Sample Credit Card Validation with ActiveMerchant

gistfile1.rb

# encoding: utf-8
#
class Account::CreditCardController < Account::BaseController
  # GET /account/credit_card
  def edit
    @account = current_account
    @credit_card = ActiveMerchant::Billing::CreditCard.new
  end

  # PUT /account/credit_card
  def update
    @account = current_account
    @credit_card = ActiveMerchant::Billing::CreditCard.new(params['credit_card'])
    if @credit_card.valid? && @account.subscription.update_credit_card(@credit_card)
      flash[:admin_success] = "admin.account.credit_card.update.success"
      redirect_to account_url
    else
      render :edit
    end
  end
end