@@ -647,10 +647,12 @@ jobs:
         php:
           - '8.0'
         symfony:
-          - '5.3'
+          - '5.4'
       fail-fast: false
     env:
-      SYMFONY_DEPRECATIONS_HELPER: max[direct]=0
+      # See https://github.com/doctrine/DoctrineMongoDBBundle/pull/673
+      #SYMFONY_DEPRECATIONS_HELPER: max[direct]=0
+      SYMFONY_DEPRECATIONS_HELPER: max[self]=0
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -709,7 +711,7 @@ jobs:
         php:
           - '8.0'
         symfony:
-          - '5.3'
+          - '5.4'
       fail-fast: false
     steps:
       - name: Checkout
 
@@ -33,16 +33,24 @@
 
 ## 2.6.5
 
-* JsonSchema: Update Hydra `@context` property possible types
+* Fix various usage of various deprecated methods
+* JsonSchema: Update Hydra `@context` property possible types (#4223)
+* JsonSchema: Add hydra:previous` to the `hydra:view` schema properties (#4310)
 * Filter validation: Fix issue in Required filter validator with dot notation (#4221)
 * OpenAPI: Fix notice/warning for `response` without `content` in the `openapi_context` (#4210)
 * OpenAPI: Do not use output for request body (#4213)
-* OpenAPI: Do not use jsonld schema for all media types (#4247) (BC note: `SchemaFactory::buildSchema()` is now immutable as it no longer modifies the passed `$schema`)
+* OpenAPI: Do not use JSON-lD schema for all media types (#4247) (BC note: `SchemaFactory::buildSchema()` is now immutable as it no longer modifies the passed `$schema`)
+* OpenAPI: Allow setting extensionProperties with YAML schema definition (#4228)
+* OpenAPI: do not throw error with non-standard HTTP verb (#4304)
 * Serializer: Convert internal error to HTTP 400 in Ramsey uuid denormalization from invalid body string (#4200)
-* Symfony: Add tests with Symfony Uuid (#4230)
-* OpenAPI: Allow to set extensionProperties with YAML schema definition (#4228)
 * GraphQL: Fix `FieldsBuilder` not fully unwrapping nested types before deciding if a resolver is needed (#4251)
 * GraphQL: Do not use a resolver for the nested payload of a mutation or subscription (#4289)
+* GraphQL: Allow search filter to use an int for its value (#4295)
+* Varnish: Improve `BAN` regex performance (#4231)
+* MongoDB: Fix denormalization of properties with embeds many that omit target document directive (#4315)
+* MongoDB: Fix resolving proxy class in class metadata factory (#4322)
+* Test: Add `withOptions()` to our HttpClient implementation (#4282)
+* Metadata: Fix allow using constants in XML configuration (resource attribute) (#4321)
 
 ## 2.6.4
 
 
@@ -8,7 +8,7 @@
     "authors": [
         {
             "name": "Kévin Dunglas",
-            "email": "dunglas@gmail.com",
+            "email": "kevin@dunglas.fr",
             "homepage": "https://dunglas.fr"
         }
     ],
@@ -30,6 +30,7 @@
         "behat/behat": "^3.1",
         "behat/mink": "^1.7",
         "doctrine/annotations": "^1.7",
+        "doctrine/cache": "^1.11",
         "doctrine/common": "^2.11 || ^3.0",
         "doctrine/data-fixtures": "^1.2.2",
         "doctrine/doctrine-bundle": "^1.12 || ^2.0",
 
@@ -0,0 +1,60 @@
+@mongodb
+Feature: Embed many without target document deserializable
+  In order to create and update resources
+  As a developer
+  I need to be able to deserialize data into objects with embed many that omit target document directive
+
+  @createSchema
+  Scenario: Post a resource with embedded data
+    When I add "Content-Type" header equal to "application/ld+json"
+    And I send a "POST" request to "/dummy_with_embed_many_omitting_target_documents" with body:
+    """
+    {
+      "embeddedDummies": [
+        {
+          "dummyName": "foo",
+          "dummyBoolean": true,
+          "dummyDate": "2020-01-01",
+          "dummyFloat": 0.1,
+          "dummyPrice": 10
+        },
+        {
+          "dummyName": "bar",
+          "dummyBoolean": false,
+          "dummyDate": "2021-01-01",
+          "dummyFloat": 0.2,
+          "dummyPrice": 20
+        }
+      ]
+    }
+    """
+    Then the response status code should be 201
+    And the response should be in JSON
+    And the header "Content-Type" should be equal to "application/ld+json; charset=utf-8"
+    And the JSON should be a superset of:
+    """
+    {
+      "@context": "/contexts/DummyWithEmbedManyOmittingTargetDocument",
+      "@id": "/dummy_with_embed_many_omitting_target_documents/1",
+      "@type": "DummyWithEmbedManyOmittingTargetDocument",
+      "id": 1,
+      "embeddedDummies": [
+        {
+          "@type": "EmbeddableDummy",
+          "dummyName": "foo",
+          "dummyBoolean": true,
+          "dummyDate": "2020-01-01T00:00:00+00:00",
+          "dummyFloat": 0.1,
+          "dummyPrice": 10
+        },
+        {
+          "@type": "EmbeddableDummy",
+          "dummyName": "bar",
+          "dummyBoolean": false,
+          "dummyDate": "2021-01-01T00:00:00+00:00",
+          "dummyFloat": 0.2,
+          "dummyPrice": 20
+        }
+      ]
+    }
+    """
@@ -146,6 +146,10 @@ Feature: Documentation support
                             "type": "string",
                             "format": "iri-reference"
                         },
+                        "hydra:previous": {
+                            "type": "string",
+                            "format": "iri-reference"
+                        },
                         "hydra:next": {
                             "type": "string",
                             "format": "iri-reference"
 
@@ -63,8 +63,13 @@ public function getTypes($class, $property, array $context = [])
         }
 
         if ($metadata->hasAssociation($property)) {
+            /** @var ?string $class */
             $class = $metadata->getAssociationTargetClass($property);
 
+            if (null === $class) {
+                return null;
+            }
+
             if ($metadata->isSingleValuedAssociation($property)) {
                 $nullable = $metadata instanceof MongoDbClassMetadata && $metadata->isNullable($property);
 
 
@@ -122,6 +122,10 @@
             <tag name="serializer.normalizer" priority="-895" />
         </service>
 
+        <service id="api_platform.serializer.mapping.class_metadata_factory" class="ApiPlatform\Core\Serializer\Mapping\Factory\ClassMetadataFactory" decorates="serializer.mapping.class_metadata_factory" decoration-priority="-1" public="false">
+            <argument type="service" id="api_platform.serializer.mapping.class_metadata_factory.inner" />
+        </service>
+
         <!-- Resources Operations path resolver -->
 
         <service id="api_platform.operation_path_resolver" alias="api_platform.operation_path_resolver.router" public="false" />