ActiveRecord missing methods

application_record.rb

class ApplicationRecord < ActiveRecord::Base
  self.abstract_class = true
  
  scope :subquery_as, ->(name) { unscoped.from(arel.as(name)) }
  scope :select_with, ->(*fields) { dup.select_with!(*fields) }
  scope :select_with!, ->(*fields) { self.select_values |= fields.flatten | [table[Arel.star]]; self  }
end

arel_except.rb

module ArelExcept
  refine ActiveRecord::Relation do
    def except(other)= unscoped.from arel.except(other.arel).as(table_name)
  end

  [NilClass, FalseClass].each do |falsey_type|
    refine falsey_type do
      def except(other)= other
    end
  end

  refine Module do
    def except(other)= all.except other
  end
end