From 86a0f5fdad48719ccf3b2b48e2ff2c69f9c6a851 Mon Sep 17 00:00:00 2001
From: Jan-Hendrik Willms <tleilax+studip@gmail.com>
Date: Wed, 11 May 2022 10:14:52 +0000
Subject: [PATCH] add migration that removes column termine.topic_id, fixes
#881
Closes #881
Merge request studip/studip!519
---
...0220524_remove_column_termine_topic_id.php | 41 +++++++++++++++++++
1 file changed, 41 insertions(+)
create mode 100644 db/migrations/20220524_remove_column_termine_topic_id.php
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 00000000000..992e765e2d8
--- /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]);
+ }
+}
--
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