returns nil without active record error

Author: madoleary

app/helpers/application_helper.rb

@@ -80,7 +80,7 @@ def username(user_str)
     user_id = user_str.to_i
     return 'you' if user_id && current_user && user_id == current_user.id
 
-    user = User.find(user_id)
+    user = User.find_by(id: user_id)
     return raw user.username + ' <sup>(' + user.id.to_s + ')</sup>' || 'user ' + user.id.to_s if user&.username && user&.id
 
     user_str