Rails error routing issue (blank page)

Question

having a weird issue with Rails (3.2.15)

I messed around with nicer error pages, but as that was suppressing ALL errors at one point I needed to revert so I can see errors in the log files.

I had:

• installed gem: 'exception_notification'
• added initialisation code for that in the relevant environment file (config.middleware...)
• added routes to catch errors 'get '/500', :to => 'errors#server_error' ', same for 404/422
• added rescue statements in application controller "rescue_from Exception, with: lambda { |exception| render_error 500, exception }" etc, same for 404 and render method to render custom pages

Now, I didn't want any of that any more as stated, so I have removed all of the above, ran bundle install, etc. and deployed to my staging environment.

However, NOW I get blank pages on any errors (500 or 404), I don't see that standard rails 'Something went wrong page' at all, (though it is still in /public)

I don't understand why I'm not back at the default error handling, I have no 'rescue' statements anywhere, and no routes that mess with errors.

The log file on 500 shows the full error that occurs and then just: rendered [page I was trying to see] within layouts/application (50.4ms) "Completed 500 Internal Server Error in 184.9ms" [error details]

Why am I not getting my default Rails error behaviour, I'm not sure what I'm missing here??

Any suggestions greatly appreciated!!

Answer 1

turned out I had forgotten to remove this line in config/application.rb :

config.exceptions_app = self.routes

since I removed any routes to do with errors it was therefore showing blank pages.

d'oh