Rails,在模型中是否有一种方法可以提供自上次更新以来的难度？

class User< ApplicationRecord
  include ActiveModel::Dirty

  # 在模型中添加属性变更检测
  after_initialize :initialize_changed_attributes
  before_save :reset_changed_attributes

  def initialize_changed_attributes
    @changed_attributes = {}
  end

  def reset_changed_attributes
    @changed_attributes = {}
  end

  def attribute_will_change!(attr_name)
    @changed_attributes[attr_name] = send(attr_name)
    super
  end

  def changes_since_last_update
    changes
  end
end

user = User.find(1)
user.name = "John Doe"
user.email = "john.doe@example.com"
user.changes_since_last_update
# 输出：{ "name" => ["Jane Doe", "John Doe"], "email" => ["jane.doe@example.com", "john.doe@example.com"] }