prevent fatal error when booking user is missing, fixes #6012

Closes #6012

Merge request studip/studip!4588

1 files changed, 17 insertions, 0 deletions

diff --git a/db/migrations/5.4.21_cleanup_consultation_bookings.php b/db/migrations/5.4.21_cleanup_consultation_bookings.php
new file mode 100644
index 0000000..3c7d9f7
--- /dev/null
+++ b/db/migrations/5.4.21_cleanup_consultation_bookings.php
@@ -0,0 +1,17 @@
+<?php
+final class CleanupConsultationBookings extends Migration
+{
+    public function description()
+    {
+        return 'Removes orphaned entries from consultation_bookings';
+    }
+
+    protected function up()
+    {
+        $query = "DELETE `consultation_bookings`
+                  FROM `consultation_bookings`
+                  LEFT JOIN `auth_user_md5` USING (`user_id`)
+                  WHERE `auth_user_md5`.`user_id` IS NULL";
+        DBManager::get()->exec($query);
+    }
+}