# Custom 500/Application Errors **URL:** \ **Category:** Deployment\ **Created:** [August 25, 2008, 9:34pm UTC](https://www.ruby-forum.com/t/custom-500-application-errors/146817 "2008-08-25T21:34:52Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![squeegy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dec6dc/32.png) [@squeegy](https://www.ruby-forum.com/u/squeegy)\ **Post date:** [August 25, 2008, 9:34pm UTC](https://www.ruby-forum.com/t/custom-500-application-errors/146817/1 "2008-08-25T21:34:52Z")
Hi, I’m working on creating custom 500 errors in rails 2.1. Specifically I’m trying to send an email with the exception every time an application error occurs. So I follow these instructions: [http://wiki.rubyonrails.org/rails/pages/HandlingPreControllerErrors](http://wiki.rubyonrails.org/rails/pages/HandlingPreControllerErrors) It tells me to put an error handler in /lib/ then require it in environment.rb. HOWEVER, when I past it’s code, creating something called an “ActionController”, I can no longer start mongrel. Because of “uninitialized constant ActionController” Whats the deal? Please help! Thank you ---
**Author:** ![squeegy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dec6dc/32.png) [@squeegy](https://www.ruby-forum.com/u/squeegy)\ **Post date:** [August 25, 2008, 10:14pm UTC](https://www.ruby-forum.com/t/custom-500-application-errors/146817/2 "2008-08-25T22:14:18Z")
On Mon, Aug 25, 2008 at 12:34 PM, Alex Williams [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > environment.rb. > > HOWEVER, when I past it’s code, creating something called an > “ActionController”, I can no longer start mongrel. Because of > “uninitialized constant ActionController” > > Whats the deal? > > Please help! Alex, There are a few options for this. The typical solution is to use the Exception Notification plugin. - [GitHub - rails/exception\_notification: NOTICE: official repository moved to https://github.com/smartinez87/exception\_notification](http://github.com/rails/exception_notification/) This plugin will let you define email recipients to direct exceptions/errors to. You can take a look at the README for instructions on installing and configuring. Additionally, there are also a few web services that provide APIs that you can direct exceptions to. I’ve been a beta tester for Exceptional, which our team is using across five client projects in production right now with great success. You might look at this as a solution once they open it up to more customers. - [http://getexceptional.com/](http://getexceptional.com/) Another new comer to this arena is Hoptoad, which I haven’t had a chance to play with yet. - [http://www.hoptoadapp.com/](http://www.hoptoadapp.com/) Good luck! Cheers, Robby – Robby R. Chief Evangelist, Partner PLANET ARGON, LLC design // development // hosting > **[Planet Argon](https://www.planetargon.com/)** > > Planet Argon is a Ruby on Rails development agency specializing in maintenance and support for existing Rails apps. Based in Portland, OR, Planet Argon has been a member of the Rails community since 2004. [http://www.robbyonrails.com/](http://www.robbyonrails.com/) aim: planetargon +1 503 445 2457 +1 877 55 ARGON [toll free] +1 815 642 4068 [fax] ---
**Author:** ![squeegy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dec6dc/32.png) [@squeegy](https://www.ruby-forum.com/u/squeegy)\ **Post date:** [August 25, 2008, 11:05pm UTC](https://www.ruby-forum.com/t/custom-500-application-errors/146817/3 "2008-08-25T23:05:44Z")
Robby R. wrote: > On Mon, Aug 25, 2008 at 12:34 PM, Alex Williams > [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > environment.rb. > > > > HOWEVER, when I past it’s code, creating something called an > > “ActionController”, I can no longer start mongrel. Because of > > “uninitialized constant ActionController” > > > > Whats the deal? > > > > Please help! > > Alex, > > There are a few options for this. The typical solution is to use the > Exception Notification plugin. > > - [GitHub - rails/exception\_notification: NOTICE: official repository moved to https://github.com/smartinez87/exception\_notification](http://github.com/rails/exception_notification/) > > This plugin will let you define email recipients to direct > exceptions/errors to. You can take a look at the README for > instructions on installing and configuring. > > Additionally, there are also a few web services that provide APIs that > you can direct exceptions to. I’ve been a beta tester for Exceptional, > which our team is using across five client projects in production > right now with great success. You might look at this as a solution > once they open it up to more customers. > > - [http://getexceptional.com/](http://getexceptional.com/) > > Another new comer to this arena is Hoptoad, which I haven’t had a > chance to play with yet. > > - [http://www.hoptoadapp.com/](http://www.hoptoadapp.com/) > > Good luck! > > Cheers, > Robby > > – > Robby R. > Chief Evangelist, Partner > > PLANET ARGON, LLC > design // development // hosting > > [http://www.planetargon.com/](http://www.planetargon.com/) > [http://www.robbyonrails.com/](http://www.robbyonrails.com/) > aim: planetargon > > +1 503 445 2457 > +1 877 55 ARGON [toll free] > +1 815 642 4068 [fax] Thank you for the Fast response. I am trying to install exception\_notifier. Now it isn’t working, but I have a feeling it’s something simple I just don’t know about. I downloaded exception\_notifier and put it in my plugins folder like the reset of 'em are. I pasted the line: include ExceptionNotifiable in my application folder as asked. then I added this to environment.rb: ExceptionNotifier.exception\_recipients = %w(removed\_email\_address@domain.invalid removed\_email\_address@domain.invalid) Essentially I was just testing defaults. However, I receive the error “uninitialized constant ExceptionNotifier” So what do I need to do to get ExceptionNotifier working? It may be something I simply don’t understand about installing plugins this way. Thank you I hope hear from you. ---
**Author:** ![squeegy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dec6dc/32.png) [@squeegy](https://www.ruby-forum.com/u/squeegy)\ **Post date:** [August 25, 2008, 11:43pm UTC](https://www.ruby-forum.com/t/custom-500-application-errors/146817/4 "2008-08-25T23:43:00Z")
Robby R. wrote: > On Mon, Aug 25, 2008 at 2:05 PM, Alex Williams > [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > > > > > > > > > - [GitHub - rails/exception\_notification: NOTICE: official repository moved to https://github.com/smartinez87/exception\_notification](http://github.com/rails/exception_notification/) > > > > > > Robby > > > [http://www.planetargon.com/](http://www.planetargon.com/) > > > > I downloaded exception\_notifier and put it in my plugins folder like the > > reset of 'em are. I pasted the line: > > > > include ExceptionNotifiable > > > > in my application folder as asked. > > Just to clarify… you meant application controller? > > > Essentially I was just testing defaults. However, I receive the error > > “uninitialized constant ExceptionNotifier” > > Hmm, I don’t think that you need to require this in your > environment.rb. It might not be initializing the plugin. > > Robby > > – > Robby R. > Chief Evangelist, Partner > > PLANET ARGON, LLC > design // development // hosting > > [http://www.planetargon.com/](http://www.planetargon.com/) > [http://www.robbyonrails.com/](http://www.robbyonrails.com/) > aim: planetargon > > +1 503 445 2457 > +1 877 55 ARGON [toll free] > +1 815 642 4068 [fax] Yes application controller, sorry 🙂 I’m follow the instructions from the website you posted. Here they are: * * * First, include the ExceptionNotifiable mixin in whichever controller you want to generate error emails (typically ApplicationController): class ApplicationController \< ActionController::Base include ExceptionNotifiable … end Then, specify the email recipients in your environment: ExceptionNotifier.exception\_recipients = %w(removed\_email\_address@domain.invalid removed\_email\_address@domain.invalid) ## And that’s it! The defaults take care of the rest. But again it isn’t initializing “ExceptionNotifier”, so what should I do? I put the download right into the plugins folder so it looks like: /plugins/exception\_notfier/ lib test views INIT.rb README ---
**Author:** ![squeegy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dec6dc/32.png) [@squeegy](https://www.ruby-forum.com/u/squeegy)\ **Post date:** [August 25, 2008, 11:19pm UTC](https://www.ruby-forum.com/t/custom-500-application-errors/146817/5 "2008-08-25T23:19:55Z")
On Mon, Aug 25, 2008 at 2:05 PM, Alex Williams [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > > > > > - [GitHub - rails/exception\_notification: NOTICE: official repository moved to https://github.com/smartinez87/exception\_notification](http://github.com/rails/exception_notification/) > > > > Robby > > [http://www.planetargon.com/](http://www.planetargon.com/) > > I downloaded exception\_notifier and put it in my plugins folder like the > reset of 'em are. I pasted the line: > > include ExceptionNotifiable > > in my application folder as asked. Just to clarify… you meant application controller? > Essentially I was just testing defaults. However, I receive the error > “uninitialized constant ExceptionNotifier” Hmm, I don’t think that you need to require this in your environment.rb. It might not be initializing the plugin. Robby – Robby R. Chief Evangelist, Partner PLANET ARGON, LLC design // development // hosting > **[Planet Argon](https://www.planetargon.com/)** > > Planet Argon is a Ruby on Rails development agency specializing in maintenance and support for existing Rails apps. Based in Portland, OR, Planet Argon has been a member of the Rails community since 2004. [http://www.robbyonrails.com/](http://www.robbyonrails.com/) aim: planetargon +1 503 445 2457 +1 877 55 ARGON [toll free] +1 815 642 4068 [fax] ---
**Author:** ![squeegy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dec6dc/32.png) [@squeegy](https://www.ruby-forum.com/u/squeegy)\ **Post date:** [September 19, 2009, 2:18pm UTC](https://www.ruby-forum.com/t/custom-500-application-errors/146817/6 "2009-09-19T14:18:41Z")
For anyone who happens across this searching for an answer (as I was) the solution is to restart the server. Seemed to do the trick in my case. ---
**Author:** ![squeegy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dec6dc/32.png) [@squeegy](https://www.ruby-forum.com/u/squeegy)\ **Post date:** [August 26, 2008, 8:31pm UTC](https://www.ruby-forum.com/t/custom-500-application-errors/146817/7 "2008-08-26T20:31:13Z")
Any ideas Robby?