From 446c1010185bd7ca836e686d6513f8d7c07828c5 Mon Sep 17 00:00:00 2001
From: Erdenezul Batmunkh <erdenezul.b@gmail.com>
Date: Wed, 23 May 2018 15:53:30 +0800
Subject: [PATCH] dont call ensure_indexes on slave #1338

---
 mongoengine/document.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mongoengine/document.py b/mongoengine/document.py
index 109f8f82..7d03bd60 100644
--- a/mongoengine/document.py
+++ b/mongoengine/document.py
@@ -195,7 +195,9 @@ class Document(BaseDocument):
 
             # Ensure indexes on the collection unless auto_create_index was
             # set to False.
-            if cls._meta.get('auto_create_index', True):
+            # Also there is no need to ensure indexes on slave.
+            if cls._meta.get('auto_create_index', True) and\
+                    db.client.is_primary:
                 cls.ensure_indexes()
 
         return cls._collection