fix filtering reset keys to numeric when string needed

src/PropertiesMapper.php

@@ -339,8 +339,7 @@ protected function mapIntoCollection(array $propertyTypes, string $propertyKey,
         $preferredCollectionTypeClass = $preferredCollectionType ? $preferredCollectionType->getClassName() : null;
 
         $collection = $collection->map(fn ($value) => is_string($value) ? trim($value) : $value)
-            ->filter(fn($item) => !blank($item))
-            ->values();
+            ->filter(fn($item) => !blank($item));
 
         if ($preferredCollectionType && $preferredCollectionType->getBuiltinType() === Type::BUILTIN_TYPE_OBJECT) {
             if (is_subclass_of($preferredCollectionTypeClass, Model::class)) {

tests/Unit/DataTransferObjectTest.php

@@ -9,6 +9,7 @@
 use Illuminate\Support\Collection;
 use Mockery;
 use PHPUnit\Framework\TestCase;
+use Workbench\App\DataTransferObjects\CreateComment;
 use Workbench\App\DataTransferObjects\CreateManyPostData;
 use Workbench\App\DataTransferObjects\CreatePostData;
 use Workbench\App\Enums\PostStatus;
@@ -270,4 +271,18 @@ public function testDataTransferObjectSentIntoAnotherAsCollectedWillBeMappedFrom
         $this->assertInstanceOf(Collection::class, $data->posts->last()->dates);
         $this->assertInstanceOf(Carbon::class, $data->posts->last()->dates->first());
     }
+
+    public function testDataTransferObjectRetainKeysFromNestedObjectsOrArrays()
+    {
+        $data = CreateComment::fromArray([
+            'content' => 'hello world',
+            'tags' => [
+                'hello' => 'world',
+                'foo' => 'bar'
+            ]
+        ]);
+
+        $this->assertArrayHasKey('hello', $data->tags);
+        $this->assertArrayHasKey('foo', $data->tags);
+    }
 }

workbench/app/DataTransferObjects/CreateComment.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Workbench\App\DataTransferObjects;
+
+use Illuminate\Support\Collection;
+use OpenSoutheners\LaravelDto\DataTransferObject;
+
+class CreateComment extends DataTransferObject
+{
+    public function __construct(
+        public string $content,
+        public array $tags
+    ) {
+        //
+    }
+}