ValidateUrl

This gem adds the capability of validating URLs to ActiveRecord and ActiveModel (Rails 3).

Installation

# add this to your Gemfile
gem "validate_url"

# and  run
sudo gem install validate_url

Usage

With ActiveRecord

class Pony < ActiveRecord::Base
  # standard validation
  validates :homepage, :url => true

  # with allow_nil
  validates :homepage, :url => {:allow_nil => true}

  # with allow_blank
  validates :homepage, :url => {:allow_blank => true}
end

With ActiveModel

class Unicorn
  include ActiveModel::Validations

  attr_accessor :homepage

  # with legacy syntax (the syntax above works also)
  validates_url :homepage, :allow_blank => true
end

I18n

The default error message is not valid url. You can pass the :message => "my custom error" option to your validation to define your own, custom message.

Authors

Tanel Suurhans (http://twitter.com/tanelsuurhans)
Tarmo Lehtpuu (http://twitter.com/tarmolehtpuu)

Contributions

Thanks to Steve Smith for making the validation process even simpler.