allow booking separable rooms in courses, closes #639

Closes #639

Merge request studip/studip!4039

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/models/Course.php b/lib/models/Course.php
index 831fe07..d35c6c3 100644
--- a/lib/models/Course.php
+++ b/lib/models/Course.php
@@ -1997,7 +1997,7 @@ class Course extends SimpleORMap implements Range, PrivacyObject, StudipItem, Fe
         }
         $dates->uasort(function($a, $b) {
             return $a->date - $b->date
-                ?: strnatcasecmp($a->getRoomName(), $b->getRoomName());
+                ?: strnatcasecmp($a->getRoomNames(), $b->getRoomNames());
         });
         return $dates;
     }