From ef1dc4612d3643b61f9b20ac5d4d70807a08edad Mon Sep 17 00:00:00 2001
From: Alexander Wang <alex@terrastruct.com>
Date: Thu, 9 Feb 2023 19:02:21 -0800
Subject: [PATCH] check root another way

---
 d2chaos/d2chaos_test.go | 4 ++++
 d2ir/d2ir.go            | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/d2chaos/d2chaos_test.go b/d2chaos/d2chaos_test.go
index 8b73e4e82..ad7343b5a 100644
--- a/d2chaos/d2chaos_test.go
+++ b/d2chaos/d2chaos_test.go
@@ -169,6 +169,10 @@ func testPinned(t *testing.T, outDir string) {
 			name: "orientation",
 			text: "a: {\n  b\n  c\n }\n  a <- a.c\n  a.b -> a\n",
 		},
+		{
+			name: "cannot create edge between boards",
+			text: `"" <-> ""`,
+		},
 	}
 
 	for _, tc := range testCases {
diff --git a/d2ir/d2ir.go b/d2ir/d2ir.go
index 1a90d8d5c..455a38707 100644
--- a/d2ir/d2ir.go
+++ b/d2ir/d2ir.go
@@ -233,7 +233,7 @@ func NodeBoardKind(n Node) BoardKind {
 	var f *Field
 	switch n := n.(type) {
 	case *Field:
-		if n.Name == "" {
+		if n.parent == nil {
 			return BoardLayer
 		}
 		f = ParentField(n)