class ProjectObserver < ActiveRecord::Observer
  def after_find(project)
    @original = project.clone
  end

  def after_update(project)
    changed_fields = []
    Project.columns.map(&:name).each do |column|
      unless column == "id" || column == "updated_at"
        unless project.attributes[column] == @original.attributes[column]
          project.logger.debug " *** #{column}: #{project.attributes[column]} vs #{@original.attributes[column]} ***"
          changed_fields.push(column)
        end
      end
    end
    ProjectMailer::deliver_modify(project, changed_fields)
  end
end