您可以在 Rails 模块中包含 before/after 过滤器吗? [英] Can you include before/after filters in a Rails Module?

问题描述

我想为两个模型添加一个方法，所以我制作了一个这样的模块并将其包含在两个模型中.

I wanted to add a method to two models, so I made a module like this and included it in both models.

module UserReputation
  def check_something
    ...
  end
end

效果很好.然后我想在所有这些模型上将该方法称为 :after_create .如果我手动将它添加到所有模型中，它会起作用，但我想变得聪明并将它包含在这样的模块中:

That worked fine. I then wanted to have that method called as an :after_create on all those models. It works if I add it manually to all the models, but I wanted to be smart and include it in the module like this:

module UserReputation
  after_create :check_something
  def check_something
    ...
  end
end

但这行不通.有什么方法可以完成此操作并同时完成 after_create 吗?

But this doesn't work. Is there any way to accomplish this and DRY up the after_create as well?

推荐答案

尝试 self.included，在模块混入类base时调用:

Try self.included, which is called when the module is mixed into the class base:

module UserReputation
  def self.included(base)
    base.after_create :check_something
  end
end

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