From 0fab5ea3d3a4b3555b04d3bfb3bc6d257194aae0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Iv=C3=A1n=20Ovejero?= <ivov.src@gmail.com>
Date: Wed, 15 Oct 2025 09:45:03 +0200
Subject: [PATCH] fix(editor): Disallow drag-and-drop for
 non-immediate-ancestors of Python code node (#20773)

---
 .../components/CodeNodeEditor/utils.test.ts   | 30 +++++++++++++++++++
 .../components/CodeNodeEditor/utils.ts        |  3 ++
 2 files changed, 33 insertions(+)

diff --git a/packages/frontend/editor-ui/src/features/editors/components/CodeNodeEditor/utils.test.ts b/packages/frontend/editor-ui/src/features/editors/components/CodeNodeEditor/utils.test.ts
index 1a738706116..0bfeb20aaba 100644
--- a/packages/frontend/editor-ui/src/features/editors/components/CodeNodeEditor/utils.test.ts
+++ b/packages/frontend/editor-ui/src/features/editors/components/CodeNodeEditor/utils.test.ts
@@ -123,6 +123,36 @@ const y = f({ a: 'c' })
 					valueToInsert('{{ $json.foo.bar[0].baz }}', 'pythonNative', 'runOnceForEachItem'),
 				).toBe('{{ _item["json"]["foo"]["bar"][0]["baz"] }}');
 			});
+
+			it('should return empty string for specific node references (single quotes), runOnceForAllItems', () => {
+				expect(
+					valueToInsert(
+						"{{ $('Some Previous Node').item.json.foo.bar[0].baz }}",
+						'pythonNative',
+						'runOnceForAllItems',
+					),
+				).toBe('');
+			});
+
+			it('should return empty string for specific node references (double quotes), runOnceForAllItems', () => {
+				expect(
+					valueToInsert(
+						'{{ $("Some Previous Node").item.json.foo.bar[0].baz }}',
+						'pythonNative',
+						'runOnceForAllItems',
+					),
+				).toBe('');
+			});
+
+			it('should return empty string for specific node references, runOnceForEachItem', () => {
+				expect(
+					valueToInsert(
+						"{{ $('Some Previous Node').item.json.foo.bar[0].baz }}",
+						'pythonNative',
+						'runOnceForEachItem',
+					),
+				).toBe('');
+			});
 		});
 	});
 });
diff --git a/packages/frontend/editor-ui/src/features/editors/components/CodeNodeEditor/utils.ts b/packages/frontend/editor-ui/src/features/editors/components/CodeNodeEditor/utils.ts
index d752eafe9e5..d152b7ce6f3 100644
--- a/packages/frontend/editor-ui/src/features/editors/components/CodeNodeEditor/utils.ts
+++ b/packages/frontend/editor-ui/src/features/editors/components/CodeNodeEditor/utils.ts
@@ -67,6 +67,9 @@ const toBracketNotation = (input: string): string => {
 };
 
 const pythonInsert = (value: string, mode: CodeExecutionMode): string => {
+	// Python supports only direct parent node references
+	if (value.includes('$(')) return '';
+
 	const base =
 		mode === 'runOnceForAllItems'
 			? value.replace('$json', '_items[0]["json"]')