Undefined method add_to_base

Question

I'm working with activemerchant and it raise me this error when validating the card is this ok in rails 3? thank you in advance more power to all

belongs_to :reservation

  attr_accessor :card_number, :card_verification

  validate :validate_card, :on => :create

  def validate_card
    unless credit_card.valid?
      credit_card.errors.full_messages.each do |message|
        errors.add_to_base "error"
      end
    end
  end

    def credit_card
    @credit_card ||= ActiveMerchant::Billing::CreditCard.new(
      :type               => card_type,
      :number             => card_number,
      :verification_value => card_verification,
      :month              => card_expires_on.month,
      :year               => card_expires_on.year,
      :first_name         => first_name,
      :last_name          => last_name
    )
  end

it is pointing to Undefined method add_to_base

Answer 1

add_to_base method was removed from rails 3. You should use errors[:base] << "error" instead.

Answer 2

I prefer the following, over the accepted answer:

errors.add :base, 'error message'

Answer 3

In your model just make:

:add_to_base=> false

Access it in your controller as:

model_instance.errors.messages