fix: #20002 optimize head request on serializeDataProvider

framework/CHANGELOG.md

@@ -6,9 +6,9 @@ Yii Framework 2 Change Log
 
 - Bug #13920: Fixed erroneous validation for specific cases (tim-fischer-maschinensucher)
 - Bug #19927: Fixed `console\controllers\MessageController` when saving translations to database: fixed FK error when adding new string and language at the same time, checking/regenerating all missing messages and dropping messages for unused languages (atrandafir)
+- Bug #20002: Fixed superfluous query on HEAD request in serializer (xicond)
 - Enh #12743: Added new methods `BaseActiveRecord::loadRelations()` and `BaseActiveRecord::loadRelationsFor()` to eager load related models for existing primary model instances (PowerGamer1)
 
-
 2.0.49.2 October 12, 2023
 -------------------------
 

framework/rest/Serializer.php

@@ -188,20 +188,20 @@
      */
     protected function serializeDataProvider($dataProvider)
     {
+        if (($pagination = $dataProvider->getPagination()) !== false) {
+            $this->addPaginationHeaders($pagination);
+        }
+        if ($this->request->getIsHead()) {
+            return null;
+        }
         if ($this->preserveKeys) {
             $models = $dataProvider->getModels();
         } else {
             $models = array_values($dataProvider->getModels());
         }
         $models = $this->serializeModels($models);
 
-        if (($pagination = $dataProvider->getPagination()) !== false) {
-            $this->addPaginationHeaders($pagination);
-        }
-
-        if ($this->request->getIsHead()) {
-            return null;
-        } elseif ($this->collectionEnvelope === null) {
+        if ($this->collectionEnvelope === null) {
             return $models;
         }
 

tests/framework/rest/SerializerTest.php

@@ -10,6 +10,7 @@
 use yii\base\Model;
 use yii\data\ArrayDataProvider;
 use yii\rest\Serializer;
+use yii\web\Request;
 use yiiunit\TestCase;
 
 /**
@@ -415,6 +416,32 @@ public function testSerializeDataProvider($dataProvider, $expectedResult, $saveK
         $this->assertEquals($expectedResult, $serializer->serialize($dataProvider));
     }
 
+    /**
+     * @dataProvider dataProviderSerializeDataProvider
+     *
+     * @param \yii\data\DataProviderInterface $dataProvider
+     * @param array $expectedResult
+     * @param bool $saveKeys
+     */
+    public function testHeadSerializeDataProvider($dataProvider, $expectedResult, $saveKeys = false)
+    {
+        $serializer = new Serializer();
+        $serializer->preserveKeys = $saveKeys;
+        $serializer->collectionEnvelope = 'data';
+
+        $this->assertEquals($expectedResult, $serializer->serialize($dataProvider)['data']);
+
+        $_SERVER['REQUEST_METHOD'] = 'HEAD';
+        $request = new Request();
+        $_POST[$request->methodParam] = 'HEAD';
+        $serializer = new Serializer([
+            'request' => $request
+        ]);
+        $serializer->preserveKeys = $saveKeys;
+        $this->assertEmpty($serializer->serialize($dataProvider));
+        unset($_POST[$request->methodParam], $_SERVER['REQUEST_METHOD']);
+    }
+
     /**
      * @see https://github.com/yiisoft/yii2/issues/16334
      */