require 'active_support/core_ext/range.rb' module ActiveModel module Validations module Clusivity ERROR_MESSAGE = "An object with the method #include? or a proc or lambda is required, " << "and must be supplied as the :in option of the configuration hash" def check_validity! unless [:include?, :call].any?{ |method| options[:in].respond_to?(method) } raise ArgumentError, ERROR_MESSAGE end end private def include?(record, value) delimiter = options[:in] exclusions = delimiter.respond_to?(:call) ? delimiter.call(record) : delimiter exclusions.send(inclusion_method(exclusions), value) end # In Ruby 1.9 Range#include? on non-numeric ranges checks all possible values in the # range for equality, so it may be slow for large ranges. The new Range#cover? # uses the previous logic of comparing a value with the range endpoints. def inclusion_method(enumerable) enumerable.is_a?(Range) ? :cover? : :include? end end end end