string_to_date

# File activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb, line 102
      def self.string_to_date(string)
        return string unless string.is_a?(String)
        date_array = ParseDate.parsedate(string)
        # treat 0000-00-00 as nil
        Date.new(date_array[0], date_array[1], date_array[2]) rescue nil
      end