Fix purging HTTP cache for unreadable relations

Author: julienfalque

src/Bridge/Doctrine/EventListener/PurgeHttpCacheListener.php

@@ -125,7 +125,9 @@ private function gatherRelationTags(EntityManagerInterface $em, $entity): void
     {
         $associationMappings = $em->getClassMetadata(ClassUtils::getClass($entity))->getAssociationMappings();
         foreach (array_keys($associationMappings) as $property) {
-            $this->addTagsFor($this->propertyAccessor->getValue($entity, $property));
+            if ($this->propertyAccessor->isReadable($entity, $property)) {
+                $this->addTagsFor($this->propertyAccessor->getValue($entity, $property));
+            }
         }
     }
 

tests/Bridge/Doctrine/EventListener/PurgeHttpCacheListenerTest.php

@@ -29,6 +29,7 @@
 use Doctrine\ORM\UnitOfWork;
 use PHPUnit\Framework\TestCase;
 use Prophecy\Argument;
+use Symfony\Component\PropertyAccess\PropertyAccessorInterface;
 
 /**
  * @author Kévin Dunglas <[email protected]>
@@ -78,11 +79,22 @@ public function testOnFlush()
 
         $emProphecy = $this->prophesize(EntityManagerInterface::class);
         $emProphecy->getUnitOfWork()->willReturn($uowProphecy->reveal())->shouldBeCalled();
-        $emProphecy->getClassMetadata(Dummy::class)->willReturn(new ClassMetadata(Dummy::class))->shouldBeCalled();
+        $dummyClassMetadata = new ClassMetadata(Dummy::class);
+        $dummyClassMetadata->associationMappings = [
+            'relatedDummy' => [],
+            'relatedOwningDummy' => [],
+        ];
+        $emProphecy->getClassMetadata(Dummy::class)->willReturn($dummyClassMetadata)->shouldBeCalled();
         $emProphecy->getClassMetadata(DummyNoGetOperation::class)->willReturn(new ClassMetadata(DummyNoGetOperation::class))->shouldBeCalled();
         $eventArgs = new OnFlushEventArgs($emProphecy->reveal());
 
-        $listener = new PurgeHttpCacheListener($purgerProphecy->reveal(), $iriConverterProphecy->reveal(), $resourceClassResolverProphecy->reveal());
+        $propertyAccessorProphecy = $this->prophesize(PropertyAccessorInterface::class);
+        $propertyAccessorProphecy->isReadable(Argument::type(Dummy::class), 'relatedDummy')->willReturn(true);
+        $propertyAccessorProphecy->isReadable(Argument::type(Dummy::class), 'relatedOwningDummy')->willReturn(false);
+        $propertyAccessorProphecy->getValue(Argument::type(Dummy::class), 'relatedDummy')->shouldBeCalled();
+        $propertyAccessorProphecy->getValue(Argument::type(Dummy::class), 'relatedOwningDummy')->shouldNotBeCalled();
+
+        $listener = new PurgeHttpCacheListener($purgerProphecy->reveal(), $iriConverterProphecy->reveal(), $resourceClassResolverProphecy->reveal(), $propertyAccessorProphecy->reveal());
         $listener->onFlush($eventArgs);
         $listener->postFlush();
     }