EagerLoadingExtension::joinRelations() - Code Metrics - Inspection of "getItemFromIri now takes an optional context as th..." - api-platform/core - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#822)

by Antoine

created 2016-11-02 16:05 UTC

EagerLoadingExtension::joinRelations() C

↳ Parent: EagerLoadingExtension

Complexity

Conditions	13
Paths	19

Size

Total Lines	56
Code Lines	33

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	56
c	0
b	0
f	0
rs	6.6843
cc	13
eloc	33
nc	19
nop	7

How to fix Long Method Complexity

<?php

/*
 * This file is part of the API Platform project.
 *
 * (c) Kévin Dunglas <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace ApiPlatform\Core\Bridge\Doctrine\Orm\Extension;

use ApiPlatform\Core\Bridge\Doctrine\Orm\Util\QueryNameGeneratorInterface;
use ApiPlatform\Core\Metadata\Property\Factory\PropertyMetadataFactoryInterface;
use ApiPlatform\Core\Metadata\Property\Factory\PropertyNameCollectionFactoryInterface;
use ApiPlatform\Core\Metadata\Resource\Factory\ResourceMetadataFactoryInterface;
use Doctrine\ORM\Mapping\ClassMetadataInfo;
use Doctrine\ORM\QueryBuilder;

/**
 * Eager loads relations.
 *
 * @author Charles Sarrazin <[email protected]>
 * @author Kévin Dunglas <[email protected]>
 * @author Antoine Bluchet <[email protected]>
 */
final class EagerLoadingExtension implements QueryCollectionExtensionInterface, QueryItemExtensionInterface
{
    private $propertyNameCollectionFactory;
    private $propertyMetadataFactory;
    private $resourceMetadataFactory;
    private $maxJoins;

    public function __construct(PropertyNameCollectionFactoryInterface $propertyNameCollectionFactory, PropertyMetadataFactoryInterface $propertyMetadataFactory, ResourceMetadataFactoryInterface $resourceMetadataFactory, int $maxJoins = 100)
    {
        $this->propertyMetadataFactory = $propertyMetadataFactory;
        $this->propertyNameCollectionFactory = $propertyNameCollectionFactory;
        $this->resourceMetadataFactory = $resourceMetadataFactory;
        $this->maxJoins = $maxJoins;
    }

    /**
     * Gets serializer groups once if available, if not it returns the $options array.
     *
     * @param array  $options       represents the operation name so that groups are the one of the specific operation
     * @param string $resourceClass
     * @param string $context       normalization_context or denormalization_context
     *
     * @return string[]
     */
    private function getSerializerGroups(string $resourceClass, array $options, string $context): array
    {
        $resourceMetadata = $this->resourceMetadataFactory->create($resourceClass);

        if (isset($options['collection_operation_name'])) {
            $context = $resourceMetadata->getCollectionOperationAttribute($options['collection_operation_name'], $context, null, true);
        } elseif (isset($options['item_operation_name'])) {
            $context = $resourceMetadata->getItemOperationAttribute($options['item_operation_name'], $context, null, true);
        } else {
            $context = $resourceMetadata->getAttribute($context);
        }

        if (empty($context['groups'])) {
            return $options;
        }

        return ['serializer_groups' => $context['groups']];
    }

    /**
     * {@inheritdoc}
     */
    public function applyToCollection(QueryBuilder $queryBuilder, QueryNameGeneratorInterface $queryNameGenerator, string $resourceClass, string $operationName = null)
    {
        $options = [];

        if (null !== $operationName) {
            $options = ['collection_operation_name' => $operationName];
        }

        $groups = $this->getSerializerGroups($resourceClass, $options, 'normalization_context');

        $this->joinRelations($queryBuilder, $resourceClass, $groups);
    }

    /**
     * {@inheritdoc}
     */
    public function applyToItem(QueryBuilder $queryBuilder, QueryNameGeneratorInterface $queryNameGenerator, string $resourceClass, array $identifiers, string $operationName = null, array $context = [])
    {
        $options = [];

        if (null !== $operationName) {
            $options = ['item_operation_name' => $operationName];
        }

        if (isset($context['groups'])) {
            $groups = ['serializer_groups' => $context['groups']];
        } elseif (isset($context['resource_class'])) {
            $groups = $this->getSerializerGroups($context['resource_class'], $options, isset($context['api_denormalize']) ? 'denormalization_context' : 'normalization_context');
        } else {
            $groups = $this->getSerializerGroups($resourceClass, $options, 'normalization_context');
        }

        $this->joinRelations($queryBuilder, $resourceClass, $groups);
    }

    /**
     * Left joins relations to eager load.
     *
     * @param QueryBuilder $queryBuilder
     * @param string       $resourceClass
     * @param array        $propertyMetadataOptions
     * @param string       $originAlias             the current entity alias (first o, then a1, a2 etc.)
     * @param string       $relationAlias           the previous relation alias to keep it unique
     * @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
     */
    private function joinRelations(QueryBuilder $queryBuilder, string $resourceClass, array $propertyMetadataOptions = [], string $originAlias = 'o', string &$relationAlias = 'a', bool $wasLeftJoin = false, $depth = 0)
    {
        if ($depth > $this->maxJoins) {
            throw new \RuntimeException('Too many joined relations, might be an infinite loop! Check out serialization groups!');
        }

        $entityManager = $queryBuilder->getEntityManager();
        $classMetadata = $entityManager->getClassMetadata($resourceClass);
        $j = 0;
        $i = 0;

        foreach ($classMetadata->associationMappings as $association => $mapping) {
            $propertyMetadata = $this->propertyMetadataFactory->create($resourceClass, $association, $propertyMetadataOptions);

            if (ClassMetadataInfo::FETCH_EAGER !== $mapping['fetch'] || false === $propertyMetadata->isReadableLink() || false === $propertyMetadata->isReadable()) {
                continue;
            }

            if (false === $wasLeftJoin) {
                $joinColumns = $mapping['joinColumns'] ?? $mapping['joinTable']['joinColumns'] ?? null;

                if (null === $joinColumns) {
                    $method = 'leftJoin';
                } else {
                    $method = false === $joinColumns[0]['nullable'] ? 'innerJoin' : 'leftJoin';
                }
            } else {
                $method = 'leftJoin';
            }

            $associationAlias = $relationAlias.$i++;
            $queryBuilder->{$method}($originAlias.'.'.$association, $associationAlias);
            $select = [];
            $targetClassMetadata = $entityManager->getClassMetadata($mapping['targetEntity']);

            foreach ($this->propertyNameCollectionFactory->create($mapping['targetEntity']) as $property) {
                $propertyMetadata = $this->propertyMetadataFactory->create($mapping['targetEntity'], $property, $propertyMetadataOptions);

                if (true === $propertyMetadata->isIdentifier()) {
                    $select[] = $property;
                    continue;
                }

                //the field test allows to add methods to a Resource which do not reflect real database fields
                if (true === $targetClassMetadata->hasField($property) && true === $propertyMetadata->isReadable()) {
                    $select[] = $property;
                }
            }

            $queryBuilder->addSelect(sprintf('partial %s.{%s}', $associationAlias, implode(',', $select)));

            $relationAlias = $relationAlias.++$j;

            $this->joinRelations($queryBuilder, $mapping['targetEntity'], $propertyMetadataOptions, $associationAlias, $relationAlias, $method === 'leftJoin', ++$depth);
        }
    }
}


1			<?php
2
3			/*
4			* This file is part of the API Platform project.
5			*
6			* (c) Kévin Dunglas <[email protected]>
7			*
8			* For the full copyright and license information, please view the LICENSE
9			* file that was distributed with this source code.
10			*/
11
12			namespace ApiPlatform\Core\Bridge\Doctrine\Orm\Extension;
13
14			use ApiPlatform\Core\Bridge\Doctrine\Orm\Util\QueryNameGeneratorInterface;
15			use ApiPlatform\Core\Metadata\Property\Factory\PropertyMetadataFactoryInterface;
16			use ApiPlatform\Core\Metadata\Property\Factory\PropertyNameCollectionFactoryInterface;
17			use ApiPlatform\Core\Metadata\Resource\Factory\ResourceMetadataFactoryInterface;
18			use Doctrine\ORM\Mapping\ClassMetadataInfo;
19			use Doctrine\ORM\QueryBuilder;
20
21			/**
22			* Eager loads relations.
23			*
24			* @author Charles Sarrazin <[email protected]>
25			* @author Kévin Dunglas <[email protected]>
26			* @author Antoine Bluchet <[email protected]>
27			*/
28			final class EagerLoadingExtension implements QueryCollectionExtensionInterface, QueryItemExtensionInterface
29			{
30			private $propertyNameCollectionFactory;
31			private $propertyMetadataFactory;
32			private $resourceMetadataFactory;
33			private $maxJoins;
34
35			public function __construct(PropertyNameCollectionFactoryInterface $propertyNameCollectionFactory, PropertyMetadataFactoryInterface $propertyMetadataFactory, ResourceMetadataFactoryInterface $resourceMetadataFactory, int $maxJoins = 100)
36			{
37			$this->propertyMetadataFactory = $propertyMetadataFactory;
38			$this->propertyNameCollectionFactory = $propertyNameCollectionFactory;
39			$this->resourceMetadataFactory = $resourceMetadataFactory;
40			$this->maxJoins = $maxJoins;
41			}
42
43			/**
44			* Gets serializer groups once if available, if not it returns the $options array.
45			*
46			* @param array $options represents the operation name so that groups are the one of the specific operation
47			* @param string $resourceClass
48			* @param string $context normalization_context or denormalization_context
49			*
50			* @return string[]
51			*/
52			private function getSerializerGroups(string $resourceClass, array $options, string $context): array
53			{
54			$resourceMetadata = $this->resourceMetadataFactory->create($resourceClass);
55
56			if (isset($options['collection_operation_name'])) {
57			$context = $resourceMetadata->getCollectionOperationAttribute($options['collection_operation_name'], $context, null, true);
58			} elseif (isset($options['item_operation_name'])) {
59			$context = $resourceMetadata->getItemOperationAttribute($options['item_operation_name'], $context, null, true);
60			} else {
61			$context = $resourceMetadata->getAttribute($context);
62			}
63
64			if (empty($context['groups'])) {
65			return $options;
66			}
67
68			return ['serializer_groups' => $context['groups']];
69			}
70
71			/**
72			* {@inheritdoc}
73			*/
74			public function applyToCollection(QueryBuilder $queryBuilder, QueryNameGeneratorInterface $queryNameGenerator, string $resourceClass, string $operationName = null)
75			{
76			$options = [];
77
78			if (null !== $operationName) {
79			$options = ['collection_operation_name' => $operationName];
80			}
81
82			$groups = $this->getSerializerGroups($resourceClass, $options, 'normalization_context');
83
84			$this->joinRelations($queryBuilder, $resourceClass, $groups);
85			}
86
87			/**
88			* {@inheritdoc}
89			*/
90			public function applyToItem(QueryBuilder $queryBuilder, QueryNameGeneratorInterface $queryNameGenerator, string $resourceClass, array $identifiers, string $operationName = null, array $context = [])
91			{
92			$options = [];
93
94			if (null !== $operationName) {
95			$options = ['item_operation_name' => $operationName];
96			}
97
98			if (isset($context['groups'])) {
99			$groups = ['serializer_groups' => $context['groups']];
100			} elseif (isset($context['resource_class'])) {
101			$groups = $this->getSerializerGroups($context['resource_class'], $options, isset($context['api_denormalize']) ? 'denormalization_context' : 'normalization_context');
102			} else {
103			$groups = $this->getSerializerGroups($resourceClass, $options, 'normalization_context');
104			}
105
106			$this->joinRelations($queryBuilder, $resourceClass, $groups);
107			}
108
109			/**
110			* Left joins relations to eager load.
111			*
112			* @param QueryBuilder $queryBuilder
113			* @param string $resourceClass
114			* @param array $propertyMetadataOptions
115			* @param string $originAlias the current entity alias (first o, then a1, a2 etc.)
116			* @param string $relationAlias the previous relation alias to keep it unique
117			* @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
118			*/
119			private function joinRelations(QueryBuilder $queryBuilder, string $resourceClass, array $propertyMetadataOptions = [], string $originAlias = 'o', string &$relationAlias = 'a', bool $wasLeftJoin = false, $depth = 0)
120			{
121			if ($depth > $this->maxJoins) {
122			throw new \RuntimeException('Too many joined relations, might be an infinite loop! Check out serialization groups!');
123			}
124
125			$entityManager = $queryBuilder->getEntityManager();
126			$classMetadata = $entityManager->getClassMetadata($resourceClass);
127			$j = 0;
128			$i = 0;
129
130			foreach ($classMetadata->associationMappings as $association => $mapping) {
131			$propertyMetadata = $this->propertyMetadataFactory->create($resourceClass, $association, $propertyMetadataOptions);
132
133			if (ClassMetadataInfo::FETCH_EAGER !== $mapping['fetch'] \|\| false === $propertyMetadata->isReadableLink() \|\| false === $propertyMetadata->isReadable()) {
134			continue;
135			}
136
137			if (false === $wasLeftJoin) {
138			$joinColumns = $mapping['joinColumns'] ?? $mapping['joinTable']['joinColumns'] ?? null;
139
140			if (null === $joinColumns) {
141			$method = 'leftJoin';
142			} else {
143			$method = false === $joinColumns[0]['nullable'] ? 'innerJoin' : 'leftJoin';
144			}
145			} else {
146			$method = 'leftJoin';
147			}
148
149			$associationAlias = $relationAlias.$i++;
150			$queryBuilder->{$method}($originAlias.'.'.$association, $associationAlias);
151			$select = [];
152			$targetClassMetadata = $entityManager->getClassMetadata($mapping['targetEntity']);
153
154			foreach ($this->propertyNameCollectionFactory->create($mapping['targetEntity']) as $property) {
155			$propertyMetadata = $this->propertyMetadataFactory->create($mapping['targetEntity'], $property, $propertyMetadataOptions);
156
157			if (true === $propertyMetadata->isIdentifier()) {
158			$select[] = $property;
159			continue;
160			}
161
162			//the field test allows to add methods to a Resource which do not reflect real database fields
163			if (true === $targetClassMetadata->hasField($property) && true === $propertyMetadata->isReadable()) {
164			$select[] = $property;
165			}
166			}
167
168			$queryBuilder->addSelect(sprintf('partial %s.{%s}', $associationAlias, implode(',', $select)));
169
170			$relationAlias = $relationAlias.++$j;
171
172			$this->joinRelations($queryBuilder, $mapping['targetEntity'], $propertyMetadataOptions, $associationAlias, $relationAlias, $method === 'leftJoin', ++$depth);
173			}
174			}
175			}
176

api-platform / core

Pull Request — master (#822)

EagerLoadingExtension::joinRelations() C

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity

Long Method

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