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16905953
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2013-06-03T21:14:35.897
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2013-06-24T19:04:17.513
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This is the way I handle entities with hidden inputs: DataTransformer <pre><code><?php namespace Comakai\CQZBundle\Form\DataTransformer; use Symfony\Component\Form\DataTransformerInterface; use Symfony\Component\Form\Exception\TransformationFailedException; use Doctrine\Common\Persistence\ObjectManager; class EntityToIdTransformer implements DataTransformerInterface { /** * @var ObjectManager */ private $om; private $entityClass; /** * @param ObjectManager $om */ public function __construct(ObjectManager $om, $entityClass) { $this->om = $om; $this->entityClass = $entityClass; } /** * Transforms an object to a string (id). * * @param Object|null $entity * @return string */ public function transform($entity) { if (null === $entity) { return ""; } return $entity->getId(); } /** * Transforms a string (id) to an object. * * @param string $id * @return Object|null * @throws TransformationFailedException if object is not found. */ public function reverseTransform($id) { if (!$id) { return null; } $entity = $this->om->getRepository($this->entityClass)->findOneById($id); if (null === $entity) { throw new TransformationFailedException(sprintf( 'An entity of class ' . $this->entityClass . ' with id "%s" does not exist!', $id )); } return $entity; } } </code></pre> FormType <pre><code><?php namespace Comakai\CQZBundle\Form\Type; use Symfony\Component\Form\AbstractType; use Symfony\Component\Form\FormBuilderInterface; use Doctrine\Common\Persistence\ManagerRegistry; use Doctrine\Common\Persistence\ObjectManager; use Comakai\CQZBundle\Form\DataTransformer\EntityToIdTransformer; class EntityHiddenType extends AbstractType { /** * @var ManagerRegistry */ private $registry; /** * @var ObjectManager */ private $om; private $cache; /** * @param ObjectManager $om */ public function __construct(ManagerRegistry $registry) { $this->registry = $registry; $this->om = $registry->getManager(); $this->cache = []; } public function buildForm(FormBuilderInterface $builder, array $options) { $class = (empty($options['data_class'])) ? $this->getClassFromMetadata($builder->getName(), $builder->getParent()->getDataClass()) : $options['data_class']; $transformer = new EntityToIdTransformer($this->om, $class); $builder->addViewTransformer($transformer); $builder->setAttribute('data_class', $class); } public function getParent() { return 'hidden'; } public function getName() { return 'entity_hidden'; } protected function getClassFromMetadata($name, $parentClass) { /* @var $md \Doctrine\ORM\Mapping\ClassMetadata */ $md = $this->getMetadata($parentClass)[0]; $a = $md->getAssociationMapping($name); $class = $a['targetEntity']; return $class; } protected function getMetadata($class) { if (array_key_exists($class, $this->cache)) { return $this->cache[$class]; } $this->cache[$class] = null; foreach ($this->registry->getManagers() as $name => $em) { try { return $this->cache[$class] = array($em->getClassMetadata($class), $name); } catch (MappingException $e) { // not an entity or mapped super class } catch (LegacyMappingException $e) { // not an entity or mapped super class, using Doctrine ORM 2.2 } } } } </code></pre> Config (services.yml) <pre><code>services: cqz.form.type.entity_hidden: class: Comakai\CQZBundle\Form\Type\EntityHiddenType arguments: ["@doctrine"] tags: - { name: form.type, alias: entity_hidden } </code></pre> JobType <pre><code>$builder->add('company', 'entity_hidden'); </code></pre> Then in your controller <pre><code>$job = new \Niche\JobBundle\Entity\Job(); $type = new \Niche\JobBundle\Form\JobType(); $job->setCompany($businessUser); $form = $this->createForm($type, $job); </code></pre> This way you'll have a reusable entity_hidden type. UPDATE FOR 2.3 Since there is no $builder->getParent() anymore (<a href="https://github.com/symfony/symfony/blob/master/UPGRADE-2.2.md">https://github.com/symfony/symfony/blob/master/UPGRADE-2.2.md</a>) and because I don't want to set the class of the field's data, I came up with this (btw, now I'm using the form.type_guesser.doctrine service to get the class): Config <pre><code>cqz.form.type.suggest: class: Comakai\CQZBundle\Form\Type\SuggestType arguments: ["@doctrine.orm.entity_manager", "@form.type_guesser.doctrine"] </code></pre> DataTransformer <pre><code><?php namespace Comakai\CQZBundle\Form\DataTransformer; use Symfony\Component\Form\DataTransformerInterface; use Symfony\Component\Form\Exception\TransformationFailedException; use Doctrine\Common\Persistence\ObjectManager; class ObjectToIdTransformer implements DataTransformerInterface { /** * @var ObjectManager */ private $om; private $objectClass; /** * @param ObjectManager $om */ public function __construct(ObjectManager $om, $objectClass = null) { $this->om = $om; $this->objectClass = $objectClass; } /** * Transforms an object to an id. * * @param Object|null $object * @return mixed */ public function transform($object) { if (null === $object) { return ''; } return $object->getId(); } /** * Transforms an id to an object. * * @param mixed $id * * @return Object|null * * @throws TransformationFailedException if object is not found. */ public function reverseTransform($id) { if (!$id) { return null; } $object = $this->om ->getRepository($this->objectClass) ->find($id) ; if (null === $object) { throw new TransformationFailedException(sprintf( 'An instance of "%s" with id "%s" does not exist!', $this->objectClass, $id )); } return $object; } public function getObjectClass() { return $this->objectClass; } public function setObjectClass($class) { $this->objectClass = $class; } } </code></pre> Type <pre><code><?php namespace Comakai\CQZBundle\Form\Type; use Symfony\Component\Form\AbstractType; use Symfony\Component\Form\FormBuilderInterface; use Doctrine\Common\Persistence\ObjectManager; use Symfony\Bridge\Doctrine\Form\DoctrineOrmTypeGuesser; use Symfony\Component\OptionsResolver\OptionsResolverInterface; use Comakai\CQZBundle\Form\DataTransformer\ObjectToIdTransformer; use Symfony\Component\Form\FormView; use Symfony\Component\Form\FormInterface; use Symfony\Component\Form\FormEvents; use Symfony\Component\Form\FormEvent; class SuggestType extends AbstractType { /** * @var ObjectManager */ private $om; private $guesser; /** * @param ObjectManager $om */ public function __construct(ObjectManager $om, DoctrineOrmTypeGuesser $guesser) { $this->om = $om; $this->guesser = $guesser; } public function buildForm(FormBuilderInterface $builder, array $options) { $transformer = new ObjectToIdTransformer($this->om); $builder->addModelTransformer($transformer); if($options['class'] === null) { $builder->addEventListener(FormEvents::PRE_SET_DATA, function(FormEvent $event) use ($transformer, $builder) { /* @var $form \Symfony\Component\Form\Form */ $form = $event->getForm(); $class = $form->getParent()->getConfig()->getDataClass(); $property = $form->getName(); $guessedType = $this->guesser->guessType($class, $property); $options = $guessedType->getOptions(); $transformer->setObjectClass($options['class']); }); } else { $transformer->setObjectClass($options['class']); } } ... </code></pre> I feel that using a PRE_SET_DATA to set the data class on the transformer is nasty, what do you think?
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