add DB::transaction to catch looked query

app/Utilities/DatabaseFunctions.php

@@ -2,8 +2,6 @@
 
 namespace App\Utilities;
 
-use PDOException;
-
 class DatabaseFunctions
 {
     public static function save_update($query)
@@ -12,12 +10,13 @@ class DatabaseFunctions
         $tries = 0;
         do {
             $retry = false;
+            $tries++;
             try {
 
                 $query->save();
 
                 return $query;
-            } catch (PDOException $exc) {
+            } catch (\PDOException $exc) {
                 if ($tries < $max_tries && $exc->errorInfo[0] == 40001 && $exc->errorInfo[1] == 1213) {
                     $retry = true;
                     sleep(1);