From 3edafdd21f43305d3c75fce882757e7f96d4aa1d Mon Sep 17 00:00:00 2001
From: Liang Ding <d@b3log.org>
Date: Mon, 5 Sep 2022 11:59:22 +0800
Subject: [PATCH] =?UTF-8?q?:bug:=20=E6=8C=82=E4=BB=B6=E7=A7=BB=E5=8A=A8?=
 =?UTF-8?q?=E6=88=96=E8=AE=BE=E7=BD=AE=E5=A4=A7=E5=B0=8F=E5=90=8E=E5=B1=9E?=
 =?UTF-8?q?=E6=80=A7=E4=B8=A2=E5=A4=B1=20Fix=20https://github.com/siyuan-n?=
 =?UTF-8?q?ote/siyuan/issues/4885?=
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---
 kernel/model/transaction.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/kernel/model/transaction.go b/kernel/model/transaction.go
index 54e182a8d..8bc11b866 100644
--- a/kernel/model/transaction.go
+++ b/kernel/model/transaction.go
@@ -904,6 +904,17 @@ func (tx *Transaction) doUpdate(operation *Operation) (ret *TxErr) {
 		treenode.MoveFoldHeading(updatedNode, oldNode)
 	}
 
+	// 挂件移动或设置大小后属性丢失 https://github.com/siyuan-note/siyuan/issues/4885
+	// 这里需要把旧节点的属性复制到新节点上，避免属性丢失
+	oldIAL := parse.IAL2Map(oldNode.KramdownIAL)
+	newIAL := parse.IAL2Map(updatedNode.KramdownIAL)
+	for oldIALKey, oldIALVal := range oldIAL {
+		if strings.HasPrefix(oldIALKey, "custom-") {
+			newIAL[oldIALKey] = oldIALVal
+		}
+	}
+	updatedNode.KramdownIAL = parse.Map2IAL(newIAL)
+
 	cache.PutBlockIAL(updatedNode.ID, parse.IAL2Map(updatedNode.KramdownIAL))
 
 	// 替换为新节点