ktkaushik/beta_invite — pull request #2 by ktkaushik (2013-09-27 10:48:43+00:00)
Title: Introducing email validations with uniqueness, format and presence

```ruby
validates :email, presence: true, uniqueness: true, format: { with: /\A[^@]+@([^@\.]+\.)+[^@\.]+\z/ }
```