fix: Chart crashing if timeseries_limit_metric is an empty array

superset-frontend/packages/superset-ui-chart-controls/src/operators/utils/extractExtraMetrics.ts

@@ -17,6 +17,7 @@
  * under the License.
  */
 import {
+  ensureIsArray,
   getMetricLabel,
   QueryFormData,
   QueryFormMetric,
@@ -27,13 +28,14 @@ export function extractExtraMetrics(
 ): QueryFormMetric[] {
   const { groupby, timeseries_limit_metric, x_axis_sort, metrics } = formData;
   const extra_metrics: QueryFormMetric[] = [];
+  const limitMetric = ensureIsArray(timeseries_limit_metric)[0];
   if (
     !(groupby || []).length &&
-    timeseries_limit_metric &&
-    getMetricLabel(timeseries_limit_metric) === x_axis_sort &&
+    limitMetric &&
+    getMetricLabel(limitMetric) === x_axis_sort &&
     !metrics?.some(metric => getMetricLabel(metric) === x_axis_sort)
   ) {
-    extra_metrics.push(timeseries_limit_metric);
+    extra_metrics.push(limitMetric);
   }
   return extra_metrics;
 }

superset-frontend/packages/superset-ui-chart-controls/test/operators/utils/extractExtraMetrics.test.ts

@@ -124,3 +124,13 @@ test('returns empty array if timeseries_limit_metric and x_axis_sort are include
     }),
   ).toEqual([]);
 });
+
+test('returns emoty array if timeseries_limit_metric is an empty array', () => {
+  expect(
+    extractExtraMetrics({
+      ...baseFormData,
+      // @ts-ignore
+      timeseries_limit_metric: [],
+    }),
+  ).toEqual([]);
+});