1 files changed, 8 insertions, 4 deletions
diff --git a/public/app/controllers/admin/Course_admin.php b/public/app/controllers/admin/Course_admin.php
index c2e06f2..72ddc79 100644
--- a/public/app/controllers/admin/Course_admin.php
+++ b/public/app/controllers/admin/Course_admin.php
@@ -213,8 +213,10 @@ class Course_admin {
             ]
         );
 
-        // update media's privileges
-        self::update_medias_privileges($post['media'], $post['privilege_id']);
+        if (isset($post['media'])) {
+            // update media's privileges
+            self::update_medias_privileges($post['media'], $post['privilege_id']);
+        }
 
         // remove all old lesson's links to media files
         Registry::use('database')->runQuery(
@@ -222,8 +224,10 @@ class Course_admin {
             [ ':lesson' => $post['id'] ]
         );
 
-        // update lesson's media files
-        self::create_medias_for_lesson($post['media'], $post['id'], $post['privilege_id']);
+        if (isset($post['media'])) {
+            // update lesson's media files
+            self::create_medias_for_lesson($post['media'], $post['id'], $post['privilege_id']);
+        }
 
         return true;
     }