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<?php |
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/* |
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* This file is part of the API Platform project. |
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* |
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* (c) Kévin Dunglas <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace ApiPlatform\Core\Bridge\Doctrine\Orm\Extension; |
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use ApiPlatform\Core\Bridge\Doctrine\Orm\Util\QueryNameGeneratorInterface; |
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use ApiPlatform\Core\Exception\RuntimeException; |
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use ApiPlatform\Core\Metadata\Property\Factory\PropertyMetadataFactoryInterface; |
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use ApiPlatform\Core\Metadata\Property\Factory\PropertyNameCollectionFactoryInterface; |
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use ApiPlatform\Core\Metadata\Resource\Factory\ResourceMetadataFactoryInterface; |
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use Doctrine\ORM\Mapping\ClassMetadataInfo; |
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use Doctrine\ORM\QueryBuilder; |
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/** |
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* Eager loads relations. |
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* |
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* @author Charles Sarrazin <[email protected]> |
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* @author Kévin Dunglas <[email protected]> |
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* @author Antoine Bluchet <[email protected]> |
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*/ |
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final class EagerLoadingExtension implements QueryCollectionExtensionInterface, QueryItemExtensionInterface |
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{ |
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private $propertyNameCollectionFactory; |
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private $propertyMetadataFactory; |
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private $resourceMetadataFactory; |
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private $enabled; |
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private $maxJoins; |
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private $eagerOnly; |
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public function __construct(PropertyNameCollectionFactoryInterface $propertyNameCollectionFactory, PropertyMetadataFactoryInterface $propertyMetadataFactory, ResourceMetadataFactoryInterface $resourceMetadataFactory, bool $enabled = true, int $maxJoins = 30, bool $eagerOnly = true) |
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{ |
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$this->propertyMetadataFactory = $propertyMetadataFactory; |
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$this->propertyNameCollectionFactory = $propertyNameCollectionFactory; |
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$this->resourceMetadataFactory = $resourceMetadataFactory; |
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$this->enabled = $enabled; |
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$this->maxJoins = $maxJoins; |
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$this->eagerOnly = $eagerOnly; |
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} |
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/** |
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* Gets serializer groups once if available, if not it returns the $options array. |
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* |
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* @param array $options represents the operation name so that groups are the one of the specific operation |
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* @param string $resourceClass |
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* @param string $context normalization_context or denormalization_context |
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* |
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* @return string[] |
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*/ |
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private function getSerializerGroups(string $resourceClass, array $options, string $context): array |
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{ |
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$resourceMetadata = $this->resourceMetadataFactory->create($resourceClass); |
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if (isset($options['collection_operation_name'])) { |
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$context = $resourceMetadata->getCollectionOperationAttribute($options['collection_operation_name'], $context, null, true); |
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} elseif (isset($options['item_operation_name'])) { |
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$context = $resourceMetadata->getItemOperationAttribute($options['item_operation_name'], $context, null, true); |
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} else { |
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$context = $resourceMetadata->getAttribute($context); |
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} |
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if (empty($context['groups'])) { |
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return $options; |
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} |
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return ['serializer_groups' => $context['groups']]; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function applyToCollection(QueryBuilder $queryBuilder, QueryNameGeneratorInterface $queryNameGenerator, string $resourceClass, string $operationName = null) |
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{ |
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if (false === $this->enabled) { |
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return; |
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} |
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$options = []; |
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if (null !== $operationName) { |
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$options = ['collection_operation_name' => $operationName]; |
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} |
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$groups = $this->getSerializerGroups($resourceClass, $options, 'normalization_context'); |
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$this->joinRelations($queryBuilder, $resourceClass, $groups); |
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} |
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/** |
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* {@inheritdoc} |
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* The context may contain serialization groups which helps defining joined entities that are readable. |
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*/ |
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public function applyToItem(QueryBuilder $queryBuilder, QueryNameGeneratorInterface $queryNameGenerator, string $resourceClass, array $identifiers, string $operationName = null, array $context = []) |
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{ |
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if (false === $this->enabled) { |
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return; |
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} |
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$options = []; |
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if (null !== $operationName) { |
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$options = ['item_operation_name' => $operationName]; |
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} |
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if (isset($context['groups'])) { |
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$groups = ['serializer_groups' => $context['groups']]; |
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} elseif (isset($context['resource_class'])) { |
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$groups = $this->getSerializerGroups($context['resource_class'], $options, isset($context['api_denormalize']) ? 'denormalization_context' : 'normalization_context'); |
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} else { |
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$groups = $this->getSerializerGroups($resourceClass, $options, 'normalization_context'); |
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} |
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$this->joinRelations($queryBuilder, $resourceClass, $groups); |
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} |
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/** |
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* Left joins relations to eager load. |
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* |
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* @param QueryBuilder $queryBuilder |
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* @param string $resourceClass |
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* @param array $propertyMetadataOptions |
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* @param string $originAlias the current entity alias (first o, then a1, a2 etc.) |
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* @param string $relationAlias the previous relation alias to keep it unique |
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* @param bool $wasLeftJoin if the relation containing the new one had a left join, we have to force the new one to left join too |
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* @param int $joinCount the number of joins |
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* |
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* @throws RuntimeException when the max number of joins has been reached |
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*/ |
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private function joinRelations(QueryBuilder $queryBuilder, string $resourceClass, array $propertyMetadataOptions = [], string $originAlias = 'o', string &$relationAlias = 'a', bool $wasLeftJoin = false, int &$joinCount = 0) |
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{ |
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if ($joinCount > $this->maxJoins) { |
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throw new RuntimeException('The total number of joined relations has exceeded the specified maximum. Raise the limit if necessary.'); |
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} |
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$entityManager = $queryBuilder->getEntityManager(); |
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$classMetadata = $entityManager->getClassMetadata($resourceClass); |
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$j = 0; |
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$i = 0; |
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foreach ($classMetadata->associationMappings as $association => $mapping) { |
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$propertyMetadata = $this->propertyMetadataFactory->create($resourceClass, $association, $propertyMetadataOptions); |
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if (true === $this->eagerOnly && ClassMetadataInfo::FETCH_EAGER !== $mapping['fetch']) { |
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continue; |
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} |
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if (false === $propertyMetadata->isReadableLink() || false === $propertyMetadata->isReadable()) { |
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continue; |
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} |
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if (false === $wasLeftJoin) { |
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$joinColumns = $mapping['joinColumns'] ?? $mapping['joinTable']['joinColumns'] ?? null; |
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if (null === $joinColumns) { |
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$method = 'leftJoin'; |
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} else { |
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$method = false === $joinColumns[0]['nullable'] ? 'innerJoin' : 'leftJoin'; |
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} |
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} else { |
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$method = 'leftJoin'; |
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} |
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$associationAlias = $relationAlias.$i++; |
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$queryBuilder->{$method}($originAlias.'.'.$association, $associationAlias); |
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++$joinCount; |
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$select = []; |
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$targetClassMetadata = $entityManager->getClassMetadata($mapping['targetEntity']); |
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foreach ($this->propertyNameCollectionFactory->create($mapping['targetEntity']) as $property) { |
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$propertyMetadata = $this->propertyMetadataFactory->create($mapping['targetEntity'], $property, $propertyMetadataOptions); |
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if (true === $propertyMetadata->isIdentifier()) { |
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$select[] = $property; |
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continue; |
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} |
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//the field test allows to add methods to a Resource which do not reflect real database fields |
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if (true === $targetClassMetadata->hasField($property) && true === $propertyMetadata->isReadable()) { |
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$select[] = $property; |
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} |
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} |
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$queryBuilder->addSelect(sprintf('partial %s.{%s}', $associationAlias, implode(',', $select))); |
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$relationAlias .= ++$j; |
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$this->joinRelations($queryBuilder, $mapping['targetEntity'], $propertyMetadataOptions, $associationAlias, $relationAlias, $method === 'leftJoin', $joinCount); |
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} |
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} |
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} |
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api-platform /
core
