diff --git a/src/ActiveRecord.php b/src/ActiveRecord.php
index 34979cdbb..7dc819dde 100644
--- a/src/ActiveRecord.php
+++ b/src/ActiveRecord.php
@@ -916,7 +916,7 @@ public static function flushBatchDelete($scope = ''){
      * @return ActiveRecord|null the locked document.
      * Returns instance of ActiveRecord. Null will be returned if the query does not have a result.
     */
-    public static function lockDocument($idOrWhere, $lockFieldNames, $modifyOptions = [], $db = null)
+    public static function lockDocument($idOrWhere, $lockFieldNames = '_lock', $modifyOptions = [], $db = null)
     {
         $db = $db ? $db : static::getDb();
         $db->transactionReady('lock document');
@@ -963,7 +963,7 @@ public static function lockDocument($idOrWhere, $lockFieldNames, $modifyOptions
      * Returns instance of ActiveRecord. Null will be returned if the query does not have a result.
      * When the total number of attempts to lock the document passes `try`, conflict error will be thrown
     */
-    public static function LockDocumentStubbornly($id, $lockFieldName, $options = [], $db = null)
+    public static function LockDocumentStubbornly($id, $lockFieldName = '_lock', $options = [], $db = null)
     {
         $db = $db ? $db : static::getDb();
 
diff --git a/src/Transaction.php b/src/Transaction.php
index 242fb01c6..adfdeb2f1 100644
--- a/src/Transaction.php
+++ b/src/Transaction.php
@@ -193,13 +193,19 @@ public function safeRollBack(&$exception = null)
         }
     }
 
-    public function run($query, $throw = false, $log = false){
+    public function run($query, $throw = false, $log = false, $commit = false){
         $lastMongoSession = $this->clientSession->db->getSession();
         try {
             if(!$this->clientSession->getInTransaction())
                 $this->start();
             $this->clientSession->db->setSession($this->clientSession);
-            return $query();
+            if($query()) {
+                if($commit) {
+                    return $this->safeCommit();
+                }
+                return true;
+            }
+            return false;
         }
         catch(\Throwable $e) {
             $this->lastRunError = $e;