This post originated from an RSS feed registered with Ruby Buzz by rwdaigle. Original Post: What's New in Edge Rails: Validations Now :allow_blank Feed Title: Ryan's Scraps Feed URL: http://feeds.feedburner.com/RyansScraps Feed Description: Ryan Daigle's various technically inclined rants along w/ the "What's new in Edge Rails" series. Latest Ruby Buzz Posts Latest Ruby Buzz Posts by rwdaigle Latest Posts From Ryan's Scraps

This is a tiny update, but one worth mentioning. The various activerecord validation methods now accept an :allow_blank option that will let validation pass if the value is nil or an empty string.

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class Post < ActiveRecord::Base
  validates_length_of :meta, :maximum => 3, :allow_blank => true
end

p = Post.new(:meta => "")
p.valid?  #=> true

Hardly earth-shattering, but convenient and a nice compliment to :allow_nil.

tags: ruby, rubyonrails