Ruby on rails 订阅模型中Ruby中的堆栈级别太深

我是RoR的noob，我希望有人能帮我指出正确的方向？错误日志显示“堆栈级别太深”

我已经安装了koudoku宝石

我有一个商户模式和一个订阅模式。我所做的只是在订阅模型中添加了两行代码

class Subscription < ActiveRecord::Base
include Koudoku::Subscription

belongs_to :merchant
belongs_to :coupon

def processing!

  # if their package level has changed ..
  if changing_plans?

    prepare_for_plan_change

    # and a customer exists in stripe ..
    if stripe_id.present?

      # fetch the customer.
      customer = Stripe::Customer.retrieve(self.stripe_id)

      # if a new plan has been selected
      if self.plan.present?

        # Record the new plan pricing.
        self.current_price = self.plan.price
         merchant.role = Merchant.roles[plan.stripe_id]
         merchant.save

        prepare_for_downgrade if downgrading?
        prepare_for_upgrade if upgrading?

        # update the package level with stripe.
        customer.update_subscription(:plan => self.plan.stripe_id, :prorate => Koudoku.prorate)

        finalize_downgrade! if downgrading?
        finalize_upgrade! if upgrading?

      # if no plan has been selected.
      else

        prepare_for_cancelation

        # Remove the current pricing.
        self.current_price = nil

        # delete the subscription.
        customer.cancel_subscription

        finalize_cancelation!

      end

    # when customer DOES NOT exist in stripe ..
    else

      # if a new plan has been selected
      if self.plan.present?

        # Record the new plan pricing.
        self.current_price = self.plan.price
        merchant.role = Merchant.roles[plan.stripe_id]
        merchant.save

        prepare_for_new_subscription
        prepare_for_upgrade

        begin
          raise Koudoku::NilCardToken, "Possible javascript error" if credit_card_token.empty?
          customer_attributes = {
            description: subscription_owner_description,
            email: subscription_owner_email,
            card: credit_card_token, # obtained with Stripe.js
          }


          # If the class we're being included in supports coupons ..
          if respond_to? :coupon
            if coupon.present? and coupon.free_trial?
              customer_attributes[:trial_end] = coupon.free_trial_ends.to_i
            end
          end

          customer_attributes[:coupon] = @coupon_code if @coupon_code

          # create a customer at that package level.
          customer = Stripe::Customer.create(customer_attributes)

          finalize_new_customer!(customer.id, plan.price)
          customer.update_subscription(:plan => self.plan.stripe_id, :prorate => Koudoku.prorate)

        rescue Stripe::CardError => card_error
          errors[:base] << card_error.message
          card_was_declined
          return false
        end

        # store the customer id.
        self.stripe_id = customer.id
        self.last_four = customer.cards.retrieve(customer.default_card).last4

        finalize_new_subscription!
        finalize_upgrade!

      else

        # This should never happen.

        self.plan_id = nil

        # Remove any plan pricing.
        self.current_price = nil

      end


    finalize_plan_change!
    end

  # if they're updating their credit card details.
  elsif self.credit_card_token.present?

    prepare_for_card_update

    # fetch the customer.
    customer = Stripe::Customer.retrieve(self.stripe_id)
    customer.card = self.credit_card_token
    customer.save

    # update the last four based on this new card.
    self.last_four = customer.cards.retrieve(customer.default_card).last4
    finalize_card_update!

  end
end
end


 def describe_difference(plan_to_describe)
if plan.nil?
  if persisted?
    I18n.t('koudoku.plan_difference.upgrade')
  else
    if Koudoku.free_trial?
      I18n.t('koudoku.plan_difference.start_trial')
    else
      I18n.t('koudoku.plan_difference.upgrade')
    end
  end
else
  if plan_to_describe.is_upgrade_from?(plan)
    I18n.t('koudoku.plan_difference.upgrade')
  else
    I18n.t('koudoku.plan_difference.downgrade')
  end
end

end

after_commit :set_merchant_role

def set_merchant_role
  merchant.role = Merchant.roles[plan.stripe_id]
  merchant.save
end

当计划升级或降级时，它可以正常工作，但当用户注册新计划时，它就不能正常工作。我如何解决这个问题

我在这里添加了两行

      # and a customer exists in stripe ..
      if stripe_id.present?

      # fetch the customer.
      customer = Stripe::Customer.retrieve(self.stripe_id)

      # if a new plan has been selected
      if self.plan.present?

        # Record the new plan pricing.
        self.current_price = self.plan.price
         merchant.role = Merchant.roles[plan.stripe_id]
         merchant.save

在这里

# when customer DOES NOT exist in stripe ..
else

  # if a new plan has been selected
  if self.plan.present?

    # Record the new plan pricing.
    self.current_price = self.plan.price
    merchant.role = Merchant.roles[plan.stripe_id]
    merchant.save

下面是订阅模型的全部代码

class Subscription < ActiveRecord::Base
include Koudoku::Subscription

belongs_to :merchant
belongs_to :coupon

def processing!

  # if their package level has changed ..
  if changing_plans?

    prepare_for_plan_change

    # and a customer exists in stripe ..
    if stripe_id.present?

      # fetch the customer.
      customer = Stripe::Customer.retrieve(self.stripe_id)

      # if a new plan has been selected
      if self.plan.present?

        # Record the new plan pricing.
        self.current_price = self.plan.price
         merchant.role = Merchant.roles[plan.stripe_id]
         merchant.save

        prepare_for_downgrade if downgrading?
        prepare_for_upgrade if upgrading?

        # update the package level with stripe.
        customer.update_subscription(:plan => self.plan.stripe_id, :prorate => Koudoku.prorate)

        finalize_downgrade! if downgrading?
        finalize_upgrade! if upgrading?

      # if no plan has been selected.
      else

        prepare_for_cancelation

        # Remove the current pricing.
        self.current_price = nil

        # delete the subscription.
        customer.cancel_subscription

        finalize_cancelation!

      end

    # when customer DOES NOT exist in stripe ..
    else

      # if a new plan has been selected
      if self.plan.present?

        # Record the new plan pricing.
        self.current_price = self.plan.price
        merchant.role = Merchant.roles[plan.stripe_id]
        merchant.save

        prepare_for_new_subscription
        prepare_for_upgrade

        begin
          raise Koudoku::NilCardToken, "Possible javascript error" if credit_card_token.empty?
          customer_attributes = {
            description: subscription_owner_description,
            email: subscription_owner_email,
            card: credit_card_token, # obtained with Stripe.js
          }


          # If the class we're being included in supports coupons ..
          if respond_to? :coupon
            if coupon.present? and coupon.free_trial?
              customer_attributes[:trial_end] = coupon.free_trial_ends.to_i
            end
          end

          customer_attributes[:coupon] = @coupon_code if @coupon_code

          # create a customer at that package level.
          customer = Stripe::Customer.create(customer_attributes)

          finalize_new_customer!(customer.id, plan.price)
          customer.update_subscription(:plan => self.plan.stripe_id, :prorate => Koudoku.prorate)

        rescue Stripe::CardError => card_error
          errors[:base] << card_error.message
          card_was_declined
          return false
        end

        # store the customer id.
        self.stripe_id = customer.id
        self.last_four = customer.cards.retrieve(customer.default_card).last4

        finalize_new_subscription!
        finalize_upgrade!

      else

        # This should never happen.

        self.plan_id = nil

        # Remove any plan pricing.
        self.current_price = nil

      end


    finalize_plan_change!
    end

  # if they're updating their credit card details.
  elsif self.credit_card_token.present?

    prepare_for_card_update

    # fetch the customer.
    customer = Stripe::Customer.retrieve(self.stripe_id)
    customer.card = self.credit_card_token
    customer.save

    # update the last four based on this new card.
    self.last_four = customer.cards.retrieve(customer.default_card).last4
    finalize_card_update!

  end
end
end


 def describe_difference(plan_to_describe)
if plan.nil?
  if persisted?
    I18n.t('koudoku.plan_difference.upgrade')
  else
    if Koudoku.free_trial?
      I18n.t('koudoku.plan_difference.start_trial')
    else
      I18n.t('koudoku.plan_difference.upgrade')
    end
  end
else
  if plan_to_describe.is_upgrade_from?(plan)
    I18n.t('koudoku.plan_difference.upgrade')
  else
    I18n.t('koudoku.plan_difference.downgrade')
  end
end

end

after_commit :set_merchant_role

def set_merchant_role
  merchant.role = Merchant.roles[plan.stripe_id]
  merchant.save
end

---

并重复。

我只需添加一个after_commit回调来设置角色，就解决了这个问题

以下是订阅模型中的更新代码

class Subscription < ActiveRecord::Base
include Koudoku::Subscription

belongs_to :merchant
belongs_to :coupon

def processing!

  # if their package level has changed ..
  if changing_plans?

    prepare_for_plan_change

    # and a customer exists in stripe ..
    if stripe_id.present?

      # fetch the customer.
      customer = Stripe::Customer.retrieve(self.stripe_id)

      # if a new plan has been selected
      if self.plan.present?

        # Record the new plan pricing.
        self.current_price = self.plan.price
         merchant.role = Merchant.roles[plan.stripe_id]
         merchant.save

        prepare_for_downgrade if downgrading?
        prepare_for_upgrade if upgrading?

        # update the package level with stripe.
        customer.update_subscription(:plan => self.plan.stripe_id, :prorate => Koudoku.prorate)

        finalize_downgrade! if downgrading?
        finalize_upgrade! if upgrading?

      # if no plan has been selected.
      else

        prepare_for_cancelation

        # Remove the current pricing.
        self.current_price = nil

        # delete the subscription.
        customer.cancel_subscription

        finalize_cancelation!

      end

    # when customer DOES NOT exist in stripe ..
    else

      # if a new plan has been selected
      if self.plan.present?

        # Record the new plan pricing.
        self.current_price = self.plan.price
        merchant.role = Merchant.roles[plan.stripe_id]
        merchant.save

        prepare_for_new_subscription
        prepare_for_upgrade

        begin
          raise Koudoku::NilCardToken, "Possible javascript error" if credit_card_token.empty?
          customer_attributes = {
            description: subscription_owner_description,
            email: subscription_owner_email,
            card: credit_card_token, # obtained with Stripe.js
          }


          # If the class we're being included in supports coupons ..
          if respond_to? :coupon
            if coupon.present? and coupon.free_trial?
              customer_attributes[:trial_end] = coupon.free_trial_ends.to_i
            end
          end

          customer_attributes[:coupon] = @coupon_code if @coupon_code

          # create a customer at that package level.
          customer = Stripe::Customer.create(customer_attributes)

          finalize_new_customer!(customer.id, plan.price)
          customer.update_subscription(:plan => self.plan.stripe_id, :prorate => Koudoku.prorate)

        rescue Stripe::CardError => card_error
          errors[:base] << card_error.message
          card_was_declined
          return false
        end

        # store the customer id.
        self.stripe_id = customer.id
        self.last_four = customer.cards.retrieve(customer.default_card).last4

        finalize_new_subscription!
        finalize_upgrade!

      else

        # This should never happen.

        self.plan_id = nil

        # Remove any plan pricing.
        self.current_price = nil

      end


    finalize_plan_change!
    end

  # if they're updating their credit card details.
  elsif self.credit_card_token.present?

    prepare_for_card_update

    # fetch the customer.
    customer = Stripe::Customer.retrieve(self.stripe_id)
    customer.card = self.credit_card_token
    customer.save

    # update the last four based on this new card.
    self.last_four = customer.cards.retrieve(customer.default_card).last4
    finalize_card_update!

  end
end
end


 def describe_difference(plan_to_describe)
if plan.nil?
  if persisted?
    I18n.t('koudoku.plan_difference.upgrade')
  else
    if Koudoku.free_trial?
      I18n.t('koudoku.plan_difference.start_trial')
    else
      I18n.t('koudoku.plan_difference.upgrade')
    end
  end
else
  if plan_to_describe.is_upgrade_from?(plan)
    I18n.t('koudoku.plan_difference.upgrade')
  else
    I18n.t('koudoku.plan_difference.downgrade')
  end
end

end

after_commit :set_merchant_role

def set_merchant_role
  merchant.role = Merchant.roles[plan.stripe_id]
  merchant.save
end

---

嗨，欢迎来到SO！你安装Koudoku后，这个嗨！是的，我做了。我只是想在选择计划时向订阅模型添加一个enum角色。它在我升级或降级计划时起作用，但当用户订阅新计划时会出现错误。因此，在#when customer不存在于条带中时。。lineYup，我在#条带中不存在客户时#下方添加了2个代码。。。