How to filter by parent document in SonataAdmin Doctrine2 PHPCR Admin

It is my first simple project on SymfonyCMF. In my project i have a lot of 'profile' documents(in term of phpcr). Each profile belongs to specific 'department'(parent document). (In phpcr each document must have parent document.) In admin panel (SonataAdmin) i can list all 'profiles' using configureListFields function. I can filter them by 'profile' properties using configureDatagridFilters function. But, cant figure out how to filter 'profile' by its parent 'department' document.

        protected function configureDatagridFilters(DatagridMapper $datagridMapper)
    {
        $datagridMapper
            ->add('name','doctrine_phpcr_string')
            ->add('title', 'doctrine_phpcr_string')
            ->add('parent') <--- Need to filter  by parent !
          ;
    }

Tried to implement custom callback filter function from SonataAdmin documentation:

    protected function configureDatagridFilters(DatagridMapper $datagridMapper)
    {
        $datagridMapper

            ->add('parent', 'doctrine_phpcr_callback', array(
                'callback' => function($queryBuilder, $alias, $field, $data) {
                    if (!$data || !is_array($data) || !array_key_exists('value', $data)) {
                        return;
                    }

                    $queryBuilder = $proxyQuery->getQueryBuilder();
                    $eb = $queryBuilder->expr();

                    $queryBuilder->andWhere($eb->eq($field, $data['value']));

                    return true;
                },
                'field_type' => 'checkbox'
            ))
        ;
    }

But, first i got an error related to $proxyQuery, $queryBuilder->expr(). Second i have no idea how to properly query and filter by parent ((. Thanx in advance.

SOLVED thanx to @Bilel Noômene The final answer is

    protected function configureDatagridFilters(DatagridMapper $datagridMapper)
{

    $datagridMapper->add('parent', 'doctrine_phpcr_callback', array('callback' =>
        function ($proxyQuery, $alias, $field, $data) {
            if (!$data || !is_array($data) || !array_key_exists('value', $data) || !$data['value']) {
                return;
            }


            $queryBuilder = $proxyQuery->getQueryBuilder();

            $queryBuilder->from($alias)
                ->joinInner()
                ->left()->document(Profile::class, $alias)->end()
                ->right()->document(Department::class, 'd')->end()
                ->condition()->child($alias, 'd')->end();

            $queryBuilder->andWhere()->same($data['value']->getId(), 'd')->end();

            return true;
        }
    ), DocumentType::class, array('class'=>Department::class));

    parent::configureDatagridFilters($datagridMapper);
}

The example of the documentation doesn't seem to be working correctly. For your case, try this code.

public function configureDatagridFilters(DatagridMapper $datagridMapper)
{
    $datagridMapper->add('parent', 'doctrine_phpcr_callback', array('callback' =>
        function ($proxyQuery, $alias, $field, $data) {
            if (!$data || !is_array($data) || !array_key_exists('value', $data) || !$data['value']) {
                return;
            }

            $queryBuilder = $proxyQuery->getQueryBuilder();

            $queryBuilder->from($alias)
                ->joinInner()
                ->left()->document(Profile::class, $alias)->end()
                ->right()->document(Department::class, 'd')->end()
                ->condition()->child($alias, 'd')->end();
            $queryBuilder->andWhere()->same($data['value']->getId(), 'd')->end();

            return true;
        }
    ), 'phpcr_document', array('class' => Department::class));

    parent::configureDatagridFilters($datagridMapper);
}