/
FilterEagerLoadingExtension.php
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/
FilterEagerLoadingExtension.php
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<?php
/*
* This file is part of the API Platform project.
*
* (c) Kévin Dunglas <dunglas@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
declare(strict_types=1);
namespace ApiPlatform\Core\Bridge\Doctrine\Orm\Extension;
use ApiPlatform\Core\Api\ResourceClassResolverInterface;
use ApiPlatform\Core\Bridge\Doctrine\Orm\Util\EagerLoadingTrait;
use ApiPlatform\Core\Bridge\Doctrine\Orm\Util\QueryBuilderHelper;
use ApiPlatform\Core\Bridge\Doctrine\Orm\Util\QueryNameGeneratorInterface;
use ApiPlatform\Core\Exception\InvalidArgumentException;
use ApiPlatform\Core\Metadata\Resource\Factory\ResourceMetadataFactoryInterface;
use Doctrine\ORM\Query\Expr\Join;
use Doctrine\ORM\QueryBuilder;
/**
* Fixes filters on OneToMany associations
* https://github.com/api-platform/core/issues/944.
*/
final class FilterEagerLoadingExtension implements ContextAwareQueryCollectionExtensionInterface
{
use EagerLoadingTrait;
private $resourceClassResolver;
public function __construct(ResourceMetadataFactoryInterface $resourceMetadataFactory, bool $forceEager = true, ResourceClassResolverInterface $resourceClassResolver = null)
{
$this->resourceMetadataFactory = $resourceMetadataFactory;
$this->forceEager = $forceEager;
$this->resourceClassResolver = $resourceClassResolver;
}
/**
* {@inheritdoc}
*/
public function applyToCollection(QueryBuilder $queryBuilder, QueryNameGeneratorInterface $queryNameGenerator, string $resourceClass = null, string $operationName = null, array $context = [])
{
if (null === $resourceClass) {
throw new InvalidArgumentException('The "$resourceClass" parameter must not be null');
}
$em = $queryBuilder->getEntityManager();
$classMetadata = $em->getClassMetadata($resourceClass);
if (!$this->shouldOperationForceEager($resourceClass, ['collection_operation_name' => $operationName]) && !$this->hasFetchEagerAssociation($em, $classMetadata)) {
return;
}
//If no where part, nothing to do
$wherePart = $queryBuilder->getDQLPart('where');
if (!$wherePart) {
return;
}
$joinParts = $queryBuilder->getDQLPart('join');
$originAlias = $queryBuilder->getRootAliases()[0];
if (!$joinParts || !isset($joinParts[$originAlias])) {
return;
}
$queryBuilderClone = clone $queryBuilder;
$queryBuilderClone->resetDQLPart('where');
$changedWhereClause = false;
if (!$classMetadata->isIdentifierComposite) {
$replacementAlias = $queryNameGenerator->generateJoinAlias($originAlias);
$in = $this->getQueryBuilderWithNewAliases($queryBuilder, $queryNameGenerator, $originAlias, $replacementAlias);
if ($classMetadata->containsForeignIdentifier) {
$identifier = current($classMetadata->getIdentifier());
$in->select("IDENTITY($replacementAlias.$identifier)");
$queryBuilderClone->andWhere($queryBuilderClone->expr()->in("$originAlias.$identifier", $in->getDQL()));
} else {
$in->select($replacementAlias);
$queryBuilderClone->andWhere($queryBuilderClone->expr()->in($originAlias, $in->getDQL()));
}
$changedWhereClause = true;
} else {
// Because Doctrine doesn't support WHERE ( foo, bar ) IN () (https://github.com/doctrine/doctrine2/issues/5238), we are building as many subqueries as they are identifiers
foreach ($classMetadata->getIdentifier() as $identifier) {
if (!$classMetadata->hasAssociation($identifier)) {
continue;
}
$replacementAlias = $queryNameGenerator->generateJoinAlias($originAlias);
$in = $this->getQueryBuilderWithNewAliases($queryBuilder, $queryNameGenerator, $originAlias, $replacementAlias);
$in->select("IDENTITY($replacementAlias.$identifier)");
$queryBuilderClone->andWhere($queryBuilderClone->expr()->in("$originAlias.$identifier", $in->getDQL()));
$changedWhereClause = true;
}
}
if (false === $changedWhereClause) {
return;
}
$queryBuilder->resetDQLPart('where');
$queryBuilder->add('where', $queryBuilderClone->getDQLPart('where'));
}
/**
* Returns a clone of the given query builder where everything gets re-aliased.
*
* @param string $originAlias the base alias
* @param string $replacement the replacement for the base alias, will change the from alias
*/
private function getQueryBuilderWithNewAliases(QueryBuilder $queryBuilder, QueryNameGeneratorInterface $queryNameGenerator, string $originAlias = 'o', string $replacement = 'o_2'): QueryBuilder
{
$queryBuilderClone = clone $queryBuilder;
$joinParts = $queryBuilder->getDQLPart('join');
$wherePart = $queryBuilder->getDQLPart('where');
//reset parts
$queryBuilderClone->resetDQLPart('join');
$queryBuilderClone->resetDQLPart('where');
$queryBuilderClone->resetDQLPart('orderBy');
$queryBuilderClone->resetDQLPart('groupBy');
$queryBuilderClone->resetDQLPart('having');
//Change from alias
$from = $queryBuilderClone->getDQLPart('from')[0];
$queryBuilderClone->resetDQLPart('from');
$queryBuilderClone->from($from->getFrom(), $replacement);
$aliases = ["$originAlias."];
$replacements = ["$replacement."];
//Change join aliases
foreach ($joinParts[$originAlias] as $joinPart) {
/** @var Join $joinPart */
$joinString = str_replace($aliases, $replacements, $joinPart->getJoin());
$pos = strpos($joinString, '.');
if (false === $pos) {
if (null !== $joinPart->getCondition() && null !== $this->resourceClassResolver && $this->resourceClassResolver->isResourceClass($joinString)) {
$newAlias = $queryNameGenerator->generateJoinAlias($joinPart->getAlias());
$aliases[] = "{$joinPart->getAlias()}.";
$replacements[] = "$newAlias.";
$condition = str_replace($aliases, $replacements, $joinPart->getCondition());
$join = new Join($joinPart->getJoinType(), $joinPart->getJoin(), $newAlias, $joinPart->getConditionType(), $condition);
$queryBuilderClone->add('join', [$replacement => $join], true);
}
continue;
}
$alias = substr($joinString, 0, $pos);
$association = substr($joinString, $pos + 1);
$newAlias = $queryNameGenerator->generateJoinAlias($association);
$aliases[] = "{$joinPart->getAlias()}.";
$replacements[] = "$newAlias.";
$condition = str_replace($aliases, $replacements, $joinPart->getCondition() ?? '');
QueryBuilderHelper::addJoinOnce($queryBuilderClone, $queryNameGenerator, $alias, $association, $joinPart->getJoinType(), $joinPart->getConditionType(), $condition, $originAlias, $newAlias);
}
$queryBuilderClone->add('where', str_replace($aliases, $replacements, (string) $wherePart));
return $queryBuilderClone;
}
}