如何避免运行 ActiveRecord 回调? [英] How can I avoid running ActiveRecord callbacks?

问题描述

我有一些具有 after_save 回调的模型.通常这很好，但在某些情况下，例如在创建开发数据时，我想在不运行回调的情况下保存模型.有没有一种简单的方法可以做到这一点?类似于...

I have some models that have after_save callbacks. Usually that's fine, but in some situations, like when creating development data, I want to save the models without having the callbacks run. Is there a simple way to do that? Something akin to...

Person#save( :run_callbacks => false )

或

Person#save_without_callbacks

我查看了 Rails 文档并没有找到任何内容.然而，根据我的经验，Rails 文档并不总是能说明全部情况.

I looked in the Rails docs and didn't find anything. However in my experience the Rails docs don't always tell the whole story.

更新

我发现 一篇博文，解释了如何从这样的模型中删除回调:

I found a blog post that explains how you can remove callbacks from a model like this:

Foo.after_save.clear

我找不到记录该方法的位置，但它似乎有效.

I couldn't find where that method is documented but it seems to work.

推荐答案

此解决方案仅适用于 Rails 2.

This solution is Rails 2 only.

我刚刚调查了这个问题，我想我有一个解决方案.您可以使用两种 ActiveRecord 私有方法:

I just investigated this and I think I have a solution. There are two ActiveRecord private methods that you can use:

update_without_callbacks
create_without_callbacks

您将不得不使用 send 来调用这些方法.示例:

You're going to have to use send to call these methods. examples:

p = Person.new(:name => 'foo')
p.send(:create_without_callbacks)

p = Person.find(1)
p.send(:update_without_callbacks)

这绝对是您真正想在控制台中或在进行一些随机测试时使用的东西.希望这会有所帮助！

This is definitely something that you'll only really want to use in the console or while doing some random tests. Hope this helps!

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