From 869993afa8f88d4ad97ca173fb056c3b37592477 Mon Sep 17 00:00:00 2001
From: Marcin Kuzminski <marcin@rhodecode.com>
Date: Thu, 26 Dec 2019 19:05:36 +0100
Subject: [PATCH] pagination: handle empty sets of data in sqlPaginator for
 backward compat.

---
 rhodecode/lib/pagination.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/rhodecode/lib/pagination.py b/rhodecode/lib/pagination.py
index e93dced7..88e5baa5 100644
--- a/rhodecode/lib/pagination.py
+++ b/rhodecode/lib/pagination.py
@@ -911,6 +911,10 @@ class SqlalchemyOrmWrapper(object):
         return self.collection[range]
 
     def __len__(self):
+        # support empty types, without actually making a query.
+        if self.collection is None or self.collection == []:
+            return 0
+
         # Count the number of objects in an sqlalchemy.orm.query.Query object
         return self.collection.count()