rails/activesupport/CHANGELOG.md

• Added support for error dispatcher classes in ActiveSupport::Rescuable. Now it acts closer to Ruby's rescue.

  class BaseController < ApplicationController
    module ErrorDispatcher
      def self.===(other)
        Exception === other && other.respond_to?(:status)
      end
    end
  
    rescue_from ErrorDispatcher do |error|
      render status: error.status, json: { error: error.to_s }
    end
  end
  

  Genadi Samokovarov

• Added #verified and #valid_message? methods to ActiveSupport::MessageVerifier

  Previously, the only way to decode a message with ActiveSupport::MessageVerifier was to use #verify, which would raise an exception on invalid messages. Now #verified can also be used, which returns nil on messages that cannot be decoded.

  Previously, there was no way to check if a message's format was valid without attempting to decode it. #valid_message? is a boolean convenience method that checks whether the message is valid without actually decoding it.

  Logan Leger

Please check 4-2-stable for previous changes.