bug fixed - when piechart has no data

1 files changed, 2 insertions, 2 deletions

diff --git a/src/client/views/nodes/DataVizBox/components/PieChart.tsx b/src/client/views/nodes/DataVizBox/components/PieChart.tsx
index 3819c2f82..5c341e0b4 100644
--- a/src/client/views/nodes/DataVizBox/components/PieChart.tsx
+++ b/src/client/views/nodes/DataVizBox/components/PieChart.tsx
@@ -97,9 +97,9 @@ export class PieChart extends ObservableReactComponent<PieChartProps> {
             { fireImmediately: true }
         );
         // restore selected slices
-        let key = Object.keys(this._pieChartData[0])[0]
         var svg = this._piechartSvg;
-        if (svg) {
+        if (svg && this._pieChartData[0]) {
+            let key = Object.keys(this._pieChartData[0])[0]
             const selectedDataBars = StrListCast(this._props.layoutDoc.dataViz_pie_selectedData)
             svg.selectAll('path').attr('class', (d: any) => {
                 let selected = false;