Multi tool use

extend a module with submodule methods and constants

I want to be able to extend a module with the methods and constants of a submodule.

If I use extend I receive undefined constant.

extend

The only way I made it work is using both extend and include. I tried also using self.method on submodule.

extend

include

module Car
module Container
HOLA = 'Helloo!'
def testing
HOLA
end
end
include Container
extend Container
end


So this both should work:

Car.testing # Hello!
Car::HOLA # Hello!


I guess this is a code smell..., but what other ways to make it work you know?

include

Car.testing

'Helloo!'

Car.testing

Car::HOLA

1 Answer
1

As per the description shared, it seems like you want to access the nested module constants and methods in some_other_class.

This is the module definition as mentioned in the post.

module Car
module Container
HOLA = 'Helloo!'
def testing
HOLA
end
end
end


Now Suppose , that you want to use this method in some class say Vehicle

require 'car' #this is the module file since it is residing in some other file

class Vehicle
extend Car

def test
Car.testing
end
end


Now calling Vehicle.new.test will print

"Helloo!"


Hope it helps!!

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