Uniqueness email with factory_girl

Use sequence to create valid object with uniqueness constraint.

#Model definition
class User < ActiveRecord::Base
  validates :emal, :uniqueness => true
end

#define factory girl
Factory.sequence :email do |n|
  “user_email#{n}@domain.com”
end

Factory.define :user do |user|
  user.name "dongo"
  user.email { Factory.next(:email) }
end