Merge pull request #27729 from nextcloud/revert-26587-backport/26581/stable21

[stable21] Revert "Fix constraint violation detection in QB Mapper"

Author: skjnldsv

lib/public/AppFramework/Db/QBMapper.php

@@ -30,7 +30,7 @@
 
 namespace OCP\AppFramework\Db;
 
-use OCP\DB\Exception;
+use Doctrine\DBAL\Exception\UniqueConstraintViolationException;
 use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\IDBConnection;
 
@@ -162,11 +162,8 @@ public function insert(Entity $entity): Entity {
 	public function insertOrUpdate(Entity $entity): Entity {
 		try {
 			return $this->insert($entity);
-		} catch (Exception $ex) {
-			if ($ex->getReason() === Exception::REASON_UNIQUE_CONSTRAINT_VIOLATION) {
-				return $this->update($entity);
-			}
-			throw $ex;
+		} catch (UniqueConstraintViolationException $ex) {
+			return $this->update($entity);
 		}
 	}