Ruby包含模块中模块的单一方法 [英] Ruby include module's single method in model

问题描述

我有以下模块

module SimpleTask
    def task1
    end
    def task2
    end
    def task3
    end
end

我有一个模型只需要 task2 模块的方法 SimpleTask 。

And I have a model which requires only task2 method of module SimpleTask.

我知道在我的模型中包含 SimpleTask ，其中包含 include SimpleTask 可以完成这项工作。

I know including SimpleTask in my model with include SimpleTask would do the job.

但我想知道我的模型中是否只能包含特定的 task2 方法。

But I wonder if I can only include specific task2 method in my model.

推荐答案

听起来你需要将＃task2 重构成一个单独的模块（例如， BaseTask ）。然后你可以轻松地只包含 BaseTask ，你只需要＃task2 。

It sounds like you need to refactor #task2 into a separate module (e.g., BaseTask). Then you can easily include only BaseTask where you only need #task2.

module BaseTask
  def task2
    ...
  end
end

module SimpleTask
  include BaseTask

  def task1
    ...
  end

  def task3
    ...
  end
end

如果没有更具体的问题（比如两者之间的相互依赖），很难提供更多帮助 SimpleTask 等的方法

It's hard to help much more without a more concrete question (such as interdependence between the methods of SimpleTask, etc.

你可以做一些元编程包括SimpleTask 然后取消定义你不想要的方法，但这是非常难看的IMO。

You could do some meta-programming where you include SimpleTask and then undefine the methods you don't want, but that's pretty ugly IMO.

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