在Rails中手动设置updated_at [英] Manually set updated_at in Rails

问题描述

我将我的旧博客文章迁移到我的新Rails博客，我想要他们的 updated_at 属性匹配我的旧博客上的对应的值（不是他们的日期被迁移到我的新Rails博客）。

I'm migrating my old blog posts into my new Rails blog, and I want their updated_at attribute to match the corresponding value on my old blog (not the date they were migrated into my new Rails blog).

我该如何做？当我手动设置 updated_at 时，它会被 before_save 回调覆盖。

How can I do this? When I set updated_at manually it gets overridden by the before_save callback.

推荐答案

如果是一次性事情，你可以打开或关闭 record_timestamps 。

If it's a one time thing you can turn record_timestamps on or off.

ActiveRecord::Base.record_timestamps = false

#set timestamps manually

ActiveRecord::Base.record_timestamps = true

当我遇到这个问题与我的应用程序，我搜索了一下，它对我最有意义。这是一个初始化程序，我可以调用，我需要：

When I ran into this issue with my app, I searched around for a bit and this seemed like it made the most sense to me. It's an initializer that I can call where I need to:

module ActiveRecord  
  class Base  

    def update_record_without_timestamping  
      class << self  
        def record_timestamps; false; end  
      end  

      save!  

      class << self  
        def record_timestamps; super ; end  
      end  
    end  

  end  
end  

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