From bec2e74dcbc3ef87e9fb3d8d097942c8467c968b Mon Sep 17 00:00:00 2001
From: braks <78412429+bcakmakoglu@users.noreply.github.com>
Date: Fri, 5 May 2023 09:24:36 +0200
Subject: [PATCH] fix(core): check if node exists during drag

Signed-off-by: braks <78412429+bcakmakoglu@users.noreply.github.com>
---
 packages/core/src/utils/drag.ts | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/packages/core/src/utils/drag.ts b/packages/core/src/utils/drag.ts
index 12c55bbc..f0a16de6 100644
--- a/packages/core/src/utils/drag.ts
+++ b/packages/core/src/utils/drag.ts
@@ -56,7 +56,15 @@ export function getEventHandlerParams({
   dragItems: NodeDragItem[]
   findNode: Actions['findNode']
 }): [GraphNode, GraphNode[]] {
-  const extendedDragItems: GraphNode[] = dragItems.map((n) => findNode(n.id)!)
+  const extendedDragItems = dragItems.reduce((acc, dragItem) => {
+    const node = findNode(dragItem.id)
+
+    if (node) {
+      acc.push(node)
+    }
+
+    return acc
+  }, [] as GraphNode[])
 
   return [id ? extendedDragItems.find((n) => n.id === id)! : extendedDragItems[0], extendedDragItems]
 }