fix(Attribute): fix on attribute type if persisted

Author: Guikingone

workflow/usage.rst

@@ -146,7 +146,7 @@ As configured, the following property is used by the marking store::
 
     class BlogPost
     {
-        // This property is used by the marking store
+        // This property is used by the marking store, by default, Symfony "mark" this attribute as an array.
         public $currentPlace;
         public $title;
         public $content;
@@ -164,6 +164,11 @@ As configured, the following property is used by the marking store::
     attributes of the ``marking_store`` option are optional. If omitted, their default values
     will be used.
 
+.. note::
+
+    Please note that if you decide to store $currentPlace using Doctrine,
+    the attribute must be mapped to an array.
+
 .. tip::
 
     Setting the ``audit_trail.enabled`` option to ``true`` makes the application