added array model to dbo conversion method

src/Utils/LuDataAccess.php

@@ -26,6 +26,21 @@ abstract class LuDataAccess {
         return $this->model;
     }
 
+    /**
+     * @param $data LuModel[]
+     * @return LuDbo[]
+     */
+    protected function arrayToDbo($data)
+    {
+        $tab = [];
+        foreach ($data as $q) {
+            if (!is_null($q)) {
+                $tab[] = $q->toDbo();
+            }
+        }
+        return $tab;
+    }
+
     /**
      * @param $page int
      * @param $perPage int
@@ -43,11 +58,7 @@ abstract class LuDataAccess {
 
         $data = $data->orderBy($column, $order)->take($perPage)->offset($page * $perPage)->get();
 
-        $tab = [];
-        /* @var $data LuModel[] */
-        foreach ($data as $q) {
-            $tab[] = $q->toDbo();
-        }
+        $tab = $this->arrayToDbo($data);
         return $tab;
     }