controller:

def invite_friends

     params[:referraljs].each do |p|
       p.store("user_id" ,  current_user.id)
       p.store("message" ,  object_params[:message])
       referral =  Referral.create(p);

       if referral.valid?
    delete_task('invite_friends')

         user = UserMailer.deliver_advise_fzp!(current_user, p["email"] , object_params[:message] , p["title"] + ' ' + p["firstname"] + ' ' + p["lastname"]);
       flash[:success] = 'Ihr(e) Freund(e) wurde(n) benachrichtigt!'
      end
    end

  redirect_to :back


  end

model:
class Referral < ActiveRecord::Base

  belongs_to :user
  attr_accessor :name
  validates_format_of :email, :with => /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\Z/i , :message    => 'E-Mail-Adresse muss valide sein!'
  validates_presence_of :email
  validates_presence_of :firstname
  validates_presence_of :lastname

end