Prohibit some words from being saved

Question

• ruby 1.9.2p290
• rails 3.1.1

I have the following routes output:

http://localhost:3001/chefs/peter (shows the chef profile **based on username**)
http://localhost:3001/chefs/edit (can edit their profile if logged)

How to prevent user to create a username that already has a action name like edit?

Answer 1

I think there should be more than one solution but using exclusion validation should work.

validates :name, :exclusion => { :in => %w(edit show) }