Viewing file:  UniqueEntityValidator.php (5.02 KB) -rw-r--r--
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<?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\Validator\Constraints;
use Doctrine\Common\Persistence\ManagerRegistry;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\Exception\UnexpectedTypeException;
use Symfony\Component\Validator\Exception\ConstraintDefinitionException;
use Symfony\Component\Validator\ConstraintValidator;
/**
* Unique Entity Validator checks if one or a set of fields contain unique values.
*
* @author Benjamin Eberlei <kontakt@beberlei.de>
*/
class UniqueEntityValidator extends ConstraintValidator
{
/**
* @var ManagerRegistry
*/
private $registry;
/**
* @param ManagerRegistry $registry
*/
public function __construct(ManagerRegistry $registry)
{
$this->registry = $registry;
}
/**
* @param object $entity
* @param Constraint $constraint
*
* @throws UnexpectedTypeException
* @throws ConstraintDefinitionException
*/
public function validate($entity, Constraint $constraint)
{
if (!is_array($constraint->fields) && !is_string($constraint->fields)) {
throw new UnexpectedTypeException($constraint->fields, 'array');
}
if (null !== $constraint->errorPath && !is_string($constraint->errorPath)) {
throw new UnexpectedTypeException($constraint->errorPath, 'string or null');
}
$fields = (array) $constraint->fields;
if (0 === count($fields)) {
throw new ConstraintDefinitionException('At least one field has to be specified.');
}
if ($constraint->em) {
$em = $this->registry->getManager($constraint->em);
if (!$em) {
throw new ConstraintDefinitionException(sprintf('Object manager "%s" does not exist.', $constraint->em));
}
} else {
$em = $this->registry->getManagerForClass(get_class($entity));
if (!$em) {
throw new ConstraintDefinitionException(sprintf('Unable to find the object manager associated with an entity of class "%s".', get_class($entity)));
}
}
$class = $em->getClassMetadata(get_class($entity));
/* @var $class \Doctrine\Common\Persistence\Mapping\ClassMetadata */
$criteria = array();
foreach ($fields as $fieldName) {
if (!$class->hasField($fieldName) && !$class->hasAssociation($fieldName)) {
throw new ConstraintDefinitionException(sprintf("The field '%s' is not mapped by Doctrine, so it cannot be validated for uniqueness.", $fieldName));
}
$criteria[$fieldName] = $class->reflFields[$fieldName]->getValue($entity);
if ($constraint->ignoreNull && null === $criteria[$fieldName]) {
return;
}
if (null !== $criteria[$fieldName] && $class->hasAssociation($fieldName)) {
/* Ensure the Proxy is initialized before using reflection to
* read its identifiers. This is necessary because the wrapped
* getter methods in the Proxy are being bypassed.
*/
$em->initializeObject($criteria[$fieldName]);
$relatedClass = $em->getClassMetadata($class->getAssociationTargetClass($fieldName));
$relatedId = $relatedClass->getIdentifierValues($criteria[$fieldName]);
if (count($relatedId) > 1) {
throw new ConstraintDefinitionException(
"Associated entities are not allowed to have more than one identifier field to be " .
"part of a unique constraint in: ".$class->getName()."#".$fieldName
);
}
$criteria[$fieldName] = array_pop($relatedId);
}
}
$repository = $em->getRepository(get_class($entity));
$result = $repository->{$constraint->repositoryMethod}($criteria);
/* If the result is a MongoCursor, it must be advanced to the first
* element. Rewinding should have no ill effect if $result is another
* iterator implementation.
*/
if ($result instanceof \Iterator) {
$result->rewind();
} elseif (is_array($result)) {
reset($result);
}
/* If no entity matched the query criteria or a single entity matched,
* which is the same as the entity being validated, the criteria is
* unique.
*/
if (0 === count($result) || (1 === count($result) && $entity === ($result instanceof \Iterator ? $result->current() : current($result)))) {
return;
}
$errorPath = null !== $constraint->errorPath ? $constraint->errorPath : $fields[0];
$this->context->addViolationAt($errorPath, $constraint->message, array(), $criteria[$fields[0]]);
}
}
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