Dynamic error pages in Rails 3

Question

In Rails 2.3.x, you can override render_optional_error_file like so:

# ApplicationController.rb
protected
  def render_optional_error_file(statu         


        

Answer 1

In rails 3.2, it's easier than that:

Add this to config/application.rb:

config.exceptions_app = self.routes

That causes errors to be routed via the router. Then you just add to config/routes.rb:

match "/404", :to => "errors#not_found"

I got this info from item #3 on the blog post "My five favorite hidden features in Rails 3.2" by By José Valim.