ruby on rails if email exist return success
===

controller function

    def request_invite
            
            if !request.xhr?
                    render_404
                    return
            end

            @invitation = Invite.new(params[:invite])

            if @invitation.save
            	@return = { :error => false, :response => "Thank you" }
            else
                    error_message = '<div class="error_message">' + @invitation.errors.full_messages.map {|error| "<p>#{error}</p>"}.join + "</div>"
            	@return = { :error => true, :response => error_message } 
            end

            render :json => ActiveSupport::JSON.encode( @return )

    end

model

    class Invite < ActiveRecord::Base
    
    	validates :email, :presence => true, :uniqueness => true
    
    	validates_format_of :email, :with => /^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i
    
    end

this will either save to the db and show a success msg or throw an error if exist...

i want to show the success msg even if the email already exist in the database so it wont show that the email has already been added
