After upgrading a rails 1.2 website to 2.1, the ExceptionNotifier plugin no longer works, complaining about this error:
ActionView::TemplateFinder::InvalidViewPath: Unprocessed view path found: "/path/to/appname/vendor/plugins/exception_notification/lib/../views". Set your view paths with #append_view_path, #prepend_view_path, or #view_paths=.
What causes it and how do I fix it?
You ought to upgrade to the newest Exception Notification plugin which is in its new home at GitHub.
This was caused by a change in rails 2.1 which prevents rails from loading views from any arbitrary path for security reasons.
There is now an updated version of the plugin on github, so the solution is to use that.
The old solution here for posterity
To work around it, edit
init.rb under your
vendor/plugins/exception_notification directory, and add the following code to the end
ActionController::Base.class_eval do append_view_path File.dirname(__FILE__) + '/lib/../views' end
This adds the ExceptionNotifier plugins' views folder to the list, so it is allowed to load them.