Symfony SonataAdmin类中的条令访问

我与额外字段有多对多的关联。在本教程之后，我解决了一个新实体和两个一对多关系：

会议-->会议联系人我找到了一个解决方案：

class MeetingAdmin extends AbstractAdmin
{
    public $arrProfiles;

    protected function configureFormFields(FormMapper $formMapper)
    {

         $this->arrProfiles = $this->getConfigurationPool()->getContainer()->get('doctrine')->getManager()->getRepository('AppBundle:Contact')->findProfile();

 ...

然后在模板中，我可以访问阵列：

{{admin.arrProfiles}}

$em = $this->getConfigurationPool()->getContainer()->get('Doctrine')->getManager()

sonata.admin.contact:
    class: AppBundle\Admin\ContactAdmin
    tags:
        - { name: sonata.admin, manager_type: orm, group: "Content", label: "Contacts" }
    arguments:
        - ~
        - AppBundle\Entity\Contact
        - ~
        - @doctrine.orm.default_entity_manager

    calls:
        - [ setTranslationDomain, [AppBundle]]

class MeetingAdmin extends AbstractAdmin
{
    public $arrProfiles;

    protected function configureFormFields(FormMapper $formMapper)
    {

         $this->arrProfiles = $this->getConfigurationPool()->getContainer()->get('doctrine')->getManager()->getRepository('AppBundle:Contact')->findProfile();

 ...

{{admin.arrProfiles}}