From 16e655cedbc8e5eaf222f0fcb512c75bd9b11556 Mon Sep 17 00:00:00 2001
From: Git'Fellow <12234510+solracsf@users.noreply.github.com>
Date: Tue, 11 Aug 2026 11:49:11 +0100
Subject: [PATCH] fix(migration): stop using the removed
 IIndex::hasColumnAtPosition()

Signed-off-by: Git'Fellow <12234510+solracsf@users.noreply.github.com>
---
 .../Version01022Date20221202161257.php        | 27 ++++++++++++++++---
 1 file changed, 23 insertions(+), 4 deletions(-)

diff --git a/lib/Migration/Version01022Date20221202161257.php b/lib/Migration/Version01022Date20221202161257.php
index 50a66cd65..bb496f042 100644
--- a/lib/Migration/Version01022Date20221202161257.php
+++ b/lib/Migration/Version01022Date20221202161257.php
@@ -37,18 +37,19 @@ public function changeSchema(IOutput $output, Closure $schemaClosure, array $opt
 			$table = $schema->getTable('user_oidc_sessions');
 			$indexes = $table->getIndexes();
 			foreach ($indexes as $index) {
+				$columns = $index->getColumns();
 				// fix created_at index which is not unique
-				if ($index->isUnique() && $index->hasColumnAtPosition('created_at')) {
+				if ($index->isUnique() && $this->startsWithColumn($columns, 'created_at')) {
 					$table->dropIndex($index->getName());
 					$table->addIndex(['created_at'], 'user_oidc_sess_crat');
 					$somethingChanged = true;
 				}
 				// rename indexes on sid and nc_session_id if needed
-				if ($index->isUnique() && $index->hasColumnAtPosition('sid') && $index->getName() !== 'user_oidc_sess_sid') {
+				if ($index->isUnique() && $this->startsWithColumn($columns, 'sid') && $index->getName() !== 'user_oidc_sess_sid') {
 					$table->renameIndex($index->getName(), 'user_oidc_sess_sid');
 					$somethingChanged = true;
 				}
-				if ($index->isUnique() && $index->hasColumnAtPosition('nc_session_id') && $index->getName() !== 'user_oidc_sess_sess_id') {
+				if ($index->isUnique() && $this->startsWithColumn($columns, 'nc_session_id') && $index->getName() !== 'user_oidc_sess_sess_id') {
 					$table->renameIndex($index->getName(), 'user_oidc_sess_sess_id');
 					$somethingChanged = true;
 				}
@@ -59,8 +60,9 @@ public function changeSchema(IOutput $output, Closure $schemaClosure, array $opt
 			$table = $schema->getTable('user_oidc_providers');
 			$indexes = $table->getIndexes();
 			foreach ($indexes as $index) {
+				$columns = $index->getColumns();
 				// rename index on identifier if needed
-				if ($index->isUnique() && $index->hasColumnAtPosition('identifier') && $index->getName() !== 'user_oidc_prov_idtf') {
+				if ($index->isUnique() && $this->startsWithColumn($columns, 'identifier') && $index->getName() !== 'user_oidc_prov_idtf') {
 					$table->renameIndex($index->getName(), 'user_oidc_prov_idtf');
 					$somethingChanged = true;
 				}
@@ -69,4 +71,21 @@ public function changeSchema(IOutput $output, Closure $schemaClosure, array $opt
 
 		return $somethingChanged ? $schema : null;
 	}
+
+	/**
+	 * Whether the first column of an index is the given column.
+	 *
+	 * Replaces IIndex::hasColumnAtPosition() which was removed from the public
+	 * API in Nextcloud 35. Column names are compared like Doctrine did, without
+	 * quoting and case insensitively, so $columnName must be given lowercase.
+	 *
+	 * @param list<string> $indexColumns
+	 */
+	private function startsWithColumn(array $indexColumns, string $columnName): bool {
+		if ($indexColumns === []) {
+			return false;
+		}
+
+		return strtolower(str_replace(['`', '"', '[', ']'], '', $indexColumns[0])) === $columnName;
+	}
 }