Assocation Decoration in Rails

associations.rb

module MyApp
  module Assocations

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

    module ClassMethods
      def decorate_association(**options, &block)
         yield AssocationDecorator.new(self, options)
      end
    end

    class AssocationDecorator
      attr_accessor :options, :klass
      def initialize(klass, **options)
        @klass = klass
        @options = options
      end
      def has_many(name, scope = nil, **options, &extension)
        @klass.has_many(name, scope, options.reverse_merge(@options), &extension)
      end
    end
  end
end