How can I write a symfony bundle which relies on Doctrine and provides entities?

Question

I am trying to write a mail-queue bundle for storing e-mail events into a location and retreive them later and process them, as we do not use a service like mandrill or likewise.

That for (and my exact usecase is not of real interest here), I like to provide additional entities in my bundle, as my bundle ships a BufferedDatabaseMailQueue.

Due to some research I included the following (yet untested) lines in the config.yml of my bundle:

doctrine:
orm:
    auto_mapping: false
    mappings:
       AcmeDemoBundle:
          type: annotation
          alias: MyMailQueueBundle
          prefix: MyMailQueueBundle\Entity
          dir: %kernel.root_dir%/../src/MyMailQueueBundle/Entity
          is_bundle: true

Anyways I end up with this error message:

InvalidArgumentException in YamlFileLoader.php line 404: There is no extension able to load the configuration for "doctrine"

Research indicated, that the PrependExtensionInterface might somehow help me. But I do not know how to correctly use and configure it. So that my Bundle can be based on doctrine.

How do I do that?

Answer 1

I managed it using this code:

<?php

namespace AltergearMailQueueBundle;

use Doctrine\Bundle\DoctrineBundle\DependencyInjection\Compiler\DoctrineOrmMappingsPass;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpKernel\Bundle\Bundle;
class MyMailQueueBundle extends Bundle
{
    public function build(ContainerBuilder $container)
    {
        /*
         * To extend the bundle to work with mongoDB and couchDB you can follow this tutorial
         * http://symfony.com/doc/current/doctrine/mapping_model_classes.html
         * */

        parent::build($container);
        $ormCompilerClass = 'Doctrine\Bundle\DoctrineBundle\DependencyInjection\Compiler\DoctrineOrmMappingsPass';

        if (class_exists($ormCompilerClass))
        {

            $namespaces = array( 'MyMailQueueBundle\Entity' );
            $directories = array( realpath(__DIR__.'/Entity') );
            $managerParameters = array();
            $enabledParameter = false;
            $aliasMap = array('MyMailQueueBundle' => 'MyMailQueueBundle\Entity');
            $container->addCompilerPass(
                DoctrineOrmMappingsPass::createAnnotationMappingDriver(
                        $namespaces,
                        $directories,
                        $managerParameters,
                        $enabledParameter,
                        $aliasMap
                )
            );
        }


    }
}