Form submission without relations set in exchangeArray

gistfile1.txt

        $builder = new AnnotationBuilder();
        $form = $builder->createForm($test);
...
        $form->get('testResult')->setValueOptions(
            $this->doctrineSelectOptions(
                'DbLoadCd\Entity\TestResult',
                [],
                ['name' => 'ASC'],
                ['Application\Service\Security', 'view']
            )
        );

        if ($this->getRequest()->isPost()) {
            $form->setData($this->getRequest()->getPost()->toArray());
            $form->setUseInputFilterDefaults(false);
            $form->setInputFilter($test->getInputFilter());

            if ($form->isValid()) {

                $test->setProject($project);
                $test->setOwner($em->getRepository('AppleConnect\Entity\User')->find($form->getData()['owner']));
                $test->setOperator($em->getRepository('AppleConnect\Entity\User')->find($form->getData()['operator']));
                $test->setTestType($em->getRepository('DbLoadCd\Entity\TestType')->find($form->getData()['testType']));
                $test->setTestStatus($em->getRepository('DbLoadCd\Entity\TestStatus')->find($form->getData()['testStatus']));
                $test->setTestResult($em->getRepository('DbLoadCd\Entity\TestResult')->find($form->getData()['testResult']));

                $test->exchangeArray($form->getData());