Rescue from dispatching
Published over 5 years ago

This question gets asked quite a few times, if there’s an easy way to handle exceptions raised while dispatching a request (routing exceptions, invalid method etc.) gracefully and show a customized error page. After this commit, there is.

rescue_from to the rescue

Now you can handle those exceptions inside your application.rb like :

class ApplicationController < ActionController::Base
  rescue_from ActionController::RoutingError, :with => :route_not_found
  rescue_from ActionController::MethodNotAllowed, :with => :invalid_method

  private

  def route_not_found
    render :text => 'What the fuck are you looking for ?', :status => :not_found
  end

  def invalid_method
    message = "Now, did your mom tell you to #{request.request_method.to_s.upcase} that ?"
    render :text => message, :status => :method_not_allowed
  end
end

Just make sure you don’t raise another exception from your rescue_from action!