diff --git a/application/symfony/src/Entity/Attribut/IdAttribut.php b/application/symfony/src/Entity/Attribut/IdAttribut.php
index 7a90708..a2db666 100644
--- a/application/symfony/src/Entity/Attribut/IdAttribut.php
+++ b/application/symfony/src/Entity/Attribut/IdAttribut.php
@@ -21,4 +21,9 @@ trait IdAttribut
     {
         return $this->id;
     }
+
+    public function hasId(): bool
+    {
+        return isset($this->id);
+    }
 }
diff --git a/application/symfony/src/Entity/Attribut/IdAttributInterface.php b/application/symfony/src/Entity/Attribut/IdAttributInterface.php
index 6af8838..63ee1de 100644
--- a/application/symfony/src/Entity/Attribut/IdAttributInterface.php
+++ b/application/symfony/src/Entity/Attribut/IdAttributInterface.php
@@ -7,7 +7,18 @@ namespace App\Entity\Attribut;
  */
 interface IdAttributInterface
 {
+    /**
+     * @param int $id
+     */
     public function setId(int $id): void;
 
+    /**
+     * @return int
+     */
     public function getId(): int;
+
+    /**
+     * @return bool Checks if attribute is set
+     */
+    public function hasId(): bool;
 }
diff --git a/application/symfony/src/Entity/Attribut/SlugAttribut.php b/application/symfony/src/Entity/Attribut/SlugAttribut.php
index c38d198..73dc5fb 100644
--- a/application/symfony/src/Entity/Attribut/SlugAttribut.php
+++ b/application/symfony/src/Entity/Attribut/SlugAttribut.php
@@ -2,6 +2,9 @@
 
 namespace App\Entity\Attribut;
 
+/**
+ * @author kevinfrantz
+ */
 trait SlugAttribut
 {
     /**
@@ -18,4 +21,9 @@ trait SlugAttribut
     {
         return $this->slug;
     }
+
+    public function hasSlug(): bool
+    {
+        return isset($this->slug);
+    }
 }
diff --git a/application/symfony/src/Entity/Attribut/SlugAttributInterface.php b/application/symfony/src/Entity/Attribut/SlugAttributInterface.php
index d106d87..6b09f31 100644
--- a/application/symfony/src/Entity/Attribut/SlugAttributInterface.php
+++ b/application/symfony/src/Entity/Attribut/SlugAttributInterface.php
@@ -2,9 +2,23 @@
 
 namespace App\Entity\Attribut;
 
+/**
+ * @author kevinfrantz
+ */
 interface SlugAttributInterface
 {
+    /**
+     * @param string $slug
+     */
     public function setSlug(string $slug): void;
 
+    /**
+     * @return string
+     */
     public function getSlug(): string;
+
+    /**
+     * @return bool Checks if a slug is set
+     */
+    public function hasSlug(): bool;
 }