From c16e5e4240369bf611b5fea82aa6f69809504d4f Mon Sep 17 00:00:00 2001
From: Qiang Xue <qiang.xue@gmail.com>
Date: Fri, 11 Jul 2014 22:39:07 -0400
Subject: [PATCH] do not switch connection when in a transaction.

---
 framework/db/Command.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/framework/db/Command.php b/framework/db/Command.php
index ccd44a7..79d3c54 100644
--- a/framework/db/Command.php
+++ b/framework/db/Command.php
@@ -160,6 +160,10 @@ class Command extends \yii\base\Component
 
         $sql = $this->getSql();
 
+        if ($this->db->getTransaction()) {
+            // master is in a transaction. use the same connection.
+            $forRead = false;
+        }
         if ($forRead || $forRead === null && $this->db->getSchema()->isReadQuery($sql)) {
             $pdo = $this->db->getSlavePdo();
         } else {