This post originated from an RSS feed registered with Ruby Buzz by Nathaniel Brown. Original Post: validates_format_of a ZIP or Postal Code in Ruby on Rails Feed Title: Nathaniel Brown Feed URL: http://feeds.feedburner.com/nshb Feed Description: Insight as a professional Technology Consltant and Photographer. Latest Ruby Buzz Posts Latest Ruby Buzz Posts by Nathaniel Brown Latest Posts From Nathaniel Brown

When it comes to building an address model, validation is obviously important to ensure that the data you actually do collect is relatively trustworthy.

I have written up a Regular Expression for those who are interested which accepts both US based ZIP Codes and the Canadian Postal Code.

Here it is...

validates_format_of :zip_postal_code, :with => /((^([a-z]\d[a-z])\s?(\d[a-z]\d)$)|(^([0-9]{5})(-?\d{4})?$))/is