QueryBuilderHelper::mapJoinAliases() - Code Metrics - Inspection of "Don't use fetchJoinCollection on Doctrine Paginato..." - api-platform/core - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — 2.4 (#2639)

by Han Hui

created 2019-03-22 21:53 UTC

QueryBuilderHelper::mapJoinAliases() A

↳ Parent: QueryBuilderHelper

Complexity

Conditions	3
Paths	3

Size

Total Lines	16
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	3
eloc	9
nc	3
nop	1
dl	0
loc	16
rs	9.9666
c	0
b	0
f	0

<?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.
 */

declare(strict_types=1);

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

use Doctrine\Common\Persistence\ManagerRegistry;
use Doctrine\ORM\Query\Expr\Join;
use Doctrine\ORM\QueryBuilder;

/**
 * @author Vincent Chalamon <[email protected]>
 *
 * @internal
 */
final class QueryBuilderHelper
{
    private function __construct()
    {
    }

    /**
     * Adds a join to the QueryBuilder if none exists.
     */
    public static function addJoinOnce(QueryBuilder $queryBuilder, QueryNameGeneratorInterface $queryNameGenerator, string $alias, string $association, string $joinType = null, string $conditionType = null, string $condition = null, string $originAlias = null): string
    {
        $join = self::getExistingJoin($queryBuilder, $alias, $association, $originAlias);

        if (null !== $join) {
            return $join->getAlias();
        }

        $associationAlias = $queryNameGenerator->generateJoinAlias($association);
        $query = "$alias.$association";

        if (Join::LEFT_JOIN === $joinType || QueryChecker::hasLeftJoin($queryBuilder)) {
            $queryBuilder->leftJoin($query, $associationAlias, $conditionType, $condition);
        } else {
            $queryBuilder->innerJoin($query, $associationAlias, $conditionType, $condition);
        }

        return $associationAlias;
    }

    /**
     * Gets the entity class name by an alias used in the QueryBuilder.
     */
    public static function getEntityClassByAlias(string $alias, QueryBuilder $queryBuilder, ManagerRegistry $managerRegistry): string
    {
        if (!\in_array($alias, $queryBuilder->getAllAliases(), true)) {
            throw new \LogicException(sprintf('The alias "%s" does not exist in the QueryBuilder.', $alias));
        }

        $rootAliasMap = self::mapRootAliases($queryBuilder->getRootAliases(), $queryBuilder->getRootEntities());

        if (isset($rootAliasMap[$alias])) {
            return $rootAliasMap[$alias];
        }

        $metadata = null;

        foreach (self::traverseJoins($alias, $queryBuilder, $managerRegistry) as [$currentMetadata]) {
            $metadata = $currentMetadata;
        }

        if (null === $metadata) {
            throw new \LogicException(sprintf('The alias "%s" does not exist in the QueryBuilder.', $alias));
        }

        return $metadata->getName();
    }

    /**
     * Finds the root alias for an alias used in the QueryBuilder.
     */
    public static function findRootAlias(string $alias, QueryBuilder $queryBuilder): string
    {
        if (!\in_array($alias, $queryBuilder->getAllAliases(), true)) {
            throw new \LogicException(sprintf('The alias "%s" does not exist in the QueryBuilder.', $alias));
        }

        if (\in_array($alias, $queryBuilder->getRootAliases(), true)) {
            return $alias;
        }

        foreach ($queryBuilder->getDQLPart('join') as $rootAlias => $joins) {
            foreach ($joins as $join) {
                if ($alias === $join->getAlias()) {
                    return $rootAlias;
                }
            }
        }

        if (!\in_array($alias, $queryBuilder->getAllAliases(), true)) {
            throw new \LogicException(sprintf('The alias "%s" does not exist in the QueryBuilder.', $alias));
        }
interface ReturnsInt {
    public function returnsIntHinted(): int;
}

class MyClass implements ReturnsInt {
    public function returnsIntHinted(): int
    {
        if (foo()) {
            return 123;
        }
        // here: null is implicitly returned
    }
}
    }

    /**
     * Traverses through the joins for an alias used in the QueryBuilder.
     *
     * @return \Generator<string, array>
     */
    public static function traverseJoins(string $alias, QueryBuilder $queryBuilder, ManagerRegistry $managerRegistry): \Generator
    {
        $rootAliasMap = self::mapRootAliases($queryBuilder->getRootAliases(), $queryBuilder->getRootEntities());

        $joinParts = $queryBuilder->getDQLPart('join');
        $rootAlias = self::findRootAlias($alias, $queryBuilder);

        $joinAliasMap = self::mapJoinAliases($joinParts[$rootAlias]);

        $aliasMap = array_merge($rootAliasMap, $joinAliasMap);

        $apexEntityClass = null;
        $associationStack = [];
        $aliasStack = [];
        $currentAlias = $alias;

        while (null === $apexEntityClass) {
            if (!isset($aliasMap[$currentAlias])) {
                throw new \LogicException(sprintf('Unknown alias "%s".', $currentAlias));
            }

            if (\is_string($aliasMap[$currentAlias])) {
                $aliasStack[] = $currentAlias;
                $apexEntityClass = $aliasMap[$currentAlias];
            } else {
                [$parentAlias, $association] = $aliasMap[$currentAlias];

                $associationStack[] = $association;
                $aliasStack[] = $currentAlias;
                $currentAlias = $parentAlias;
            }
        }

        $entityClass = $apexEntityClass;

        while (null !== ($alias = array_pop($aliasStack))) {
            $metadata = $managerRegistry
                ->getManagerForClass($entityClass)
                ->getClassMetadata($entityClass);

            $association = array_pop($associationStack);

            yield $alias => [
                $metadata,
                $association,
            ];

            if (null !== $association) {
                $entityClass = $metadata->getAssociationTargetClass($association);
            }
        }
    }

    /**
     * Gets the existing join from QueryBuilder DQL parts.
     */
    private static function getExistingJoin(QueryBuilder $queryBuilder, string $alias, string $association, string $originAlias = null): ?Join
    {
        $parts = $queryBuilder->getDQLPart('join');
        $rootAlias = $originAlias ?? $queryBuilder->getRootAliases()[0];

        if (!isset($parts[$rootAlias])) {
            return null;
        }

        foreach ($parts[$rootAlias] as $join) {
            /** @var Join $join */
            if (sprintf('%s.%s', $alias, $association) === $join->getJoin()) {
                return $join;
            }
        }

        return null;
    }

    /**
     * Maps the root aliases to root entity classes.
     *
     * @return array<string, string>
     */
    private static function mapRootAliases(array $rootAliases, array $rootEntities): array
    {
        $aliasMap = array_combine($rootAliases, $rootEntities);
        if (false === $aliasMap) {
            throw new \LogicException('Number of root aliases and root entities do not match.');
        }

        return $aliasMap;
    }

    /**
     * Maps the join aliases to the parent alias and association, or the entity class.
     *
     * @return array<string, string[]|string>
     */
    private static function mapJoinAliases(iterable $joins): array
    {
        $aliasMap = [];

        foreach ($joins as $join) {
            $alias = $join->getAlias();
            $relationship = $join->getJoin();

            if (false !== strpos($relationship, '.')) {
                $aliasMap[$alias] = explode('.', $relationship);
            } else {
                $aliasMap[$alias] = $relationship;
            }
        }

        return $aliasMap;
    }
}


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			declare(strict_types=1);
13
14			namespace ApiPlatform\Core\Bridge\Doctrine\Orm\Util;
15
16			use Doctrine\Common\Persistence\ManagerRegistry;
17			use Doctrine\ORM\Query\Expr\Join;
18			use Doctrine\ORM\QueryBuilder;
19
20			/**
21			* @author Vincent Chalamon <[email protected]>
22			*
23			* @internal
24			*/
25			final class QueryBuilderHelper
26			{
27			private function __construct()
28			{
29			}
30
31			/**
32			* Adds a join to the QueryBuilder if none exists.
33			*/
34			public static function addJoinOnce(QueryBuilder $queryBuilder, QueryNameGeneratorInterface $queryNameGenerator, string $alias, string $association, string $joinType = null, string $conditionType = null, string $condition = null, string $originAlias = null): string
35			{
36			$join = self::getExistingJoin($queryBuilder, $alias, $association, $originAlias);
37
38			if (null !== $join) {
39			return $join->getAlias();
40			}
41
42			$associationAlias = $queryNameGenerator->generateJoinAlias($association);
43			$query = "$alias.$association";
44
45			if (Join::LEFT_JOIN === $joinType \|\| QueryChecker::hasLeftJoin($queryBuilder)) {
46			$queryBuilder->leftJoin($query, $associationAlias, $conditionType, $condition);
47			} else {
48			$queryBuilder->innerJoin($query, $associationAlias, $conditionType, $condition);
49			}
50
51			return $associationAlias;
52			}
53
54			/**
55			* Gets the entity class name by an alias used in the QueryBuilder.
56			*/
57			public static function getEntityClassByAlias(string $alias, QueryBuilder $queryBuilder, ManagerRegistry $managerRegistry): string
58			{
59			if (!\in_array($alias, $queryBuilder->getAllAliases(), true)) {
60			throw new \LogicException(sprintf('The alias "%s" does not exist in the QueryBuilder.', $alias));
61			}
62
63			$rootAliasMap = self::mapRootAliases($queryBuilder->getRootAliases(), $queryBuilder->getRootEntities());
64
65			if (isset($rootAliasMap[$alias])) {
66			return $rootAliasMap[$alias];
67			}
68
69			$metadata = null;
70
71			foreach (self::traverseJoins($alias, $queryBuilder, $managerRegistry) as [$currentMetadata]) {
72			$metadata = $currentMetadata;
73			}
74
75			if (null === $metadata) {
76			throw new \LogicException(sprintf('The alias "%s" does not exist in the QueryBuilder.', $alias));
77			}
78
79			return $metadata->getName();
80			}
81
82			/**
83			* Finds the root alias for an alias used in the QueryBuilder.
84			*/
85			public static function findRootAlias(string $alias, QueryBuilder $queryBuilder): string
86			{
87			if (!\in_array($alias, $queryBuilder->getAllAliases(), true)) {
88			throw new \LogicException(sprintf('The alias "%s" does not exist in the QueryBuilder.', $alias));
89			}
90
91			if (\in_array($alias, $queryBuilder->getRootAliases(), true)) {
92			return $alias;
93			}
94
95			foreach ($queryBuilder->getDQLPart('join') as $rootAlias => $joins) {
96			foreach ($joins as $join) {
97			if ($alias === $join->getAlias()) {
98			return $rootAlias;
99			}
100			}
101			}
102
103			if (!\in_array($alias, $queryBuilder->getAllAliases(), true)) {
104			throw new \LogicException(sprintf('The alias "%s" does not exist in the QueryBuilder.', $alias));
105			}
			0 ignored issues – show Bug Best Practice introduced 2019-03-22 21:54 UTC by Report Bug Copy Issue Report The function implicitly returns `null` when the `if` condition on line 103 is `false`. This is incompatible with the type-hinted return `string`. Consider adding a return statement or allowing `null` as return value. For hinted functions/methods where all return statements with the correct type are only reachable via conditions, ?null? gets implicitly returned which may be incompatible with the hinted type. Let?s take a look at an example: interface ReturnsInt { public function returnsIntHinted(): int; } class MyClass implements ReturnsInt { public function returnsIntHinted(): int { if (foo()) { return 123; } // here: null is implicitly returned } } Loading history...
106			}
107
108			/**
109			* Traverses through the joins for an alias used in the QueryBuilder.
110			*
111			* @return \Generator<string, array>
112			*/
113			public static function traverseJoins(string $alias, QueryBuilder $queryBuilder, ManagerRegistry $managerRegistry): \Generator
114			{
115			$rootAliasMap = self::mapRootAliases($queryBuilder->getRootAliases(), $queryBuilder->getRootEntities());
116
117			$joinParts = $queryBuilder->getDQLPart('join');
118			$rootAlias = self::findRootAlias($alias, $queryBuilder);
119
120			$joinAliasMap = self::mapJoinAliases($joinParts[$rootAlias]);
121
122			$aliasMap = array_merge($rootAliasMap, $joinAliasMap);
123
124			$apexEntityClass = null;
125			$associationStack = [];
126			$aliasStack = [];
127			$currentAlias = $alias;
128
129			while (null === $apexEntityClass) {
130			if (!isset($aliasMap[$currentAlias])) {
131			throw new \LogicException(sprintf('Unknown alias "%s".', $currentAlias));
132			}
133
134			if (\is_string($aliasMap[$currentAlias])) {
135			$aliasStack[] = $currentAlias;
136			$apexEntityClass = $aliasMap[$currentAlias];
137			} else {
138			[$parentAlias, $association] = $aliasMap[$currentAlias];
139
140			$associationStack[] = $association;
141			$aliasStack[] = $currentAlias;
142			$currentAlias = $parentAlias;
143			}
144			}
145
146			$entityClass = $apexEntityClass;
147
148			while (null !== ($alias = array_pop($aliasStack))) {
149			$metadata = $managerRegistry
150			->getManagerForClass($entityClass)
151			->getClassMetadata($entityClass);
152
153			$association = array_pop($associationStack);
154
155			yield $alias => [
156			$metadata,
157			$association,
158			];
159
160			if (null !== $association) {
161			$entityClass = $metadata->getAssociationTargetClass($association);
162			}
163			}
164			}
165
166			/**
167			* Gets the existing join from QueryBuilder DQL parts.
168			*/
169			private static function getExistingJoin(QueryBuilder $queryBuilder, string $alias, string $association, string $originAlias = null): ?Join
170			{
171			$parts = $queryBuilder->getDQLPart('join');
172			$rootAlias = $originAlias ?? $queryBuilder->getRootAliases()[0];
173
174			if (!isset($parts[$rootAlias])) {
175			return null;
176			}
177
178			foreach ($parts[$rootAlias] as $join) {
179			/** @var Join $join */
180			if (sprintf('%s.%s', $alias, $association) === $join->getJoin()) {
181			return $join;
182			}
183			}
184
185			return null;
186			}
187
188			/**
189			* Maps the root aliases to root entity classes.
190			*
191			* @return array<string, string>
192			*/
193			private static function mapRootAliases(array $rootAliases, array $rootEntities): array
194			{
195			$aliasMap = array_combine($rootAliases, $rootEntities);
196			if (false === $aliasMap) {
197			throw new \LogicException('Number of root aliases and root entities do not match.');
198			}
199
200			return $aliasMap;
201			}
202
203			/**
204			* Maps the join aliases to the parent alias and association, or the entity class.
205			*
206			* @return array<string, string[]\|string>
207			*/
208			private static function mapJoinAliases(iterable $joins): array
209			{
210			$aliasMap = [];
211
212			foreach ($joins as $join) {
213			$alias = $join->getAlias();
214			$relationship = $join->getJoin();
215
216			if (false !== strpos($relationship, '.')) {
217			$aliasMap[$alias] = explode('.', $relationship);
218			} else {
219			$aliasMap[$alias] = $relationship;
220			}
221			}
222
223			return $aliasMap;
224			}
225			}
226

api-platform / core

Pull Request — 2.4 (#2639)

QueryBuilderHelper::mapJoinAliases() A

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