How can I handle errors in a Ruby on Rails application?

How can I handle errors in a Ruby on Rails application?

In Rails, you can handle errors using rescue blocks, custom error classes, and middleware. Would you like examples?

Yes, please provide an example of using rescue blocks.

Sure! You can use a rescue block in your controller like this:

begin
  # code that might raise an error
rescue StandardError => e
  # handle the error
  flash[:error] = e.message
  redirect_to some_path
end

What about custom error classes?

You can create custom error classes by defining a new class that inherits from StandardError. For example:

class CustomError < StandardError; end

Then, you can raise this error in your application.