From a1fdad7e0abdc0a13eeb4645c5a65f324a57d737 Mon Sep 17 00:00:00 2001
From: Daniel <845765@qq.com>
Date: Fri, 6 Dec 2024 09:47:00 +0800
Subject: [PATCH] :bug: Markdown import fails when tag is empty
 https://github.com/siyuan-note/siyuan/issues/13382

---
 kernel/model/box.go | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/kernel/model/box.go b/kernel/model/box.go
index 2425af4e24b..56ba8cb36c0 100644
--- a/kernel/model/box.go
+++ b/kernel/model/box.go
@@ -596,7 +596,7 @@ func normalizeTree(tree *parse.Tree) (yfmRootID, yfmTitle, yfmUpdated string) {
 					}
 					continue
 				}
-				if "tags" == attrK {
+				if "tags" == attrK && nil != attrV {
 					var tags string
 					if str, ok := attrV.(string); ok {
 						tags = strings.TrimSpace(str)
@@ -614,7 +614,10 @@ func normalizeTree(tree *parse.Tree) (yfmRootID, yfmTitle, yfmUpdated string) {
 						tags += tagStr + ","
 					}
 					tags = strings.TrimRight(tags, ",")
-					tree.Root.SetIALAttr("tags", tags)
+					tags = strings.TrimSpace(tags)
+					if "" != tags {
+						tree.Root.SetIALAttr("tags", tags)
+					}
 					continue
 				}