module StringifyTime

# File lib/stringify-time.rb, line 2
def stringify_time(*names)
  names.each do |name|
    define_method "#{name}_string" do
      read_attribute(name).to_s(:db) unless read_attribute(name).nil?
    end

    define_method "#{name}_string=" do |time_str|
      begin
        write_attribute("#{name}", Time.zone.parse(time_str))
      rescue ArgumentError
        instance_variable_set("@#{name}_invalid", true)
      end
    end

    define_method "#{name}_invalid?" do
      instance_variable_get("@#{name}_invalid")
    end
  end
end