Objects are not persisted by Doctrine - php

Question

last couple of days I've been busy making a form using Doctrine and MongoDB. Companies should be able to reserve tables, chairs, .. at a certain event by use of this form. The snippet below shows the controller for this form.
The 'ObjectMap' object maps the amount of a certain object to the object itself. The controller creates all the 'ObjectMap' objects, and adds them to the company object. However, the 'ObjectMap' objects are persisted by Doctrine (they show up in the database) but the company object isn't modified at all, there is no database request made by MongoDB. The persist() function seems to have no effect at all.
public function logisticsAction(Company $company)
{
$form = $this->createForm(new LogisticsForm($this->getDoctrine()->getManager()), $company);
if ($this->getRequest()->isMethod('POST')) {
$form->bind($this->getRequest());
if ($form->isValid()) {
$formData = $this->getRequest()->request->get('_company_logistics_edit');
$objects = $this->getDoctrine()->getManager()
->getRepository('Jobfair\AppBundle\Document\Company\Logistics\Object')
->findAll();
foreach($objects as $object) {
$requirement = $formData['objectRequirement_'.$object->getId()];
$map = new ObjectMap($requirement, $object);
$this->getDoctrine()->getManager()->persist($map);
$company->addObjectMap($map);
//print_r($company->getObjectMaps());
}
$this->getDoctrine()->getManager()->persist($company);
$this->getDoctrine()->getManager()->flush();
$this->getRequest()->getSession()->getFlashBag()->add(
'success',
'The information was successfully updated!'
);
return $this->redirect(
$this->generateUrl(
'_company_settings_logistics',
array(
'company' => $company->getId(),
)
)
);
}
}
The Company object is defined here:
class Company{
/**
* #ODM\Id
*/
private $id;
/*
* #ODM\ReferenceMany(targetDocument="Jobfair\AppBundle\Document\Company\Logistics\ObjectMap", cascade={"persist", "remove"})
*/
private $objectMaps;
public function __construct($name = null, $description = null)
{
$this->objectMaps = new ArrayCollection();
}
public function getId()
{
return $this->id;
}
public function getObjectMaps()
{
return $this->objectMaps;
}
public function getObjectsArray()
{
$objects = array();
foreach($this->objectMaps as $map)
$objects[] = array(
'name' => $map->getObject()->getName(),
'amount' => $map->getRequirement()
);
return $objects;
}
public function addObjectMap(ObjectMapDocument $objectMap)
{
$this->objectMaps[] = $objectMap;
}
public function removeObject(ObjectMapDocument $objectMap)
{
$this->objectMaps->removeElement($objectMap);
}
}