ruby - 在类中包含模块并执行代码

Question

这是我以前上过的一堂课

class Something
    # Defines the validates class methods, which is called upon instantiation
    include Module

    validates :name
    validates :date

end

我现在有几个使用相同功能的对象，更糟糕的是，有几个对象定义了类似的东西，如下所示：

class Anotherthing
    # Defines the validates class methods,  which is called upon instantiation
    include Module

    validates :age

end

我想“重用”这些类的内容，所以我把它们变成了模块：

module Something
    # Defines the validates class methods  which is called upon instantiation
    include Module

    validates :name
    validates :date

end

module Anotherthing
    # Defines the validates class methods which is called upon instantiation
    include Module

    validates :age

end

我现在可以创建一个类

class ADualClass
   include Something
   include Anotherthing
end

我遇到的问题是，当我创建 ADualClass 对象时未调用 validates 方法......似乎从未调用过“validates：thing”。这是为什么？我怎么能强迫这个？

Answer 1

在您的模块中，您需要定义，例如

def self.included(base)
  base.validates :name
  base.validates :date
end