require 'active_record' ActiveRecord::Base.establish_connection adapter: "sqlite3", database: ":memory:" ActiveRecord::Migration.create_table :users do |t| t.string :email t.string :name t.timestamps end class User < ActiveRecord::Base # Without form validations. # Only Domain Validations end class BaseAuthForm < FormObject::Base map_model User attribute :email, String validates :email, :presence => true end class TwitterAuthForm < FormObject::Base map_model User, :as => :twitter end