From 78d74d1ea1b9ce7f2f7e7dcdc3cddf38c353d8f6 Mon Sep 17 00:00:00 2001
From: Ferdinand Thiessen <opensource@fthiessen.de>
Date: Fri, 12 Sep 2025 12:53:36 +0200
Subject: [PATCH] fix(ownCloud): ensure that `accounts.display_name` fits into
 `users.displayname`

- manual backport of https://github.com/nextcloud/server/pull/55006

Needed because we recommend to do migrations from OC 10.x to NC 25 ...

Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>
---
 lib/private/Repair/Owncloud/SaveAccountsTableData.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/private/Repair/Owncloud/SaveAccountsTableData.php b/lib/private/Repair/Owncloud/SaveAccountsTableData.php
index 13677d80de0..0e67a6d43b1 100644
--- a/lib/private/Repair/Owncloud/SaveAccountsTableData.php
+++ b/lib/private/Repair/Owncloud/SaveAccountsTableData.php
@@ -191,7 +191,8 @@ class SaveAccountsTableData implements IRepairStep {
 		}
 
 		if ($userdata['display_name'] !== null) {
-			$update->setParameter('displayname', $userdata['display_name'])
+			// user.displayname only allows 64 characters but old accounts.display_name allowed 255 characters
+			$update->setParameter('displayname', mb_substr($userdata['display_name'], 0, 64))
 				->setParameter('userid', $userdata['user_id']);
 			$update->execute();
 		}