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问题:
I have 2 Entities - User and Group. They have a many-to-many relationship and Group is used to store a users' roles.
I'm trying to make a User edit form by adding a collection, I want to be able to add a new role by selecting it from a dropdown (limited to what's already in the DB)
UserType.php:
class UserType extends AbstractType { public function buildForm(FormBuilderInterface $builder, array $options) { $builder ->add('username') ->add('email') ->add('forename') ->add('surname') ->add('isActive') ->add('joinDate', 'date', array('input' => 'datetime', 'format' => 'dd-MM-yyyy')) ->add('lastActive', 'date', array('input' => 'datetime', 'format' => 'dd-MM-yyyy')) ->add('groups', 'collection', array( 'type' => new GroupType(), 'allow_add' => true, )) ; } public function setDefaultOptions(OptionsResolverInterface $resolver) { $resolver->setDefaults(array( 'data_class' => 'Sfox\CoreBundle\Entity\User' )); } }
and GroupType.php:
class GroupType extends AbstractType { public function buildForm(FormBuilderInterface $builder, array $options) { $builder ->add('name') ->add('role'); } public function setDefaultOptions(OptionsResolverInterface $resolver) { $resolver->setDefaults(array( "data_class" => 'Sfox\CoreBundle\Entity\Group' )); } }
This displays the roles in the form in basic text boxes, but if I add an entry to the form, it will cascade persist a new entry into Groups and if I were to edit an entry, it would change the underlying Group data.
I tried making a GroupSelectType.php:
class GroupSelectType extends AbstractType { public function buildForm(FormBuilderInterface $builder, array $options) { $builder ->add('role', 'entity', array('class'=>'SfoxCoreBundle:Group', 'property'=>'name')); } public function setDefaultOptions(OptionsResolverInterface $resolver) { $resolver->setDefaults(array( "data_class" => 'Sfox\CoreBundle\Entity\Group' )); } }
Adding the field as an "entity" type, this displays the correct select box (but with the default values) I cant seem to bind it to the UserType form!
All I want the form to do is modify the underlying 'groups' ArrayCollection in the User entity.
Does anyone know how I can achieve this?
回答1:
Well I worked out a solution for anyone else struggling with similar problems...
I had to create a custom form type and declare it as a service so I could pass in the Entity Manager. I then needed to make a dataTransformer to change my group objects into an integer for the form
Custom GroupSelectType:
class GroupSelectType extends AbstractType { /** * @var ObjectManager */ private $om; private $choices; /** * @param ObjectManager $om */ public function __construct(ObjectManager $om) { $this->om = $om; // Build our choices array from the database $groups = $om->getRepository('SfoxCoreBundle:Group')->findAll(); foreach ($groups as $group) { // choices[key] = label $this->choices[$group->getId()] = $group->getName() . " [". $group->getRole() ."]"; } } public function buildForm(FormBuilderInterface $builder, array $options) { $transformer = new GroupToNumberTransformer($this->om); $builder->addModelTransformer($transformer); } public function setDefaultOptions(OptionsResolverInterface $resolver) { $resolver->setDefaults(array( "choices" => $this->choices, )); } public function getParent() { return 'choice'; } public function getName() { return 'group_select'; } }
In the constructor I'm getting all available groups and putting them into a "choices" array which is passed to the select box as an option.
You'll also notice I'm using a custom data transformer, this is to change the groupId (which is used in the rendering of the form) to a Group entity. I made the GroupSelectType a service as well and passed in the [@doctrine.orm.entity_manager]
services.yml (bundle config):
services: sfox_core.type.group_select: class: Sfox\CoreBundle\Form\Type\GroupSelectType arguments: [@doctrine.orm.entity_manager] tags: - { name: form.type, alias: group_select }
GroupToNumberTranformer.php
class GroupToNumberTransformer implements DataTransformerInterface { /** * @var ObjectManager */ private $om; /** * @param ObjectManager $om */ public function __construct(ObjectManager $om) { $this->om = $om; } /** * Transforms an object (group) to a string (number). * * @param Group|null $group * @return string */ public function transform($group) { if (null === $group) { return ""; } return $group->getId(); } /** * Transforms a string (number) to an object (group). * * @param string $number * @return Group|null * @throws TransformationFailedException if object (group) is not found. */ public function reverseTransform($number) { if (!$number) { return null; } $group = $this->om ->getRepository('SfoxCoreBundle:Group') ->findOneBy(array('id' => $number)) ; if (null === $group) { throw new TransformationFailedException(sprintf( 'Group with ID "%s" does not exist!', $number )); } return $group; } }
And my modified UserType.php - Notice I'm using my custom form type "group_select" now as it's running as a service:
class UserType extends AbstractType { private $entityManager; public function __construct($entityManager) { $this->entityManager = $entityManager; } public function buildForm(FormBuilderInterface $builder, array $options) { $transformer = new GroupToNumberTransformer($this->entityManager); $builder ->add('username') ->add('email') ->add('forename') ->add('surname') ->add('isActive') ->add('joinDate', 'date', array('input' => 'datetime', 'format' => 'dd-MM-yyyy')) ->add('lastActive', 'date', array('input' => 'datetime', 'format' => 'dd-MM-yyyy')); $builder ->add( $builder->create('groups', 'collection', array( 'type' => 'group_select', 'allow_add' => true, 'options' => array( 'multiple' => false, 'expanded' => false, ) )) ); } public function setDefaultOptions(OptionsResolverInterface $resolver) { $resolver->setDefaults(array( 'data_class' => 'Sfox\CoreBundle\Entity\User' )); } public function getName() { return 'sfox_corebundle_usertype'; } }
