From 00de9488baa4a491c8f33d03f38e15e4dca7f5bd Mon Sep 17 00:00:00 2001
From: Andrew Brown <drusepth@gmail.com>
Date: Fri, 12 Mar 2021 08:56:31 -0800
Subject: [PATCH] safety check

---
 app/helpers/application_helper.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index cfc59dfa..b181b3cc 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -27,7 +27,9 @@ module ApplicationHelper
     content_for(:title) { (parts << 'Notebook').join(' - ') } unless parts.empty?
   end
 
-  def clean_links html
+  def clean_links(html)
+    return '' if html.nil?
+
     html.gsub!(/\<a href=["'](.*?)["']\>(.*?)\<\/a\>/mi, '<a href="\1" rel="nofollow">\2</a>')
     html.html_safe
   end