Time-stamped Column

Records modified time for individual columns.

Usage (in a model)

timestamped_column :email_address

Records the most recent modification time of :email_address to :email_address_updated_at (defaults to name_updated_at)

timestamped_column :email_address, :column => :email_address_changed_at

Records the most recent modification time of :email_address to :email_address_changed_at