How in Ruby can I get the module in which a module instance method is defined?-CodePudding

Assuming I have:

module X::Y::Z::M
  def foo
  end
end

How in foo can I dynamically determine the module X::Y::Z::M in the foo method? self.class will not work because it will evaluate to the class that includes the module.

CodePudding user response：

You can use Module.nesting method which returns an array of nesting modules, Refer nesting method of Moudle

module X::Y::Z::M
  def foo
    Module.nesting.first
  end
end

CodePudding user response：

I am assuming you mean given an instance of a class that includes the module, how to determine where that method is defined

Suppose you have,

module X::Y::Z::M
  def foo
  end
end

and another class

class Test
  include X::Y::Z::M
end

If you want to know where a method is declared you can do

Test.new.method(:foo).owner #returns X::Y::Z::M

You can also determine this from within foo, in case you cannot hardcode it

module X::Y::Z::M
 def foo
   method(:foo).owner #this will evaluate to X::Y::Z::M
 end
end