From b301ba1f57b884248def367126a9a76e256c46b8 Mon Sep 17 00:00:00 2001
From: Rogan <quangenw@gmail.com>
Date: Wed, 26 Jul 2017 12:05:31 +0800
Subject: [PATCH] Datasource cannot be empty (#3035)

---
 superset/assets/javascripts/explore/stores/controls.jsx | 1 +
 1 file changed, 1 insertion(+)

diff --git a/superset/assets/javascripts/explore/stores/controls.jsx b/superset/assets/javascripts/explore/stores/controls.jsx
index ecfbfe9e64..1fdf868df2 100644
--- a/superset/assets/javascripts/explore/stores/controls.jsx
+++ b/superset/assets/javascripts/explore/stores/controls.jsx
@@ -35,6 +35,7 @@ export const controls = {
     isLoading: true,
     clearable: false,
     default: null,
+    validators: [v.nonEmpty],
     mapStateToProps: (state) => {
       const datasources = state.datasources || [];
       return {