From c8423340039ff650dfd6af32d56b109657aed34a Mon Sep 17 00:00:00 2001
From: Faris Ansari <netchamp.faris@gmail.com>
Date: Wed, 6 May 2020 23:48:19 +0530
Subject: [PATCH] fix: Handle null table

---
 model/document.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/model/document.js b/model/document.js
index 5bd4c1fc..237c1c54 100644
--- a/model/document.js
+++ b/model/document.js
@@ -636,7 +636,7 @@ module.exports = class BaseDocument extends Observable {
 
   // helper functions
   getSum(tablefield, childfield) {
-    return this[tablefield]
+    return (this[tablefield] || [])
       .map(d => parseFloat(d[childfield], 10) || 0)
       .reduce((a, b) => a + b, 0);
   }