Symfony2 Dynamic Form Modification not saving generated data - symfony

Question

I'm going crazy because if I choose a client from an entity field, it correctly populate the second entity field called proposals. Then I choose the proposal dynamically generated, but when I save the form it saves the form correctly but without filling the proposal field. I followed the Symfony Tutorial about the Dynamic Forms which can be found here
This is my FormType code:
public function buildForm(FormBuilderInterface $builder, array $options) {
$builder->add('client', 'entity', array(
'class' => 'AppBundle\Entity\Client',
'property' => 'name',
'label' => 'Client:',
'empty_value' => '',
'required' => false,
'query_builder' => function (EntityRepository $er) {
return $er->createQueryBuilder('u')
->orderBy('u.name', 'ASC');
},
));
$formModifier = function (FormInterface $form, Client $client = null) {
$proposals = null === $client ? array() : $this->em->getRepository('AppBundle:Proposals')->findBy(
array('client'=>$client->getId()),
array('id' => 'DESC'));
$form->add('proposal', 'entity', array(
'class' => 'AppBundle\Entity\Proposal',
'choice_label' => 'subject',
'placeholder' => '',
'choices' => $proposals,
'label' => 'Proposal',
'required' => false
));
};
$builder->addEventListener(
FormEvents::PRE_SET_DATA,
function (FormEvent $event) use ($formModifier) {
$client = null;
$data = $event->getData();
if(!empty($data)) {
$client = $data->getClient();
}
$formModifier($event->getForm(), $client );
}
);
$builder->get('client')->addEventListener(
FormEvents::POST_SUBMIT,
function (FormEvent $event) use ($formModifier) {
$client = $event->getForm()->getData();
$formModifier($event->getForm()->getParent(), $client);
}
);
This is the Prenotazione Entity, the one who belong the form.
class Prenotazione {
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #ORM\ManyToOne(targetEntity="Client", inversedBy="prenotazioni")
* #ORM\JoinColumn(name="client_id", referencedColumnName="id")
*/
private $client;
/**
* #ORM\OneToOne(targetEntity="Proposal", inversedBy="prenotazione")
* #ORM\JoinColumn(name="proposal_id", referencedColumnName="id")
*/
private $proposal;
public function getId() {
return $this->id;
}
public function setProposal(\AppBundle\Entity\Proposal $proposal = null)
{
$this->proposal = $proposal;
return $this;
}
public function getProposal() {
return $this->proposal;
}
public function setClient(\AppBundle\Entity\Client $client = null)
{
$this->client = $client;
return $this;
}
public function getClient()
{
return $this->client;
}
}
Where am I wrong ?

Answer 1

Are you sure your proposals query is correct?
$proposals = null === $client ? array() : $this->em->getRepository('AppBundle:Proposals')->findBy(
array('client'=>$client->getId()),
array('id' => 'DESC'));
Shouldn't this be either array('client_id' => $client->getId()), or array('client' => $client),?
Try checking the actual content of $proposals by adding a dump($proposals) just below and looking up the result in the symfony profiler.