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self_included_hook

⚙️ Using included Hook to Extend Class Methods​

Modules can automatically add both instance and class methods to classes on inclusion by defining self.included. This lets you group related behaviors in one place.

module Auditable
  def self.included(base)
    base.extend(ClassMethods)
  end

  module ClassMethods
    def audit_logs
      @logs ||= []
    end
  end

  def log_change(msg)
    self.class.audit_logs << msg
  end
end

class User
  include Auditable
end

User.new.log_change("created")
p User.audit_logs # => ["created"]