From f055231e526823feed98202e372d60f0aab24eb8 Mon Sep 17 00:00:00 2001
From: David Aaron Suddjian <1858430+suddjian@users.noreply.github.com>
Date: Tue, 3 Dec 2019 15:30:12 -0800
Subject: [PATCH] require a series on a bar chart in the UI (#8726)

---
 superset/assets/src/explore/controlPanels/DistBar.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/superset/assets/src/explore/controlPanels/DistBar.js b/superset/assets/src/explore/controlPanels/DistBar.js
index 41b944e1c..06f58dffd 100644
--- a/superset/assets/src/explore/controlPanels/DistBar.js
+++ b/superset/assets/src/explore/controlPanels/DistBar.js
@@ -17,6 +17,7 @@
  * under the License.
  */
 import { t } from '@superset-ui/translation';
+import { nonEmpty } from '../validators';
 
 export default {
   controlPanelSections: [
@@ -55,6 +56,7 @@ export default {
   controlOverrides: {
     groupby: {
       label: t('Series'),
+      validators: [nonEmpty],
     },
     columns: {
       label: t('Breakdowns'),