问题描述
我想添加一个Auditor Observer,它可以在after_create之后针对3种模型(书籍,人物,作者)随时执行操作...
I'd like to add an Auditor Observer which does an action anytime after_create for 3 models (books, characters, authors)...
我最近听说了Observer功能,但是找不到有关该功能的任何文档. Rails 3支持吗?
I recently heard of the Observer capability but can't find any documentation on the ability. Is it support in Rails 3?
我如何创建对3个模型执行after_create操作的Auditor Observer?
How do I create an Auditor Observer that does something after_create for 3 models?
谢谢
推荐答案
Rails 观察者很不错,您可以在单个观察者
Rails observers are sweet, You can observe
multiple models within a single observer
首先,您需要生成观察者:
First, you need to generate your observer:
rails g observer Auditor
然后,在新的audit_observer.rb文件中,定义要observe
的模型,然后添加after_create
回调.
Then, in your fresh auditor_observer.rb file define the models you wish to observe
and then add the after_create
callback.
class AuditorObserver < ActiveRecord::Observer
observe :model_foo, :model_bar, :model_baz
def after_create(record)
#do something with `record`
end
end
在application.rb中添加
In application.rb add
config.active_record.observers = :auditor_observer
它应该可以工作.
这篇关于Rails 3 Observer-寻找学习如何为多个模型实现Observer的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!