👀 Views: 214 💬 Answers: 1 📅 Created: 2025-06-07

ruby inheritance method-resolution modules Ruby

I'm reviewing some code and I'm writing unit tests and I'm having a confusing scenario with method resolution order (MRO) in Ruby when using modules and class inheritance... I have a base class, a subclass, and a module that I'm including in the subclass. I expected the method from the module to override the one in the base class, but it seems like the method from the base class is always being called instead. Here's my code: ```ruby module Greetings def greet 'Hello from the module!' end end class Base def greet 'Hello from the base class!' end end class Subclass < Base include Greetings end sub = Subclass.new puts sub.greet # Expected to print 'Hello from the module!', but it prints 'Hello from the base class!' ``` I tried rearranging the order of the `include` statement and even added `super` to the module method, but neither approach worked. I also checked the `ancestors` method, and it shows the module is included, but the base class method is still being called first. I’m curious if there’s something specific about Ruby’s method lookup that I’m misunderstanding or if I need to use a different technique to ensure the module method takes precedence. Any insights on what I might be missing? I'm coming from a different tech stack and learning Ruby. Could someone point me to the right documentation?