ZF2 multi-select form preselect values ManyToMany - php

Question

I can't get to preselect values in a multiselect form element representing a many to many relation.
In my model $admin I have the proper data : an ArrayCollection containing the correct CampsTypes but in the form I can't get the multiselect to preselect the proper options.
Admins model
/**
* #var ArrayCollection CampsTypes $campstypes
*
* #ORM\ManyToMany(targetEntity="CampsTypes", inversedBy="admins", cascade={"persist"})
* #ORM\JoinTable(name="campstypes_admins",
* joinColumns={#ORM\JoinColumn(name="admins_id", referencedColumnName="id")},
* inverseJoinColumns={#ORM\JoinColumn(name="campstypes_id", referencedColumnName="id")}
* )
*/
private $campstypes;
CampsType model
/**
* #var ArrayCollection Admins $admins
*
* #ORM\ManyToMany(targetEntity="Admins", mappedBy="campstypes", cascade={"persist"})
*/
private $admins;
Then I define my form select element as follow
[
'type' => 'DoctrineModule\Form\Element\ObjectSelect',
'name' => 'campTypes',
'required' => false,
'options' => [
'object_manager' => $this->getServiceLocator()->get(EntityManager::class),
'target_class' => CampsTypes::class,
'property' => 'title',
'label' => 'Type de camps autorisés',
'instructions' => 'Ne rien sélectionner si edition d\'un super admin',
],
'attributes' => [
'class' => '',
'multiple' => 'multiple',
]
],
And finally here is my action to receive the form
protected function saveAdmin(Admins &$admin, &$form, &$msg)
{
$em = $this->getEntityManager();
/** #var CampTypesService $serviceCampTypes */
$serviceCampTypes = $this->getServiceLocator()->get(CampTypesService::class);
$form->bind($admin);
if ($this->getRequest()->isPost()) {
$data = $this->getRequest()->getPost();
if (empty($data['password'])) {
$form->remove('password');
}
$form->setData($data);
if ($form->isValid()) {
if (isset($data['campTypes'])) {
$ids = $form->get('campTypes')->getValue();
$campsTypes = new ArrayCollection($serviceCampTypes->getCampTypesByIds(array_values($ids)));
foreach ($campsTypes as &$campsType) {
/** #var CampsTypes $campsType*/
$campsType->addAdmin($admin);
}
$admin->setCampTypes($campsTypes);
}
$em->persist($admin);
$em->flush();
$msg = 'Sauvegarde des données effectuée';
return;
}
}
return;
}
I'm getting out of solution to try.
Any idea what I am doing wrong ?

Answer 1

Have you read this ? I have the feeling you're looking for the ObjectMultiCheckbox instead of the ObjectSelect Form Element.
Examples from my own code
Usage for a single select (use case: set/change a default currency for some other entity)
$this->add([
'type' => ObjectSelect::class,
'required' => true,
'name' => 'defaultCurrency',
'options' => [
'object_manager' => $this->getEntityManager(),
'target_class' => Currency::class,
'property' => 'id',
// Use these commented lines if you wish to use a Repository function ('name' => 'repositoryFunctionName')
// 'is_method' => true,
// 'find_method' => [
// 'name' => 'getEnabledCurrencies',
// ],
'display_empty_item' => true,
'empty_item_label' => '---',
'label' => _('Default currency'),
'label_attributes' => [
'class' => '',
'title' => _('Default currency'),
],
'label_generator' => function ($targetEntity) {
/** #var Currency $targetEntity */
return $targetEntity->getName(); // Generates option text based on name property of Entity (Currency in this case)
},
],
]);
Usage for multiple select (Use case: add/remove (multiple) roles to/from user)
$this->add([
'name' => 'roles',
'required' => false,
'type' => ObjectMultiCheckbox::class,
'options' => [
'object_manager' => $this->getEntityManager(),
'target_class' => Role::class,
'property' => 'id',
'display_empty_item' => true,
'empty_item_label' => '---',
'label' => _('Roles'),
'label_generator' => function ($targetEntity) {
/** #var Role $targetEntity */
return $targetEntity->getName();
},
],
]);
As a side note: you should really use factories more. I see you using the ServiceLocator throughout your class code, you can avoid that by injecting your needs via a Factory.
If you need more information, I suggest you have a look at a bunch of my past questions as well. I had quite a few, starting out similar to what you're looking for. Managed to figure quite a few of them out on my own and have tried to describe the solutions in depth.

Answer 2

So I made it work !
basically my main problem is that I was not using proper Doctrine naming convention for the fields name of the form.
So I had to reverse engineer my DB into doctrine entities to compare with what I had done to understand where it was not working.
And also to set the model in both end (admins in camptype and camptypse in admin) for the whole shabang to work.
Here are the working classes :
Admin form:
[
'type' => ObjectSelect::class,
'name' => 'campstypes',
'required' => false,
'options' => [
'object_manager' => $this->getServiceLocator()->get(EntityManager::class),
'target_class' => CampsTypes::class,
'property' => 'title',
'label' => 'Type de camps autorisés',
'instructions' => 'Ne rien sélectionner si edition d\'un super admin',
],
'attributes' => [
'class' => '',
'multiple' => 'multiple',
]
],
Admin Controller:
protected function saveAdmin(Admins &$admin, &$form, &$msg)
{
$em = $this->getEntityManager();
/** #var CampTypesService $serviceCampTypes */
$serviceCampTypes = $this->getServiceLocator()->get(CampTypesService::class);
$form->bind($admin);
if ($this->getRequest()->isPost()) {
$data = $this->getRequest()->getPost();
if (empty($data['password'])) {
$form->remove('password');
}
$form->setData($data);
if ($form->isValid()) {
if (isset($data['campstypes'])) {
$ids = $form->get('campstypes')->getValue();
$campsTypes = new ArrayCollection($serviceCampTypes->getCampTypesByIds(array_values($ids)));
foreach ($campsTypes as &$campsType) {
/** #var CampsTypes $campsType*/
$campsType->addAdmin($admin);
}
$admin->setCampstypes($campsTypes);
}
$em->persist($admin);
$em->flush();
$msg = 'Sauvegarde des données effectuée';
return;
}
}
return;
}
So by renaming properly the fields of my form and models and setting the data in both end model of the relation I got it to work.