Custom Validators

An ever growing collection of custom validators for ActiveModel 3.0.

Preface

Rails 3.0 have a nice new way to validate instance attributes against built-in and custom validators. For example, you could say:

class Foo << ActiveRecord::Base
  validates :name, :presence => true, :uniqueness => true, :format => /(.*)/
end

This equals the following:

class Foo << ActiveRecord::Base
  validates_presence_of :name
  validates_uniqueness_of :name
  validates_format_of :name, :with => /(.*)/
end

You can do this now without using ActiveRecord either, using only ActiveModel’s validators to validata your model’s attributes:

class Foo
  include ActiveModel::Validators

  attr_accessor :name
  validates :name, :presence => true, :uniqueness => true
end

For more information on validators in Rails 3.0, please visit this excellent post by Jamie Hill: thelucid.com/2010/01/08/sexy-validation-in-edge-rails-rails-3/

Install as a gem:

# gem install custom_validators

Or as a plugin

# rails plugin install http://github.com/tarsolya/custom-validators.git

Supported validators:

email - Simple validator for e-mail address format, not RFC compliant, though.

# validates :contact, :email => true
real_id - Validates attribute against the new Real ID format used on Blizzard’s Battle.net 2.0

# validates :bnet_id, :real_id = true

* ActiveModel 3.0

Fork.
Include your custom validator and name it properly.
Please do add specs for it. It should be pretty simple, just check out the already included ones.
Commit your changes, but leave Rakefile, VERSION or HISTORY alone.
Send me a pull request. Bonus points for topic branches.