoDB in symfony2

AppKernel.php

public function init() {
        parent::init();

        if ($this->debug) {
            // Disable deprecated warnings so Doctrine\MongoDB will work
            error_reporting(E_ALL & ~E_DEPRECATED );
        }
    }


public function registerBundles()
{
    $bundles = array(
        // ...
        new Doctrine\Bundle\MongoDBBundle\DoctrineMongoDBBundle(),
    );

    // ...
}

autoload.php

use Doctrine\ODM\MongoDB\Mapping\Driver\AnnotationDriver;
AnnotationDriver::registerAnnotationClasses();

composer.json

{
    "require": {
        "doctrine/mongodb-odm-bundle": "3.0.*"
    },
    "minimum-stability": "dev"
}

config.yml

doctrine_mongodb:
    connections:
        default:
            server: mongodb://localhost:27017
            options: {}
    default_database: test_database
    document_managers:
        default:
            auto_mapping: true