/**
* Returns the values of the identifier fields of an entity.
*
* Doctrine must know about this entity, that is, the entity must already
* be persisted or added to the identity map before. Otherwise an
* exception is thrown.
*
* @param object $entity The entity for which to get the identifier
*
* @return array The identifier values
*
* @throws FormException If the entity does not exist in Doctrine's identity map
*/
private function getIdentifierValues($entity)
{
if (!$this->em->contains($entity)) {
throw new FormException('Entities passed to the choice field must be managed');
}
$this->em->initializeObject($entity);
return $this->classMetadata->getIdentifierValues($entity);
}
/**
* Returns the values of the identifier fields of an entity.
*
* Doctrine must know about this entity, that is, the entity must already
* be persisted or added to the identity map before. Otherwise an
* exception is thrown.
*
* @param object $entity The entity for which to get the identifier
*
* @return array The identifier values
*
* @throws RuntimeException If the entity does not exist in Doctrine's identity map
*/
private function getIdentifierValues($entity)
{
if (!$this->em->contains($entity)) {
throw new RuntimeException('Entities passed to the choice field must be managed. Maybe ' . 'persist them in the entity manager?');
}
$this->em->initializeObject($entity);
return $this->classMetadata->getIdentifierValues($entity);
}
/**
* Returns the ID value for an object.
*
* This method assumes that the object has a single-column ID.
*
* @param object $object The object.
*
* @return mixed The ID value.
*/
public function getIdValue($object)
{
if (!$object) {
return;
}
if (!$this->om->contains($object)) {
throw new RuntimeException('Entities passed to the choice field must be managed. Maybe ' . 'persist them in the entity manager?');
}
$this->om->initializeObject($object);
return current($this->classMetadata->getIdentifierValues($object));
}
/**
* @param object $entity
* @param Constraint $constraint
*
* @throws UnexpectedTypeException
* @throws ConstraintDefinitionException
*/
public function validate($entity, Constraint $constraint)
{
/** @var Unique $constraint */
if (!$constraint instanceof Unique) {
throw new UnexpectedTypeException($constraint, __NAMESPACE__ . '\\Unique');
}
if (!is_array($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.');
}
$class = $this->em->getClassMetadata($constraint->className);
/* @var $class \Doctrine\Common\Persistence\Mapping\ClassMetadata */
$criteria = [];
foreach ($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.
*/
$this->em->initializeObject($criteria[$fieldName]);
$relatedClass = $this->em->getClassMetadata($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 = $this->em->getRepository($constraint->className);
$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)) {
return;
}
if (1 === count($result)) {
$props = PropertyAccess::createPropertyAccessor();
if ($props->isReadable($entity, $constraint->idField)) {
$current = is_array($result) ? current($result) : $result;
if ($props->getValue($entity, $constraint->idField) === $props->getValue($current, $constraint->idField)) {
return;
}
}
}
$errorPath = null !== $constraint->errorPath ? $constraint->errorPath : $fields[0];
$invalidValue = isset($criteria[$errorPath]) ? $criteria[$errorPath] : $criteria[$fields[0]];
$this->buildViolation($constraint->message)->atPath($errorPath)->setInvalidValue($invalidValue)->addViolation();
}
