如何查看 Ruby 中类层次结构中方法的定义和重写位置？
有没有办法以编程方式知道某个方法是否已被子类覆盖？像这样工作的东西：
class BaseModel
def create
puts "superclass"
end
end
class SomeModel < BaseModel
def create
puts "subclass"
end
end
puts SomeModel.overridden_instance_methods #=> [:create]
有什么想法吗？
Is there a way to know whether or not a method has been overridden by a subclass programmatically? Something that works like this:
class BaseModel
def create
puts "superclass"
end
end
class SomeModel < BaseModel
def create
puts "subclass"
end
end
puts SomeModel.overridden_instance_methods #=> [:create]
Any ideas?
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false使instance_methods不包含继承的方法。然后，我们使用集合交集来查找先前在 BaseModel（或 Object）上定义的 SomeModel 上定义的所有方法。The
falsemakesinstance_methodsnot include inherited methods. We then use set intersection to find all the methods that were defined on SomeModel which have previously been defined on BaseModel (or Object).