add small validation

key4hep · Aug 8, 2024 · 18119d5 · 18119d5
1 parent 109b985
commit 18119d5
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/js/views/templates/onewayview.js b/js/views/templates/onewayview.js
@@ -5,6 +5,10 @@ export function oneWayView(viewObjects, fromCollectionName, relationName) {
   const fromCollection = relations.map((relation) => relation.from);
   const toCollection = relations.map((relation) => relation.to);
 
+  if (fromCollection.length === 0 || toCollection.length === 0) {
+    return [0, 0];
+  }
+
   const fromWidth = fromCollection[0].width;
   const toWidth = toCollection[0].width;
   const fromHorizontalGap = 0.3 * fromWidth;