diff --git a/src/Attribute/Field.php b/src/Attribute/Field.php
index c16a67f..4434775 100644
--- a/src/Attribute/Field.php
+++ b/src/Attribute/Field.php
@@ -27,6 +27,7 @@ public function __construct(
         private readonly string|null $hydratorStrategy = null,
         private readonly array $excludeFilters = [],
         private readonly array $includeFilters = [],
+        private readonly string|null $extractorMethod = null,
     ) {
     }
 
@@ -54,4 +55,9 @@ public function getType(): string|null
     {
         return $this->type;
     }
+
+    public function getExtractorMethod(): string|null
+    {
+        return $this->extractorMethod;
+    }
 }
diff --git a/src/Filter/FilterFactory.php b/src/Filter/FilterFactory.php
index aec3ecf..dbcc46e 100644
--- a/src/Filter/FilterFactory.php
+++ b/src/Filter/FilterFactory.php
@@ -132,6 +132,11 @@ protected function addFields(Entity $targetEntity, array $allowedFilters): array
                 continue;
             }
 
+            // Fields with extractorMethod cannot be filtered at the database level
+            if (! empty($entityMetadata['fields'][$fieldName]['extractorMethod'])) {
+                continue;
+            }
+
             $type = $this->typeContainer
                 ->get($entityMetadata['fields'][$fieldName]['type']);
 
diff --git a/src/Hydrator/HydratorContainer.php b/src/Hydrator/HydratorContainer.php
index 953dff9..3015ed8 100644
--- a/src/Hydrator/HydratorContainer.php
+++ b/src/Hydrator/HydratorContainer.php
@@ -83,6 +83,26 @@ public function get(string $id): mixed
                 /** @psalm-suppress MixedArgument */
                 $object->setAllowedFields(array_map('strval', array_keys($metadata['fields'])));
 
+                // Register extractorMethod fields as computed overrides
+                /** @psalm-suppress MixedArrayAccess, MixedAssignment */
+                foreach ($metadata['fields'] as $fieldName => $fieldMetadata) {
+                    /** @psalm-suppress MixedArrayAccess */
+                    $extractorMethod = $fieldMetadata['extractorMethod'] ?? null;
+                    if ($extractorMethod === null) {
+                        continue;
+                    }
+
+                    // Use alias as data key when present so FieldResolver can find it by GraphQL field name
+                    /** @psalm-suppress MixedArrayAccess */
+                    $dataKey = $fieldMetadata['alias'] ?? $fieldName;
+
+                    /** @psalm-suppress MixedArgument, MixedMethodCall */
+                    $object->addComputedField(
+                        $dataKey,
+                        static fn (object $entity): mixed => $entity->$extractorMethod(),
+                    );
+                }
+
                 // Register computed fields
                 if (isset($metadata['computedFields'])) {
                     /** @psalm-suppress MixedArrayAccess, MixedAssignment */
diff --git a/src/Hydrator/Strategy/Collection.php b/src/Hydrator/Strategy/Collection.php
index e3d76d8..93803f6 100644
--- a/src/Hydrator/Strategy/Collection.php
+++ b/src/Hydrator/Strategy/Collection.php
@@ -157,7 +157,8 @@ protected function getCollectionFromObjectByValue(): DoctrineCollection
      */
     protected function getCollectionFromObjectByReference(): DoctrineCollection
     {
-        $object       = $this->getObject();
+        $object = $this->getObject();
+        /** @psalm-suppress UndefinedDocblockClass */
         $refl         = $this->getClassMetadata()->getReflectionClass();
         $reflProperty = $refl->getProperty($this->getCollectionName());
 
diff --git a/src/Metadata/MetadataFactory.php b/src/Metadata/MetadataFactory.php
index 09542ce..c049db3 100644
--- a/src/Metadata/MetadataFactory.php
+++ b/src/Metadata/MetadataFactory.php
@@ -172,6 +172,7 @@ private function buildMetadataForFields(
                     'hydratorStrategy' => $instance->getHydratorStrategy() ??
                         $this->getDefaultStrategy($entityClassMetadata->getTypeOfField($fieldName)),
                     'excludeFilters' => Filters::toStringArray($instance->getExcludeFilters()),
+                    'extractorMethod' => $instance->getExtractorMethod(),
                 ];
 
                 /** @psalm-suppress MixedArrayAssignment */
diff --git a/test/Entity/Artist.php b/test/Entity/Artist.php
index 8017d40..70a5098 100644
--- a/test/Entity/Artist.php
+++ b/test/Entity/Artist.php
@@ -28,6 +28,7 @@
 #[GraphQL\Entity(group: 'ExtractionMap', limit: 1)]
 #[GraphQL\Entity(group: 'ExtractionMapDuplicate', limit: 1)]
 #[GraphQL\Entity(group: 'computedFieldTest')]
+#[GraphQL\Entity(group: 'extractorMethodTest')]
 
 #[ORM\Entity]
 class Artist
@@ -45,6 +46,7 @@ class Artist
     #[GraphQL\Field(group: 'ExtractionMap', alias: 'title')]
     #[GraphQL\Field(group: 'ExtractionMapDuplicate', alias: 'duplicate')]
     #[GraphQL\Field(group: 'computedFieldTest')]
+    #[GraphQL\Field(group: 'extractorMethodTest', extractorMethod: 'getNameUppercased')]
 
     #[ORM\Column(type: 'string', nullable: false)]
     private string $name;
@@ -57,6 +59,7 @@ class Artist
     #[GraphQL\Field(group: 'AttributeLimit')]
     #[GraphQL\Field(group: 'ExtractionMapDuplicate', alias: 'duplicate')]
     #[GraphQL\Field(group: 'computedFieldTest')]
+    #[GraphQL\Field(group: 'extractorMethodTest')]
 
     #[ORM\Id]
     #[ORM\Column(type: 'bigint')]
@@ -156,6 +159,14 @@ public function getPerformances(): Collection
         return $this->performances;
     }
 
+    /**
+     * Returns name uppercased — used as extractorMethod target in extractorMethodTest group
+     */
+    public function getNameUppercased(): string
+    {
+        return strtoupper($this->name);
+    }
+
     /**
      * Get full name in uppercase (for testing computed fields)
      */
diff --git a/test/Feature/ExtractorMethod/ExtractorMethodTest.php b/test/Feature/ExtractorMethod/ExtractorMethodTest.php
new file mode 100644
index 0000000..3728800
--- /dev/null
+++ b/test/Feature/ExtractorMethod/ExtractorMethodTest.php
@@ -0,0 +1,70 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ApiSkeletonsTest\Doctrine\ORM\GraphQL\Feature\ExtractorMethod;
+
+use ApiSkeletons\Doctrine\ORM\GraphQL\Config;
+use ApiSkeletons\Doctrine\ORM\GraphQL\Driver;
+use ApiSkeletons\Doctrine\ORM\GraphQL\Type\Entity\EntityTypeContainer;
+use ApiSkeletonsTest\Doctrine\ORM\GraphQL\Entity\Artist;
+use ApiSkeletonsTest\Doctrine\ORM\GraphQL\TestCase;
+use GraphQL\GraphQL;
+use GraphQL\Type\Definition\ObjectType;
+use GraphQL\Type\Schema;
+
+use function strtoupper;
+
+class ExtractorMethodTest extends TestCase
+{
+    public function testExtractorMethodInMetadata(): void
+    {
+        $driver = new Driver($this->getEntityManager(), new Config(['group' => 'extractorMethodTest']));
+
+        $driver->type(Artist::class);
+
+        $metadata = $driver->get(EntityTypeContainer::class)
+            ->get(Artist::class)
+            ->getMetadata();
+
+        $this->assertEquals('getNameUppercased', $metadata['fields']['name']['extractorMethod']);
+    }
+
+    public function testExtractorMethodResolvesToMethodReturn(): void
+    {
+        $driver = new Driver($this->getEntityManager(), new Config(['group' => 'extractorMethodTest']));
+
+        $schema = new Schema([
+            'query' => new ObjectType([
+                'name' => 'query',
+                'fields' => [
+                    'artists' => $driver->completeConnection(Artist::class),
+                ],
+            ]),
+        ]);
+
+        $result = GraphQL::executeQuery($schema, '{ artists { edges { node { id name } } } }')->toArray();
+
+        $this->assertEmpty($result['errors'] ?? []);
+        $this->assertNotEmpty($result['data']['artists']['edges']);
+
+        foreach ($result['data']['artists']['edges'] as $edge) {
+            // name should be the uppercased value from getNameUppercased(), not the raw stored value
+            $this->assertEquals(strtoupper($edge['node']['name']), $edge['node']['name']);
+        }
+    }
+
+    public function testExtractorMethodFieldNotInFilters(): void
+    {
+        $driver = new Driver($this->getEntityManager(), new Config(['group' => 'extractorMethodTest']));
+
+        $filterType = $driver->filter(Artist::class);
+        $fields     = $filterType->getFields();
+
+        // name has extractorMethod so must not appear in filters
+        $this->assertArrayNotHasKey('name', $fields);
+
+        // id has no extractorMethod so must still be filterable
+        $this->assertArrayHasKey('id', $fields);
+    }
+}
diff --git a/test/Feature/Metadata/CachingTest.php b/test/Feature/Metadata/CachingTest.php
index 9535dc3..5383bdc 100644
--- a/test/Feature/Metadata/CachingTest.php
+++ b/test/Feature/Metadata/CachingTest.php
@@ -38,7 +38,7 @@ public function testStaticMetadata(): void
                 'entityClass' => 'ApiSkeletonsTest\Doctrine\ORM\GraphQL\Entity\User',
                 'byValue' => true,
                 'limit' => 0,
-                'description' => '',
+                'description' => null,
                 'excludeFilters' => [],
                 'typeName' => 'ApiSkeletonsTest_Doctrine_ORM_GraphQL_Entity_User_StaticMetadata',
                 'fields' => [
@@ -48,6 +48,7 @@ public function testStaticMetadata(): void
                         'type' => 'string',
                         'hydratorStrategy' => 'ApiSkeletons\Doctrine\ORM\GraphQL\Hydrator\Strategy\FieldDefault',
                         'excludeFilters' => [],
+                        'extractorMethod' => null,
                     ],
                     'recordings' => [
                         'alias' => null,