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我正在使用activemerchant并且在验证卡在rails 3中是否正常时它会引发我的错误？先谢谢你们所有人的力量

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

它指向 Undefined method add_to_base

我试过rake db:reset,现在我可以;访问它admin@example.com |密码,它在我登录时返回一个无效的用户/密码.我检查了我的数据库它在那里为什么会这样？

id          email              encrypted_password                                            reset_password_token  reset_password_sent_at  remember_created_at         sign_in_count  current_sign_in_at          last_sign_in_at             current_sign_in_ip  last_sign_in_ip  created_at                  updated_at                
----------  -----------------  ------------------------------------------------------------  --------------------  ----------------------  --------------------------  -------------  --------------------------  --------------------------  ------------------  ---------------  --------------------------  --------------------------
1           admin@example.com  $2a$10$cCUYBOKQHAZhpYgdLIZIWuQArkrsjpgIMu9/kk17127Oj.DKYwVxa                                                2012-04-19 15:23:02.857402  36             2012-04-25 02:37:36.689711  2012-04-25 02:31:55.088037  127.0.0.1           127.0.0.1        2012-03-09 16:23:58.779104  2012-04-25 02:37:36.692613
sqlite>