fix bug

Author: ziaratban

src/Transaction.php

@@ -57,7 +57,7 @@ public function start($transactionOptions = []){
         if($this->clientSession->mongoSession->isInTransaction())
             throw new Exception('Nested transaction not supported');
         $this->clientSession->db->trigger(Connection::EVENT_START_TRANSACTION);
-        if($this->mongoSession->db->enableLogging)
+        if($this->clientSession->mongoSession->db->enableLogging)
             Yii::beginProfile('mongodb > start transaction(session id => '.$this->clientSession->getId().')');
         $this->clientSession->mongoSession->startTransaction($transactionOptions);
         Yii::debug('MongoDB transaction started.', __METHOD__);
@@ -70,7 +70,7 @@ public function start($transactionOptions = []){
     public function commit(){
         Yii::debug('Committing mongodb transaction ...', __METHOD__);
         $this->clientSession->mongoSession->commitTransaction();
-        if($this->mongoSession->db->enableLogging)
+        if($this->clientSession->mongoSession->db->enableLogging)
             Yii::endProfile('mongodb > start transaction(session id => '.$this->clientSession->getId().')');
         Yii::debug('Commit mongodb transaction.', __METHOD__);
         $this->clientSession->db->trigger(Connection::EVENT_COMMIT_TRANSACTION);
@@ -83,7 +83,7 @@ public function commit(){
     public function rollBack(){
         Yii::debug('Rolling back mongodb transaction ...', __METHOD__);
         $this->clientSession->mongoSession->abortTransaction();
-        if($this->mongoSession->db->enableLogging)
+        if($this->clientSession->mongoSession->db->enableLogging)
             Yii::endProfile('mongodb > start transaction(session id => '.$this->clientSession->getId().')');
         Yii::debug('Roll back mongodb transaction.', __METHOD__);
         $this->clientSession->db->trigger(Connection::EVENT_ROLLBACK_TRANSACTION);