diff --git a/Admin/Installer.php b/Admin/Installer.php
index c80e909..b942e99 100755
--- a/Admin/Installer.php
+++ b/Admin/Installer.php
@@ -55,7 +55,7 @@ final class Installer extends InstallerAbstract
         WikiAppMapper::create()->execute($app);
 
         $category      = new WikiCategory();
-        $category->app = new NullWikiApp($app->getId());
+        $category->app = new NullWikiApp($app->id);
         $category->setL11n('Default');
 
         WikiCategoryMapper::create()->execute($category);
diff --git a/Controller/ApiController.php b/Controller/ApiController.php
index 0f40e73..8ce8303 100755
--- a/Controller/ApiController.php
+++ b/Controller/ApiController.php
@@ -124,21 +124,21 @@ final class ApiController extends Controller
             foreach ($uploaded as $media) {
                 $this->createModelRelation(
                     $request->header->account,
-                    $doc->getId(),
-                    $media->getId(),
+                    $doc->id,
+                    $media->id,
                     WikiDocMapper::class,
                     'media',
                     '',
                     $request->getOrigin()
                 );
 
-                $accountPath = '/Accounts/' . $account->getId() . ' ' . $account->login
-                    . '/Knowledgebase/' . ($doc->category?->getId() ?? '0')
-                    . '/' . $doc->getId();
+                $accountPath = '/Accounts/' . $account->id . ' ' . $account->login
+                    . '/Knowledgebase/' . ($doc->category?->id ?? '0')
+                    . '/' . $doc->id;
 
                 $ref            = new Reference();
                 $ref->name      = $media->name;
-                $ref->source    = new NullMedia($media->getId());
+                $ref->source    = new NullMedia($media->id);
                 $ref->createdBy = new NullAccount($request->header->account);
                 $ref->setVirtualPath($accountPath);
 
@@ -148,14 +148,14 @@ final class ApiController extends Controller
                     $collection = $this->app->moduleManager->get('Media')->createRecursiveMediaCollection(
                         $accountPath,
                         $request->header->account,
-                        __DIR__ . '/../../../Modules/Media/Files/Accounts/' . $account->getId() . '/Knowledgebase/' . ($doc->category?->getId() ?? '0') . '/' . $doc->getId()
+                        __DIR__ . '/../../../Modules/Media/Files/Accounts/' . $account->id . '/Knowledgebase/' . ($doc->category?->id ?? '0') . '/' . $doc->id
                     );
                 }
 
                 $this->createModelRelation(
                     $request->header->account,
-                    $collection->getId(),
-                    $ref->getId(),
+                    $collection->id,
+                    $ref->id,
                     CollectionMapper::class,
                     'sources',
                     '',
@@ -172,8 +172,8 @@ final class ApiController extends Controller
                 $media = MediaMapper::get()->where('id', (int) $file)->limit(1)->execute();
                 $this->createModelRelation(
                     $request->header->account,
-                    $doc->getId(),
-                    $media->getId(),
+                    $doc->id,
+                    $media->id,
                     WikiDocMapper::class,
                     'media',
                     '',
@@ -182,7 +182,7 @@ final class ApiController extends Controller
 
                 $ref            = new Reference();
                 $ref->name      = $media->name;
-                $ref->source    = new NullMedia($media->getId());
+                $ref->source    = new NullMedia($media->id);
                 $ref->createdBy = new NullAccount($request->header->account);
                 $ref->setVirtualPath($path);
 
@@ -198,8 +198,8 @@ final class ApiController extends Controller
 
                 $this->createModelRelation(
                     $request->header->account,
-                    $collection->getId(),
-                    $ref->getId(),
+                    $collection->id,
+                    $ref->id,
                     CollectionMapper::class,
                     'sources',
                     '',
@@ -221,8 +221,8 @@ final class ApiController extends Controller
     private function createWikiDir(WikiDoc $doc) : string
     {
         return '/Modules/Knowledgebase/'
-            . ($doc->category?->getId() ?? '0') . '/'
-            . $doc->getId();
+            . ($doc->category?->id ?? '0') . '/'
+            . $doc->id;
     }
 
     /**
diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index cc073c1..179b274 100755
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -319,7 +319,7 @@ final class BackendController extends Controller
         $accountId = $request->header->account;
 
         if (!$this->app->accountManager->get($accountId)->hasPermission(
-                PermissionType::READ, $this->app->unitId, $this->app->appId, self::NAME, PermissionCategory::WIKI, $document->getId())
+                PermissionType::READ, $this->app->unitId, $this->app->appId, self::NAME, PermissionCategory::WIKI, $document->id)
         ) {
             $view->setTemplate('/Web/Backend/Error/403_inline');
             $response->header->status = RequestStatusCode::R_403;
@@ -340,7 +340,7 @@ final class BackendController extends Controller
         $view->setData('categories', $categories);
         $view->setData('document', $document);
         $view->addData('editable', $this->app->accountManager->get($accountId)->hasPermission(
-            PermissionType::MODIFY, $this->app->unitId, $this->app->appId, self::NAME, PermissionCategory::WIKI, $document->getId())
+            PermissionType::MODIFY, $this->app->unitId, $this->app->appId, self::NAME, PermissionCategory::WIKI, $document->id)
         );
 
         return $view;
diff --git a/Models/WikiApp.php b/Models/WikiApp.php
index 4bb025c..6ce4c5f 100755
--- a/Models/WikiApp.php
+++ b/Models/WikiApp.php
@@ -30,7 +30,7 @@ class WikiApp implements \JsonSerializable
      * @var int
      * @since 1.0.0
      */
-    protected int $id = 0;
+    public int $id = 0;
 
     /**
      * Unit
diff --git a/Models/WikiCategory.php b/Models/WikiCategory.php
index e4f1540..dd7f912 100755
--- a/Models/WikiCategory.php
+++ b/Models/WikiCategory.php
@@ -33,7 +33,7 @@ class WikiCategory implements \JsonSerializable
      * @var int
      * @since 1.0.0
      */
-    protected int $id = 0;
+    public int $id = 0;
 
     /**
      * App id.
diff --git a/Models/WikiDoc.php b/Models/WikiDoc.php
index 132b172..34ae94f 100755
--- a/Models/WikiDoc.php
+++ b/Models/WikiDoc.php
@@ -36,7 +36,7 @@ class WikiDoc implements \JsonSerializable
      * @var int
      * @since 1.0.0
      */
-    protected int $id = 0;
+    public int $id = 0;
 
     /**
      * Version.
@@ -70,7 +70,7 @@ class WikiDoc implements \JsonSerializable
      * @var int
      * @since 1.0.0
      */
-    private int $status = WikiStatus::ACTIVE;
+    public int $status = WikiStatus::ACTIVE;
 
     /**
      * Document content.
@@ -102,7 +102,7 @@ class WikiDoc implements \JsonSerializable
      * @var string
      * @since 1.0.0
      */
-    private string $language = ISO639x1Enum::_EN;
+    public string $language = ISO639x1Enum::_EN;
 
     /**
      * Tags.
diff --git a/Models/WikiDocHistory.php b/Models/WikiDocHistory.php
index dbc138e..a901a41 100755
--- a/Models/WikiDocHistory.php
+++ b/Models/WikiDocHistory.php
@@ -34,7 +34,7 @@ class WikiDocHistory implements \JsonSerializable
      * @var int
      * @since 1.0.0
      */
-    protected int $id = 0;
+    public int $id = 0;
 
     /**
      * Article ID.
@@ -98,7 +98,7 @@ class WikiDocHistory implements \JsonSerializable
      * @var string
      * @since 1.0.0
      */
-    private string $language = ISO639x1Enum::_EN;
+    public string $language = ISO639x1Enum::_EN;
 
     /**
      * Constructor.
@@ -123,7 +123,7 @@ class WikiDocHistory implements \JsonSerializable
     public static function createFromDoc(WikiDoc $doc) : self
     {
         $hist            = new self();
-        $hist->article   = $doc->getId();
+        $hist->article   = $doc->id;
         $hist->createdBy = $doc->createdBy;
         $hist->name      = $doc->name;
         $hist->doc       = $doc->doc;
diff --git a/Theme/Backend/wiki-category-list.tpl.php b/Theme/Backend/wiki-category-list.tpl.php
index 41bf849..f4f7555 100755
--- a/Theme/Backend/wiki-category-list.tpl.php
+++ b/Theme/Backend/wiki-category-list.tpl.php
@@ -34,9 +34,9 @@ echo $this->getData('nav')->render();
                     <td><?= $this->getHtml('Parent'); ?>
                 <tbody>
                 <?php foreach ($categories as $key => $value) :
-                        $url = UriFactory::build('{/base}/admin/account/settings?{?}&id=' . $value->getId()); ?>
+                        $url = UriFactory::build('{/base}/admin/account/settings?{?}&id=' . $value->id); ?>
                 <tr tabindex="0" data-href="<?= $url; ?>">
-                    <td data-label="<?= $this->getHtml('ID', '0', '0'); ?>"><a href="<?= $url; ?>"><?= $value->getId(); ?></a>
+                    <td data-label="<?= $this->getHtml('ID', '0', '0'); ?>"><a href="<?= $url; ?>"><?= $value->id; ?></a>
                     <td data-label="<?= $this->getHtml('Name'); ?>"><a href="<?= $url; ?>"><?= $this->printHtml($value->getL11n()); ?></a>
                     <td data-label="<?= $this->getHtml('Parent'); ?>"><a href="<?= $url; ?>"><?= $this->printHtml($value->parent !== null ? $value->parent->getL11n() : ''); ?></a>
                 <?php endforeach; ?>
diff --git a/Theme/Backend/wiki-dashboard.tpl.php b/Theme/Backend/wiki-dashboard.tpl.php
index b288931..729c1da 100755
--- a/Theme/Backend/wiki-dashboard.tpl.php
+++ b/Theme/Backend/wiki-dashboard.tpl.php
@@ -29,7 +29,7 @@ echo $this->getData('nav')->render(); ?>
 <div class="row">
     <div class="col-xs-12 col-md-8 col-lg-9">
         <div class="row">
-            <?php foreach ($documents as $doc) : $url = UriFactory::build('{/base}/wiki/doc/single?id=' . $doc->getId()); ?>
+            <?php foreach ($documents as $doc) : $url = UriFactory::build('{/base}/wiki/doc/single?id=' . $doc->id); ?>
             <div class="col-xs-12 plain-grid">
                 <div class="portlet">
                     <div class="portlet-head"><a href="<?= $url; ?>"><?= $this->printHtml($doc->name); ?></a></div>
@@ -74,7 +74,7 @@ echo $this->getData('nav')->render(); ?>
             <div class="portlet-body">
                 <ul>
                     <?php foreach ($categories as $category) : ?>
-                        <li><a href="<?= UriFactory::build('{/base}/wiki/doc/list?{?}&id=' . $category->getId()); ?>"><?= $this->printHtml($category->getL11n()); ?></a>
+                        <li><a href="<?= UriFactory::build('{/base}/wiki/doc/list?{?}&id=' . $category->id); ?>"><?= $this->printHtml($category->getL11n()); ?></a>
                     <?php endforeach; ?>
                 </ul>
             </div>
diff --git a/Theme/Backend/wiki-doc-create.tpl.php b/Theme/Backend/wiki-doc-create.tpl.php
index 48cea3e..64d45b8 100755
--- a/Theme/Backend/wiki-doc-create.tpl.php
+++ b/Theme/Backend/wiki-doc-create.tpl.php
@@ -18,7 +18,7 @@ use phpOMS\Uri\UriFactory;
 
 /** @var \Modules\Knowledgebase\Models\WikiDoc $wiki */
 $wiki         = $this->getData('doc') ?? new NullWikiDoc();
-$isNewDoc     = $wiki instanceof NullWikiDoc;
+$isNewDoc     = $wiki->id === 0;
 $languages    = \phpOMS\Localization\ISO639Enum::getConstants();
 
 /** @var \phpOMS\Views\View $this */
diff --git a/Theme/Backend/wiki-doc-single.tpl.php b/Theme/Backend/wiki-doc-single.tpl.php
index 7746bc7..2da68aa 100755
--- a/Theme/Backend/wiki-doc-single.tpl.php
+++ b/Theme/Backend/wiki-doc-single.tpl.php
@@ -50,12 +50,12 @@ echo $this->getData('nav')->render();
                         <?php endforeach; ?>
 
                         <?php $files = $doc->getMedia(); foreach ($files as $file) : ?>
-                             <span><a class="content" href="<?= UriFactory::build('{/base}/media/single?id=' . $file->getId());?>"><?= $file->name; ?></a></span>
+                             <span><a class="content" href="<?= UriFactory::build('{/base}/media/single?id=' . $file->id);?>"><?= $file->name; ?></a></span>
                         <?php endforeach; ?>
                     </div>
                     <?php if ($editable) : ?>
                     <div class="col-xs-6 rightText">
-                        <a tabindex="0" class="button" href="<?= \phpOMS\Uri\UriFactory::build('wiki/doc/edit?id=' . $doc->getId()); ?>"><?= $this->getHtml('Edit', '0', '0'); ?></a>
+                        <a tabindex="0" class="button" href="<?= \phpOMS\Uri\UriFactory::build('wiki/doc/edit?id=' . $doc->id); ?>"><?= $this->getHtml('Edit', '0', '0'); ?></a>
                     </div>
                     <?php endif; ?>
                 </div>
@@ -70,7 +70,7 @@ echo $this->getData('nav')->render();
             <div class="portlet-body">
                 <ul>
                     <?php foreach ($categories as $category) : ?>
-                        <li><a href="<?= UriFactory::build('{/base}/wiki/doc/list?{?}&id=' . $category->getId()); ?>"><?= $this->printHtml($category->getL11n()); ?></a>
+                        <li><a href="<?= UriFactory::build('{/base}/wiki/doc/list?{?}&id=' . $category->id); ?>"><?= $this->printHtml($category->getL11n()); ?></a>
                     <?php endforeach; ?>
                 </ul>
             </div>
diff --git a/tests/Controller/ApiControllerTest.php b/tests/Controller/ApiControllerTest.php
index e2ec7c8..5613c46 100755
--- a/tests/Controller/ApiControllerTest.php
+++ b/tests/Controller/ApiControllerTest.php
@@ -107,7 +107,7 @@ final class ApiControllerTest extends \PHPUnit\Framework\TestCase
         $request->setData('name', 'Test App');
 
         $this->module->apiWikiAppCreate($request, $response);
-        self::assertGreaterThan(0, $aId = $response->get('')['response']->getId());
+        self::assertGreaterThan(0, $aId = $response->get('')['response']->id);
 
         //read
         $response = new HttpResponse();
@@ -162,7 +162,7 @@ final class ApiControllerTest extends \PHPUnit\Framework\TestCase
         $request->setData('name', 'Test Category');
 
         $this->module->apiWikiCategoryCreate($request, $response);
-        self::assertGreaterThan(0, $cId = $response->get('')['response']->getId());
+        self::assertGreaterThan(0, $cId = $response->get('')['response']->id);
 
         //read
         $response = new HttpResponse();
@@ -216,7 +216,7 @@ final class ApiControllerTest extends \PHPUnit\Framework\TestCase
         $request->setData('name', 'New Test Category');
 
         $this->module->apiWikiCategoryL11nCreate($request, $response);
-        self::assertGreaterThan(0, $response->get('')['response']->getId());
+        self::assertGreaterThan(0, $response->get('')['response']->id);
     }
 
     /**
@@ -267,7 +267,7 @@ final class ApiControllerTest extends \PHPUnit\Framework\TestCase
         $request->setData('media', \json_encode([1]));
 
         $this->module->apiWikiDocCreate($request, $response);
-        self::assertGreaterThan(0, $cId = $response->get('')['response']->getId());
+        self::assertGreaterThan(0, $cId = $response->get('')['response']->id);
 
         //read
         $response = new HttpResponse();
diff --git a/tests/Models/NullWikiAppTest.php b/tests/Models/NullWikiAppTest.php
index e06c23b..73d5220 100755
--- a/tests/Models/NullWikiAppTest.php
+++ b/tests/Models/NullWikiAppTest.php
@@ -37,6 +37,6 @@ final class NullWikiAppTest extends \PHPUnit\Framework\TestCase
     public function testId() : void
     {
         $null = new NullWikiApp(2);
-        self::assertEquals(2, $null->getId());
+        self::assertEquals(2, $null->id);
     }
 }
diff --git a/tests/Models/NullWikiCategoryTest.php b/tests/Models/NullWikiCategoryTest.php
index 938caee..dee5e82 100755
--- a/tests/Models/NullWikiCategoryTest.php
+++ b/tests/Models/NullWikiCategoryTest.php
@@ -37,6 +37,6 @@ final class NullWikiCategoryTest extends \PHPUnit\Framework\TestCase
     public function testId() : void
     {
         $null = new NullWikiCategory(2);
-        self::assertEquals(2, $null->getId());
+        self::assertEquals(2, $null->id);
     }
 }
diff --git a/tests/Models/NullWikiDocTest.php b/tests/Models/NullWikiDocTest.php
index 9082e2f..5349b4d 100755
--- a/tests/Models/NullWikiDocTest.php
+++ b/tests/Models/NullWikiDocTest.php
@@ -37,6 +37,6 @@ final class NullWikiDocTest extends \PHPUnit\Framework\TestCase
     public function testId() : void
     {
         $null = new NullWikiDoc(2);
-        self::assertEquals(2, $null->getId());
+        self::assertEquals(2, $null->id);
     }
 }
diff --git a/tests/Models/WikiAppMapperTest.php b/tests/Models/WikiAppMapperTest.php
index aec1996..963948a 100755
--- a/tests/Models/WikiAppMapperTest.php
+++ b/tests/Models/WikiAppMapperTest.php
@@ -36,10 +36,10 @@ final class WikiAppMapperTest extends \PHPUnit\Framework\TestCase
         $app->name = 'Test Category';
 
         $id = WikiAppMapper::create()->execute($app);
-        self::assertGreaterThan(0, $app->getId());
-        self::assertEquals($id, $app->getId());
+        self::assertGreaterThan(0, $app->id);
+        self::assertEquals($id, $app->id);
 
-        $appR = WikiAppMapper::get()->where('id', $app->getId())->execute();
+        $appR = WikiAppMapper::get()->where('id', $app->id)->execute();
         self::assertEquals($app->name, $appR->name);
     }
 }
diff --git a/tests/Models/WikiAppTest.php b/tests/Models/WikiAppTest.php
index 6944564..b221c0a 100755
--- a/tests/Models/WikiAppTest.php
+++ b/tests/Models/WikiAppTest.php
@@ -40,7 +40,7 @@ final class WikiAppTest extends \PHPUnit\Framework\TestCase
      */
     public function testDefault() : void
     {
-        self::assertEquals(0, $this->app->getId());
+        self::assertEquals(0, $this->app->id);
         self::assertEquals('', $this->app->name);
     }
 
diff --git a/tests/Models/WikiCategoryMapperTest.php b/tests/Models/WikiCategoryMapperTest.php
index af6c84f..7e86153 100755
--- a/tests/Models/WikiCategoryMapperTest.php
+++ b/tests/Models/WikiCategoryMapperTest.php
@@ -47,10 +47,10 @@ final class WikiCategoryMapperTest extends \PHPUnit\Framework\TestCase
         $this->category->setL11n('Test Category');
 
         $id = WikiCategoryMapper::create()->execute($this->category);
-        self::assertGreaterThan(0, $this->category->getId());
-        self::assertEquals($id, $this->category->getId());
+        self::assertGreaterThan(0, $this->category->id);
+        self::assertEquals($id, $this->category->id);
 
-        $categoryR = WikiCategoryMapper::get()->with('name')->where('id', $this->category->getId())->where('name/language', ISO639x1Enum::_EN)->execute();
+        $categoryR = WikiCategoryMapper::get()->with('name')->where('id', $this->category->id)->where('name/language', ISO639x1Enum::_EN)->execute();
         self::assertEquals($this->category->getL11n(), $categoryR->getL11n());
 
         self::assertGreaterThan(0, \count(WikiCategoryMapper::getAll()->where('app', 1)->execute()));
@@ -68,17 +68,17 @@ final class WikiCategoryMapperTest extends \PHPUnit\Framework\TestCase
         $this->category->parent = new NullWikiCategory(1);
 
         $id = WikiCategoryMapper::create()->execute($this->category);
-        self::assertGreaterThan(0, $this->category->getId());
-        self::assertEquals($id, $this->category->getId());
+        self::assertGreaterThan(0, $this->category->id);
+        self::assertEquals($id, $this->category->id);
 
         $categoryR = WikiCategoryMapper::get()
             ->with('name')
-            ->where('id', $this->category->getId())
+            ->where('id', $this->category->id)
             ->where('name/language', ISO639x1Enum::_EN)
             ->execute();
 
         self::assertEquals($this->category->getL11n(), $categoryR->getL11n());
-        self::assertEquals($this->category->parent->getId(), $categoryR->parent->getId());
+        self::assertEquals($this->category->parent->id, $categoryR->parent->id);
 
         self::assertGreaterThan(0,
             \count(
diff --git a/tests/Models/WikiCategoryTest.php b/tests/Models/WikiCategoryTest.php
index 185b506..6182a44 100755
--- a/tests/Models/WikiCategoryTest.php
+++ b/tests/Models/WikiCategoryTest.php
@@ -43,11 +43,11 @@ final class WikiCategoryTest extends \PHPUnit\Framework\TestCase
      */
     public function testDefault() : void
     {
-        self::assertEquals(0, $this->category->getId());
-        self::assertEquals(0, $this->category->app->getId());
+        self::assertEquals(0, $this->category->id);
+        self::assertEquals(0, $this->category->app->id);
         self::assertEquals('', $this->category->getL11n());
         self::assertEquals('/', $this->category->virtualPath);
-        self::assertEquals(0, $this->category->parent->getId());
+        self::assertEquals(0, $this->category->parent->id);
     }
 
     /**
@@ -58,7 +58,7 @@ final class WikiCategoryTest extends \PHPUnit\Framework\TestCase
     public function testAppInputOutput() : void
     {
         $this->category->app = new NullWikiApp(2);
-        self::assertEquals(2, $this->category->app->getId());
+        self::assertEquals(2, $this->category->app->id);
     }
 
     /**
@@ -94,7 +94,7 @@ final class WikiCategoryTest extends \PHPUnit\Framework\TestCase
     public function testParentInputOutput() : void
     {
         $this->category->parent = new NullWikiCategory(2);
-        self::assertEquals(2, $this->category->parent->getId());
+        self::assertEquals(2, $this->category->parent->id);
     }
 
     /**
diff --git a/tests/Models/WikiDocMapperTest.php b/tests/Models/WikiDocMapperTest.php
index 6fdcba6..27b735c 100755
--- a/tests/Models/WikiDocMapperTest.php
+++ b/tests/Models/WikiDocMapperTest.php
@@ -45,15 +45,15 @@ final class WikiDocMapperTest extends \PHPUnit\Framework\TestCase
         $doc->createdBy = new NullAccount(1);
 
         $id = WikiDocMapper::create()->execute($doc);
-        self::assertGreaterThan(0, $doc->getId());
-        self::assertEquals($id, $doc->getId());
+        self::assertGreaterThan(0, $doc->id);
+        self::assertEquals($id, $doc->id);
 
-        $docR = WikiDocMapper::get()->where('id', $doc->getId())->execute();
+        $docR = WikiDocMapper::get()->where('id', $doc->id)->execute();
         self::assertEquals($doc->name, $docR->name);
         self::assertEquals($doc->doc, $docR->doc);
         self::assertEquals($doc->getStatus(), $docR->getStatus());
         self::assertEquals($doc->getLanguage(), $docR->getLanguage());
-        self::assertEquals($doc->category->getId(), $docR->category->getId());
+        self::assertEquals($doc->category->id, $docR->category->id);
 
         self::assertGreaterThan(0,
             \count(
diff --git a/tests/Models/WikiDocTest.php b/tests/Models/WikiDocTest.php
index e0e7b76..ca60082 100755
--- a/tests/Models/WikiDocTest.php
+++ b/tests/Models/WikiDocTest.php
@@ -46,7 +46,7 @@ final class WikiDocTest extends \PHPUnit\Framework\TestCase
      */
     public function testDefault() : void
     {
-        self::assertEquals(0, $this->doc->getId());
+        self::assertEquals(0, $this->doc->id);
         self::assertNull($this->doc->app);
         self::assertEquals('', $this->doc->name);
         self::assertEquals('', $this->doc->doc);
@@ -65,7 +65,7 @@ final class WikiDocTest extends \PHPUnit\Framework\TestCase
     public function tesAppInputOutput() : void
     {
         $this->doc->app = new NullWikiApp(2);
-        self::assertEquals(2, $this->doc->app->getId());
+        self::assertEquals(2, $this->doc->app->id);
     }
 
     /**
@@ -120,7 +120,7 @@ final class WikiDocTest extends \PHPUnit\Framework\TestCase
     public function testCategoryInputOutput() : void
     {
         $this->doc->category = new NullWikiCategory(3);
-        self::assertEquals(3, $this->doc->category->getId());
+        self::assertEquals(3, $this->doc->category->id);
     }
 
     /**