association_collection_extension.rb

# frozen_string_literal: true
module Refinements
  module AssociationCollectionExtension
    refine ActiveRecord::Associations::CollectionProxy do
      def find_or_build_by(arguments)
        find_by(arguments) || build(arguments)
      end

      def detect_or_build_by(arguments)
        self.detect do|instance|
          arguments.all? do |key, value|
            instance.send(key) == value
          end
        end || build(arguments)
      end
    end
  end
end