gistfile1.rb

 def create
    build_resource

    card = ActiveMerchant::Billing::CreditCard.new( 
      :number => params[:expiry_number],
      :month => params[:expiry_month],
      :year => params[:date_year],
      :name => params[:name_on_card],
      :verification_value => :params[:cvv]
    )

    if card.valid?
      response = GATEWAY.purchase(5750, card, purchase_options)
      if response.success?
        puts response.inspect
        resource.orders.create!(amount: 57.50, item: "subscription")
        resource.register
      else
        #set_flash_message :notice
        clean_up_passwords(resource)
        respond_with_navigational(resource) { render_with_scope :new }
      end
    end
    if resource.save
      if resource.active_for_authentication?
        set_flash_message :notice, :signed_up if is_navigational_format?
        sign_in(resource_name, resource)
        respond_with resource, :location => after_sign_up_path_for(resource)
      else
        set_flash_message :notice, :inactive_signed_up, :reason => inactive_reason(resource) if is_navigational_format?
        expire_session_data_after_sign_in!
        respond_with resource, :location => after_inactive_sign_up_path_for(resource)
      end

    else
      clean_up_passwords(resource)
      respond_with_navigational(resource) { render_with_scope :new }
    end
  end