Why including Rescuable module doesn't work?

Question

class MyKlass

  include ActiveSupport::Rescuable

  rescue_from Exception do
    return "rescued"
  end

  #other stuff
end

MyKlass is pure ruby object, but defined inside Rails application.

If I try to invoke MyKlass instance in rails console and then apply to it method which certainly should raise Exception, nothing happens other than error expected to be rescued.

Answer 1

Here is how it should be used:

class MyKlass
  include ActiveSupport::Rescuable
  # define a method, which will do something for you, when exception is caught
  rescue_from Exception, with: :my_rescue

  def some_method(&block)
    yield
  rescue Exception => exception
    rescue_with_handler(exception) || raise
  end

  # do whatever you want with exception, for example, write it to logs
  def my_rescue(exception)
    puts "Exception caught! #{exception.class}: #{exception.message}"
  end
end

MyKlass.new.some_method { 0 / 0 }
# Exception caught! ZeroDivisionError: divided by 0
#=> true

It goes without saying, that rescuing Exception is a crime.