以下是它应该如何使用：

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 catched! #{exception.class}: #{exception.message}"
  end
end

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

字符串
不用说，营救Exception是一种犯罪。