Ruby include module's single method in model

Question

I have a module of following

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

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

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

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

Answer 1

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

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

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.