Fatal error: Call to a member function getMetadataFactory() on a non-object

[gavinwilliams]

I'm trying to create a new admin section in Sonata admin. I have a model with XML mapping and am passing it to the admin service with the following XML.

    <services>

        <service id="application.menu.admin.menu" class="Application\MenuBundle\Admin\MenuAdmin">
            <tag name="sonata.admin" manager_type="orm" group="Menu" label="Menu" />
            <argument />
            <argument>Application\MenuBundle\Entity\Menu</argument>
            <argument>SonataAdminBundle:CRUD</argument>
            <call method="setTranslationDomain">
                <argument>Menu Admin</argument>
            </call>
        </service>

    </services>

When I attempt to view the page in SonataAdmin I get the following error.

Fatal error: Call to a member function getMetadataFactory() on a non-object in /vagrant/vendor/bundles/Sonata/DoctrineORMAdminBundle/Model/ModelManager.php on line 53

I've cleared the cache and this happens in the dev environment.

Any help would be greatly appreciated.

[gavinwilliams]

Never mind, found it. It should be clear somewhere in the documentation that if you create a new bundle, you need to add

doctrine:
    orm:
        entity_managers:
            default:
                mappings:
                    YourBundleName: ~

To your configuration file in order for SonataAdmin to make use of the getEntityManagerForClass method for multiple entity managers.