Auditable Module

auditable.rb

module Auditable
  
  extend ActiveSupport::Concern

  # Array de exclusion de auditoŕia

  BLACK_LIST = ["created_at", "updated_at", "metadata"]

  included do
    before_update :audit_record_update
    after_create :audit_record_create
    before_destroy :audit_record_destroy
  end

  private

  def audit_record_update
    recurso = self.class.name.underscore

    self.changes.each do |key,value|
      unless BLACK_LIST.include?(key)
        Audit.create( user_id: Thread.current[:current_user], recurso: recurso, pk_registro: self.id, 
                      columna: key, accion: "update", anterior: value.first 
                    ) unless Thread.current[:current_user].nil?
      end
    end
  end

  def audit_record_create
    recurso = self.class.name.underscore

    Audit.create( user_id: Thread.current[:current_user], recurso: recurso, pk_registro: self.id,
                  columna: "", accion: "create", anterior: "") unless recurso == "audit"
  end

  def audit_record_destroy
    recurso = self.class.name.underscore

    self.attributes.each do |attribute|
      unless BLACK_LIST.include?(attribute)
        Audit.create( user_id: Thread.current[:current_user], recurso: recurso, pk_registro: self.id,
                      columna: attribute.first, accion: "destroy", anterior: attribute.last ) unless recurso == "audit"    
      end
    end
  end
end

ActiveRecord::Base.send(:include, Auditable)