From 640628f89c23eceb04f0eb66381e4f7a960950ef Mon Sep 17 00:00:00 2001
From: Alan Knowles <alan@roojs.com>
Date: Mon, 10 Feb 2020 14:36:53 +0800
Subject: [PATCH] Roo/form/ComboNested.js

---
 Roo/form/ComboNested.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Roo/form/ComboNested.js b/Roo/form/ComboNested.js
index 0e7828f8cd..c0d7ed82de 100644
--- a/Roo/form/ComboNested.js
+++ b/Roo/form/ComboNested.js
@@ -291,7 +291,8 @@ Roo.extend(Roo.form.ComboNested, Roo.form.ComboBox, {
         
         if (!ix.length) {
             this.setFromData({});
-            this.stores[opts.list+1].loadData( [] );
+            var str = this.stores[opts.list+1];
+            str.loadData( str.reader.readerType == 'json' ? { data : [] } : [] );
             return;
         }
         
-- 
2.39.2