global error handling in rails

rubyonrails-talk
1

Hey people,

I'm having a problem implementing global error handling in Rails.

I'm using "Agile Web Development with Rails", and on page 464 it has some code for implementing email notification of such errors via the rescue_action_in_public method globally in application.rb. I've implemented it, but I'm seeing this in my logs

NameError (uninitialized constant ActionWebService::Dispatcher::ActionController ::UnknownAction):

/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dep endencies.rb:100:in `const_missing'

    /app/controllers/application.rb:14:in `rescue_action_in_public' /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/re scue.rb:33:in `rescue_action'

And I'm getting "Application error (Rails)" in the browser.

Any suggestions?

Thanks, Mike

2

msoulier wrote:

NameError (uninitialized constant ActionWebService::Dispatcher::ActionController ::UnknownAction):

Apparently the problem is documented in the errata on the website for the book. This fixes the problem.

[msoulier@tigger papproach]$ hg diff -r 27 -r 28

diff -r 282a076a19ac -r f1f71757bb90 app/controllers/application.rb

--- a/app/controllers/application.rb Sun Sep 24 16:53:02 2006 -0400

+++ b/app/controllers/application.rb Thu Sep 28 20:27:56 2006 -0400

@@ -11,7 +11,7 @@ class ApplicationController < ActionCont

     def rescue_action_in_public(exception)

         case exception

- when ActiveRecord::RecordNotFound, ActionController::UnknownAction + when ActiveRecord::RecordNotFound, ::ActionController::UnknownAction              render(:file => "#{RAILS_ROOT}/public/404.html",

                    :status => "404 Not Found")

         else

I don't understand the fix, but it does work.

I don't suppose anyone can explain it.

Mike