👀 Views: 47 💬 Answers: 1 📅 Created: 2025-06-07

ruby-on-rails ooad concerns Ruby

I'm working with a puzzling scenario with method resolution in Ruby on Rails while using concerns for shared behavior. I have a `User` model that includes a concern called `Trackable`. In this concern, I've defined a method called `track_activity`. However, when I call `track_activity` on an instance of `User`, I get the following behavior: `NoMethodError: undefined method 'track_activity' for #<User:...>`. It seems like the method isn't being recognized, even though I've included the concern properly. Here’s the code for the concern: ```ruby # app/models/concerns/trackable.rb module Trackable extend ActiveSupport::Concern included do before_save :track_activity end def track_activity # tracking logic here end end ``` And in my `User` model, I include the concern like this: ```ruby # app/models/user.rb class User < ApplicationRecord include Trackable end ``` I've checked that the concern file is loaded correctly and that the `User` model does inherit from `ApplicationRecord`. I also confirmed that there are no typos in the method name. Despite that, when I try to create a new user with something like this: ```ruby user = User.new(name: 'John Doe') user.save ``` I still get the same behavior. I suspect it might have something to do with the method resolution order or the way Rails loads concerns, but I'm not sure what to look for. Any ideas on what might be going wrong here or how to troubleshoot this scenario further?