ruby-on-rails – Stripe Ruby – 按ID查找现有客户并添加计划

Once you’ve created a customer,you should store its id in your own database so you can refer to it later when communicating with stripe.

好的,够容易的.我的问题是：如何通过他们的ID找到客户？
更新如下：

customer = Stripe::Customer.retrieve(id)

当我为我的某项服务注册新客户时,我创建了一个新的Stripe客户,但如果他们是现有客户,我想使用他们现有的帐户,只需添加一个计划.我如何找到它们并添加新计划？我查看了文档和ruby的宝石,但无法弄明白.请帮忙？这是有问题的方法.

def social_signup
    token = params[:stripe_token]
    if current_vendor.stripe_id == nil
        customer = Stripe::Customer.create(
            :card => token,:plan => 'social',:email => current_vendor.email
        )

        current_vendor.update_attributes(stripe_id: customer.id)
    else
        customer = Stripe::Customer.retrieve(current_vendor.stripe_id)
        # bill the customer's existing account for the added subscription
    end

    redirect_to :somewhere
end