轨道模型的审计功能

Question

我试图为我的一些rails模型实现审计功能并将其存储在外部“事件”数据库（我们选择BigQuery）。

每个事件应该是很基本的： before_json，after_json，DIFF，动作，OBJECT_ID

于是，我开始建设这个问题，我就加入到我的车型规划：

module Auditable 
    extend ActiveSupport::Concern 

    included do 

    before_destroy {audit(:destroy)} 

    after_validation on: :update do 
     audit(:update) 
    end 

    after_validation on: :create do 
     audit(:create) 
    end 

    def audit(action) 
     EventSender.send(before_json, self.to_json, diff, action, self.id) 
    end 
    end 
end 

的只有我不知道如何实现的是获取对象的之前的状态，所以我可以填充相关的字段和两个状态之间的差异。

关于如何做到这一点的任何想法？

Answer 1

我解决它通过以下方式：

module Auditable 
    require 'active_record/diff' 

    extend ActiveSupport::Concern 

    included do 
    include ActiveRecord::Diff 

    before_destroy {audit(:destroy, before: before_state)} 

    after_validation on: :update do 
     audit(:update, before: before_state, after: self) 
    end 

    after_create do 
     audit(:create, after: self) 
    end 

    def audit(action, before: {}, after: {}) 
     diff = case action 
      when :update 
       before.diff(after) 
      when :create 
       after 
      when :destroy 
       before 
      end 

     BigQueryClient.new.insert(
     self.class.to_s.downcase, 
     { 
      before: before.to_json, 
      after: after.to_json, 
      diff: diff.to_json, 
      action: action, 
      "#{self.class.to_s.downcase.to_sym}_id": self.id 
     }, 
     dataset_name: "audit" 
    ) 
    end 

    private 

    def before_state 
     self.class.find(self.id) 
    end 
    end 
end 

请注意，我使用的是所谓的“ActiveRecord的-DIFF”的外部宝石来计算前后之间的差异。