diff --git a/db/migrations/20220524_remove_column_termine_topic_id.php b/db/migrations/20220524_remove_column_termine_topic_id.php new file mode 100644 index 0000000000000000000000000000000000000000..992e765e2d8481e2313b6d1811a69c0239c4686b --- /dev/null +++ b/db/migrations/20220524_remove_column_termine_topic_id.php @@ -0,0 +1,41 @@ +<?php +/** + * @see https://gitlab.studip.de/studip/studip/-/issues/881 + */ +final class RemoveColumnTermineTopicId extends Migration +{ + public function description() + { + return 'Removes unused column topic_id from table termine.'; + } + + protected function up() + { + if (!$this->columnExists('termine', 'topic_id')) { + $this->write("Column termine.topic_id does not exist"); + return; + } + + $query = "ALTER TABLE `termine` + DROP COLUMN `topic_id`"; + DBManager::get()->exec($query); + } + + protected function down() + { + if ($this->columnExists('termine', 'topic_id')) { + $this->write("Column termine.topic_id already exists"); + return; + } + + $query = "ALTER TABLE `termine` + ADD COLUMN `topic_id` VARCHAR(32) COLLATE latin1_bin DEFAULT NULL"; + DBManager::get()->exec($query); + } + + protected function columnExists(string $table, string $column): bool + { + $query = "SHOW COLUMNS FROM `{$table}` LIKE ?"; + return (bool) DBManager::get()->fetchOne($query, [$column]); + } +}