fix(graphql): use depth for nested resource class operation (#5314)

* test: add reproducer for bug 5310

* fix(graphql): use depth for nested resource class operation

Co-authored-by: Alan Poulain <contact@alanpoulain.eu>

features/graphql/query.feature

@@ -68,6 +68,33 @@ Feature: GraphQL query support
     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 @!mongodb
+  Scenario: Retrieve an item with child relation to the same resource
+    Given there are tree dummies
+    When I send the following GraphQL request:
+    """
+    {
+      treeDummies {
+        edges {
+          node {
+            id
+            children {
+              totalCount
+            }
+          }
+        }
+      }
+    }
+    """
+    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 "errors" should not exist
+    And the JSON node "data.treeDummies.edges[0].node.id" should be equal to "/tree_dummies/1"
+    And the JSON node "data.treeDummies.edges[0].node.children.totalCount" should be equal to "1"
+    And the JSON node "data.treeDummies.edges[1].node.id" should be equal to "/tree_dummies/2"
+    And the JSON node "data.treeDummies.edges[1].node.children.totalCount" should be equal to "0"
+
   @createSchema
   Scenario: Retrieve a Relay Node
     Given there are 2 dummy objects with relatedDummy

src/GraphQl/Type/FieldsBuilder.php

@@ -262,7 +262,7 @@ private function getResourceFieldConfiguration(?string $property, ?string $field
             }
 
             $resourceOperation = $rootOperation;
-            if ($resourceClass && $rootOperation->getClass() && $this->resourceClassResolver->isResourceClass($resourceClass) && $rootOperation->getClass() !== $resourceClass) {
+            if ($resourceClass && $depth >= 1 && $this->resourceClassResolver->isResourceClass($resourceClass)) {
                 $resourceMetadataCollection = $this->resourceMetadataCollectionFactory->create($resourceClass);
                 $resourceOperation = $resourceMetadataCollection->getOperation($isCollectionType ? 'collection_query' : 'item_query');
             }

tests/Behat/DoctrineContext.php

@@ -167,6 +167,7 @@
 use ApiPlatform\Tests\Fixtures\TestBundle\Entity\SymfonyUuidDummy;
 use ApiPlatform\Tests\Fixtures\TestBundle\Entity\Taxon;
 use ApiPlatform\Tests\Fixtures\TestBundle\Entity\ThirdLevel;
+use ApiPlatform\Tests\Fixtures\TestBundle\Entity\TreeDummy;
 use ApiPlatform\Tests\Fixtures\TestBundle\Entity\UrlEncodedId;
 use ApiPlatform\Tests\Fixtures\TestBundle\Entity\User;
 use ApiPlatform\Tests\Fixtures\TestBundle\Entity\UuidIdentifierDummy;
@@ -799,6 +800,22 @@ public function thereAreMultiRelationsDummyObjectsHavingEachAManyToOneRelationMa
         $this->manager->flush();
     }
 
+    /**
+     * @Given there are tree dummies
+     */
+    public function thereAreTreeDummies(): void
+    {
+        $parentDummy = new TreeDummy();
+        $this->manager->persist($parentDummy);
+
+        $childDummy = new TreeDummy();
+        $childDummy->setParent($parentDummy);
+
+        $this->manager->persist($childDummy);
+
+        $this->manager->flush();
+    }
+
     /**
      * @Given there are :nb dummy objects with dummyDate
      * @Given there is :nb dummy object with dummyDate

tests/Fixtures/TestBundle/Entity/TreeDummy.php

@@ -0,0 +1,63 @@
+<?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\Tests\Fixtures\TestBundle\Entity;
+
+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\ORM\Mapping as ORM;
+
+#[ApiResource(graphQlOperations: [new Query(), new QueryCollection()])]
+#[ORM\Entity]
+class TreeDummy
+{
+    #[ORM\Column(type: 'integer', nullable: true)]
+    #[ORM\Id]
+    #[ORM\GeneratedValue(strategy: 'AUTO')]
+    private ?int $id = null;
+
+    #[ORM\ManyToOne(targetEntity: self::class, inversedBy: 'children')]
+    public ?TreeDummy $parent = null;
+
+    /** @var Collection<int, TreeDummy> */
+    #[ORM\OneToMany(targetEntity: self::class, mappedBy: 'parent')]
+    public Collection $children;
+
+    public function __construct()
+    {
+        $this->children = new ArrayCollection();
+    }
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function getParent(): ?self
+    {
+        return $this->parent;
+    }
+
+    public function setParent(?self $parent): void
+    {
+        $this->parent = $parent;
+    }
+
+    public function getChildren(): Collection
+    {
+        return $this->children;
+    }
+}