> For the complete documentation index, see [llms.txt](https://ploegert.gitbook.io/til/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ploegert.gitbook.io/til/programmy/rails/rescue-from.md).

# Rescue From

The [`rescue_from`](http://api.rubyonrails.org/classes/ActiveSupport/Rescuable/ClassMethods.html) method, provided by `ActiveSupport`, is a handy way to provide a catch-all response to a particular exception in Rails controllers.

For instance, if many of the controllers in your application raise a `User::NotAuthorized` error for unauthorized requests, the `ApplicationController` can provide a unified response. This will help dry up your controllers and prevent any potential inconsistencies.

```ruby
class ApplicationController < ActionController::Base
  rescue_from User::NotAuthorized do |exception|
    # respond with some Not Authorized page
  end

  ...
end
```