vendor/symfony/doctrine-bridge/Form/ChoiceList/IdReader.php line 77
<?php/** This file is part of the Symfony package.** (c) Fabien Potencier <fabien@symfony.com>** For the full copyright and license information, please view the LICENSE* file that was distributed with this source code.*/namespace Symfony\Bridge\Doctrine\Form\ChoiceList;use Doctrine\Persistence\Mapping\ClassMetadata;use Doctrine\Persistence\ObjectManager;use Symfony\Component\Form\Exception\RuntimeException;/*** A utility for reading object IDs.** @author Bernhard Schussek <bschussek@gmail.com>** @internal*/class IdReader{private ObjectManager $om;private ClassMetadata $classMetadata;private bool $singleId;private bool $intId;private string $idField;private ?self $associationIdReader = null;public function __construct(ObjectManager $om, ClassMetadata $classMetadata){$ids = $classMetadata->getIdentifierFieldNames();$idType = $classMetadata->getTypeOfField(current($ids));$this->om = $om;$this->classMetadata = $classMetadata;$this->singleId = 1 === \count($ids);$this->intId = $this->singleId && \in_array($idType, ['integer', 'smallint', 'bigint']);$this->idField = current($ids);// single field association are resolved, since the schema column could be an intif ($this->singleId && $classMetadata->hasAssociation($this->idField)) {$this->associationIdReader = new self($om, $om->getClassMetadata($classMetadata->getAssociationTargetClass($this->idField)));$this->singleId = $this->associationIdReader->isSingleId();$this->intId = $this->associationIdReader->isIntId();}}/*** Returns whether the class has a single-column ID.*/public function isSingleId(): bool{return $this->singleId;}/*** Returns whether the class has a single-column integer ID.*/public function isIntId(): bool{return $this->intId;}/*** Returns the ID value for an object.** This method assumes that the object has a single-column ID.*/public function getIdValue(object $object = null): string{if (!$object) {return '';}if (!$this->om->contains($object)) {throw new RuntimeException(sprintf('Entity of type "%s" passed to the choice field must be managed. Maybe you forget to persist it in the entity manager?', get_debug_type($object)));}$this->om->initializeObject($object);$idValue = current($this->classMetadata->getIdentifierValues($object));if ($this->associationIdReader) {$idValue = $this->associationIdReader->getIdValue($idValue);}return (string) $idValue;}/*** Returns the name of the ID field.** This method assumes that the object has a single-column ID.*/public function getIdField(): string{return $this->idField;}}