From ea8aeafdb7fe8f84132cbe0303bf049671baf509 Mon Sep 17 00:00:00 2001
From: cxt <853663049@qq.com>
Date: Fri, 28 Feb 2020 10:09:44 +0800
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---
 app/models/course.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/models/course.rb b/app/models/course.rb
index 38769ba07..f7db61995 100644
--- a/app/models/course.rb
+++ b/app/models/course.rb
@@ -260,7 +260,7 @@ class Course < ApplicationRecord
     member = user.is_a?(CourseMember) ? user : course_member(user&.id)
     group_ids = if member.present?
                   member.teacher_course_groups.size > 0 ? member.teacher_course_groups.pluck(:course_group_id) : course_groups.pluck(:id)
-                elsif user.admin_or_business?
+                elsif user&.admin_or_business?
                   course_groups.pluck(:id)
                 else
                   []