fix(graphql): link relations requires the property

features/graphql/query.feature

@@ -20,6 +20,54 @@ Feature: GraphQL query support
     And the JSON node "data.dummy.name" should be equal to "Dummy #1"
     And the JSON node "data.dummy.name_converted" should be equal to "Converted 1"
 
+  @createSchema
+  Scenario: Retrieve an item with different relations to the same resource
+    Given there are 2 multiRelationsDummy objects having each a manyToOneRelation, 2 manyToManyRelations and 3 oneToManyRelations
+    When I send the following GraphQL request:
+    """
+    {
+      multiRelationsDummy(id: "/multi_relations_dummies/2") {
+        id
+        name
+        manyToOneRelation {
+          id
+          name
+        }
+        manyToManyRelations {
+          edges{
+            node {
+             id
+              name
+            }
+          }
+        }
+        oneToManyRelations {
+          edges{
+            node {
+              id
+              name
+            }
+          }
+        }
+      }
+    }
+    """
+    Then the response status code should be 200
+    And the response should be in JSON
+    And the header "Content-Type" should be equal to "application/json"
+    And the JSON node "data.multiRelationsDummy.id" should be equal to "/multi_relations_dummies/2"
+    And the JSON node "data.multiRelationsDummy.name" should be equal to "Dummy #2"
+    And the JSON node "data.multiRelationsDummy.manyToOneRelation.id" should not be null
+    And the JSON node "data.multiRelationsDummy.manyToOneRelation.name" should be equal to "RelatedManyToOneDummy #2"
+    And the JSON node "data.multiRelationsDummy.manyToManyRelations.edges" should have 2 element
+    And the JSON node "data.multiRelationsDummy.manyToManyRelations.edges[1].node.id" should not be null
+    And the JSON node "data.multiRelationsDummy.manyToManyRelations.edges[0].node.name" should be equal to "RelatedManyToManyDummy12"
+    And the JSON node "data.multiRelationsDummy.manyToManyRelations.edges[1].node.name" should be equal to "RelatedManyToManyDummy22"
+    And the JSON node "data.multiRelationsDummy.oneToManyRelations.edges" should have 3 element
+    And the JSON node "data.multiRelationsDummy.oneToManyRelations.edges[1].node.id" should not be null
+    And the JSON node "data.multiRelationsDummy.oneToManyRelations.edges[0].node.name" should be equal to "RelatedOneToManyDummy12"
+    And the JSON node "data.multiRelationsDummy.oneToManyRelations.edges[2].node.name" should be equal to "RelatedOneToManyDummy32"
+
   @createSchema
   Scenario: Retrieve a Relay Node
     Given there are 2 dummy objects with relatedDummy

src/Doctrine/Common/State/LinksHandlerTrait.php

@@ -34,14 +34,20 @@ private function getLinks(string $resourceClass, Operation $operation, array $co
             return $links;
         }
 
-        $newLinks = [];
+        $newLink = null;
+        $linkProperty = $context['linkProperty'] ?? null;
 
         foreach ($links as $link) {
-            if ($linkClass === $link->getFromClass()) {
-                $newLinks[] = $link;
+            if ($linkClass === $link->getFromClass() && $linkProperty === $link->getFromProperty()) {
+                $newLink = $link;
+                break;
             }
         }
 
+        if ($newLink) {
+            return [$newLink];
+        }
+
         // Using GraphQL, it's possible that we won't find a GraphQL Operation of the same type (e.g. it is disabled).
         try {
             $resourceMetadataCollection = $this->resourceMetadataCollectionFactory->create($linkClass);
@@ -62,16 +68,17 @@ private function getLinks(string $resourceClass, Operation $operation, array $co
         }
 
         foreach ($this->getOperationLinks($linkedOperation ?? null) as $link) {
-            if ($resourceClass === $link->getToClass()) {
-                $newLinks[] = $link;
+            if ($resourceClass === $link->getToClass() && $linkProperty === $link->getFromProperty()) {
+                $newLink = $link;
+                break;
             }
         }
 
-        if (!$newLinks) {
+        if (!$newLink) {
             throw new RuntimeException(sprintf('The class "%s" cannot be retrieved from "%s".', $resourceClass, $linkClass));
         }
 
-        return $newLinks;
+        return [$newLink];
     }
 
     private function getIdentifierValue(array &$identifiers, string $name = null): mixed

src/GraphQl/Resolver/Stage/ReadStage.php

@@ -83,6 +83,7 @@ public function __invoke(?string $resourceClass, ?string $rootClass, Operation $
         if (isset($source[$info->fieldName], $source[ItemNormalizer::ITEM_IDENTIFIERS_KEY], $source[ItemNormalizer::ITEM_RESOURCE_CLASS_KEY])) {
             $uriVariables = $source[ItemNormalizer::ITEM_IDENTIFIERS_KEY];
             $normalizationContext['linkClass'] = $source[ItemNormalizer::ITEM_RESOURCE_CLASS_KEY];
+            $normalizationContext['linkProperty'] = $info->fieldName;
         }
 
         return $this->provider->provide($operation, $uriVariables, $normalizationContext);

src/Metadata/Resource/Factory/LinkResourceMetadataCollectionFactory.php

@@ -68,16 +68,16 @@ private function mergeLinks(array $links, array $toMergeLinks): array
     {
         $classLinks = [];
         foreach ($links as $link) {
-            $classLinks[$link->getToClass()] = $link;
+            $classLinks[$link->getToClass().'#'.$link->getFromProperty()] = $link;
         }
 
         foreach ($toMergeLinks as $link) {
-            if (isset($classLinks[$link->getToClass()])) {
-                $classLinks[$link->getToClass()] = $classLinks[$link->getToClass()]->withLink($link);
+            if (null !== $prevLink = $classLinks[$link->getToClass().'#'.$link->getFromProperty()] ?? null) {
+                $classLinks[$link->getToClass().'#'.$link->getFromProperty()] = $prevLink->withLink($link);
 
                 continue;
             }
-            $classLinks[$link->getToClass()] = $link;
+            $classLinks[$link->getToClass().'#'.$link->getFromProperty()] = $link;
         }
 
         return array_values($classLinks);

tests/Behat/DoctrineContext.php

@@ -63,6 +63,8 @@
 use ApiPlatform\Tests\Fixtures\TestBundle\Document\InitializeInput as InitializeInputDocument;
 use ApiPlatform\Tests\Fixtures\TestBundle\Document\IriOnlyDummy as IriOnlyDummyDocument;
 use ApiPlatform\Tests\Fixtures\TestBundle\Document\MaxDepthDummy as MaxDepthDummyDocument;
+use ApiPlatform\Tests\Fixtures\TestBundle\Document\MultiRelationsDummy as MultiRelationsDummyDocument;
+use ApiPlatform\Tests\Fixtures\TestBundle\Document\MultiRelationsRelatedDummy as MultiRelationsRelatedDummyDocument;
 use ApiPlatform\Tests\Fixtures\TestBundle\Document\NetworkPathDummy as NetworkPathDummyDocument;
 use ApiPlatform\Tests\Fixtures\TestBundle\Document\NetworkPathRelationDummy as NetworkPathRelationDummyDocument;
 use ApiPlatform\Tests\Fixtures\TestBundle\Document\Order as OrderDocument;
@@ -138,6 +140,8 @@
 use ApiPlatform\Tests\Fixtures\TestBundle\Entity\InternalUser;
 use ApiPlatform\Tests\Fixtures\TestBundle\Entity\IriOnlyDummy;
 use ApiPlatform\Tests\Fixtures\TestBundle\Entity\MaxDepthDummy;
+use ApiPlatform\Tests\Fixtures\TestBundle\Entity\MultiRelationsDummy;
+use ApiPlatform\Tests\Fixtures\TestBundle\Entity\MultiRelationsRelatedDummy;
 use ApiPlatform\Tests\Fixtures\TestBundle\Entity\NetworkPathDummy;
 use ApiPlatform\Tests\Fixtures\TestBundle\Entity\NetworkPathRelationDummy;
 use ApiPlatform\Tests\Fixtures\TestBundle\Entity\Order;
@@ -759,6 +763,42 @@ public function thereAreDummyObjectsWithRelatedDummies(int $nb, int $nbrelated):
         $this->manager->flush();
     }
 
+    /**
+     * @Given there are :nb multiRelationsDummy objects having each a manyToOneRelation, :nbmtmr manyToManyRelations and :nbotmr oneToManyRelations
+     */
+    public function thereAreMultiRelationsDummyObjectsHavingEachAManyToOneRelationManyToManyRelationsAndOneToManyRelations(int $nb, int $nbmtmr, int $nbotmr): void
+    {
+        for ($i = 1; $i <= $nb; ++$i) {
+            $relatedDummy = $this->buildMultiRelationsRelatedDummy();
+            $relatedDummy->name = 'RelatedManyToOneDummy #'.$i;
+
+            $dummy = $this->buildMultiRelationsDummy();
+            $dummy->name = 'Dummy #'.$i;
+            $dummy->setManyToOneRelation($relatedDummy);
+
+            for ($j = 1; $j <= $nbmtmr; ++$j) {
+                $manyToManyItem = $this->buildMultiRelationsRelatedDummy();
+                $manyToManyItem->name = 'RelatedManyToManyDummy'.$j.$i;
+                $this->manager->persist($manyToManyItem);
+
+                $dummy->addManyToManyRelation($manyToManyItem);
+            }
+
+            for ($j = 1; $j <= $nbotmr; ++$j) {
+                $oneToManyItem = $this->buildMultiRelationsRelatedDummy();
+                $oneToManyItem->name = 'RelatedOneToManyDummy'.$j.$i;
+                $oneToManyItem->setOneToManyRelation($dummy);
+                $this->manager->persist($oneToManyItem);
+
+                $dummy->addOneToManyRelation($oneToManyItem);
+            }
+
+            $this->manager->persist($relatedDummy);
+            $this->manager->persist($dummy);
+        }
+        $this->manager->flush();
+    }
+
     /**
      * @Given there are :nb dummy objects with dummyDate
      * @Given there is :nb dummy object with dummyDate
@@ -2300,4 +2340,14 @@ private function buildPayment(string $amount): Payment|PaymentDocument
     {
         return $this->isOrm() ? new Payment($amount) : new PaymentDocument($amount);
     }
+
+    private function buildMultiRelationsDummy(): MultiRelationsDummy|MultiRelationsDummyDocument
+    {
+        return $this->isOrm() ? new MultiRelationsDummy() : new MultiRelationsDummyDocument();
+    }
+
+    private function buildMultiRelationsRelatedDummy(): MultiRelationsRelatedDummy|MultiRelationsRelatedDummyDocument
+    {
+        return $this->isOrm() ? new MultiRelationsRelatedDummy() : new MultiRelationsRelatedDummyDocument();
+    }
 }

tests/Fixtures/TestBundle/Document/MultiRelationsDummy.php

@@ -0,0 +1,79 @@
+<?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\Tests\Fixtures\TestBundle\Document;
+
+use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Metadata\GraphQl\Query;
+use ApiPlatform\Metadata\GraphQl\QueryCollection;
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\Common\Collections\Collection;
+use Doctrine\ODM\MongoDB\Mapping\Annotations as ODM;
+
+/**
+ * Dummy using different kind of relations to the same resource.
+ *
+ * @author Thomas Helmrich <[email protected]>
+ */
+#[ApiResource(graphQlOperations: [new QueryCollection(), new Query()])]
+#[ODM\Document]
+class MultiRelationsDummy
+{
+    #[ODM\Id(strategy: 'INCREMENT', type: 'int')]
+    private ?int $id = null;
+
+    #[ODM\Field(type: 'string')]
+    public string $name;
+
+    #[ODM\ReferenceOne(targetDocument: MultiRelationsRelatedDummy::class, storeAs: 'id', nullable: true)]
+    public ?MultiRelationsRelatedDummy $manyToOneRelation = null;
+
+    /** @var Collection<int, MultiRelationsRelatedDummy> */
+    #[ODM\ReferenceMany(targetDocument: MultiRelationsRelatedDummy::class, storeAs: 'id', nullable: true)]
+    public Collection $manyToManyRelations;
+
+    /** @var Collection<int, MultiRelationsRelatedDummy> */
+    #[ODM\ReferenceMany(targetDocument: MultiRelationsRelatedDummy::class, mappedBy: 'oneToManyRelation', storeAs: 'id')]
+    public Collection $oneToManyRelations;
+
+    public function __construct()
+    {
+        $this->manyToManyRelations = new ArrayCollection();
+        $this->oneToManyRelations = new ArrayCollection();
+    }
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function getManyToOneRelation(): ?MultiRelationsRelatedDummy
+    {
+        return $this->manyToOneRelation;
+    }
+
+    public function setManyToOneRelation(?MultiRelationsRelatedDummy $relatedMultiUsedDummy): void
+    {
+        $this->manyToOneRelation = $relatedMultiUsedDummy;
+    }
+
+    public function addManyToManyRelation(MultiRelationsRelatedDummy $relatedMultiUsedDummy): void
+    {
+        $this->manyToManyRelations->add($relatedMultiUsedDummy);
+    }
+
+    public function addOneToManyRelation(MultiRelationsRelatedDummy $relatedMultiUsedDummy): void
+    {
+        $this->oneToManyRelations->add($relatedMultiUsedDummy);
+    }
+}

tests/Fixtures/TestBundle/Document/MultiRelationsRelatedDummy.php

@@ -0,0 +1,53 @@
+<?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\Tests\Fixtures\TestBundle\Document;
+
+use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Metadata\GraphQl\Query;
+use ApiPlatform\Metadata\GraphQl\QueryCollection;
+use Doctrine\ODM\MongoDB\Mapping\Annotations as ODM;
+
+/**
+ * Dummy used in different kind of relations in the same resource.
+ *
+ * @author Thomas Helmrich <[email protected]>
+ */
+#[ApiResource(graphQlOperations: [new QueryCollection(), new Query()])]
+#[ODM\Document]
+class MultiRelationsRelatedDummy
+{
+    #[ODM\Id(strategy: 'INCREMENT', type: 'int')]
+    private ?int $id = null;
+
+    #[ODM\Field(type: 'string', nullable: true)]
+    public ?string $name;
+
+    #[ODM\ReferenceOne(targetDocument: MultiRelationsDummy::class, inversedBy: 'oneToManyRelations', nullable: true, storeAs: 'id')]
+    private ?MultiRelationsDummy $oneToManyRelation;
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function getOneToManyRelation(): ?MultiRelationsDummy
+    {
+        return $this->oneToManyRelation;
+    }
+
+    public function setOneToManyRelation(?MultiRelationsDummy $oneToManyRelation): void
+    {
+        $this->oneToManyRelation = $oneToManyRelation;
+    }
+}