Rubyのスタックレベルがサブスクリプションモデルであまりにも深い

Question

私はRoRのノブです。誰かが私にこれを正しい方向に向けるのを手伝ってくれることを願っていますか？エラーログに「stack level too deep」と表示されます。

私はkoudoku gemをインストールしました。

私はマーチャントモデルとサブスクリプションモデルを持っています。私がしたことは、サブスクリプションモデルに2行のコードを追加することでした。

プランがアップグレードまたはダウングレードされたときにはうまく動作しますが、ユーザーが新しいプランにサインアップするときにはうまく動作しません。これをどうすれば解決できますか？

ここに2行追加しました。

 # 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 

ここにあります。

# 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 

サブスクリプションモデル全体のコードは次のとおりです。

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 

ここにマーチャントモデルがあります。

class Merchant < ActiveRecord::Base 
# Added by Koudoku. 
has_one :subscription 

# Include default devise modules. Others available are: 
# :confirmable, :lockable, :timeoutable and :omniauthable 
devise :database_authenticatable, :registerable, 
    :recoverable, :rememberable, :trackable, :validatable 

enum role: [:free, :basic, :basic_plus, :pair, :bundle, :admin] 


end 

これは私のエラーログです。

activerecord (4.2.5) lib/active_record/attribute.rb:29:in `initialize' 
activerecord (4.2.5) lib/active_record/attribute.rb:9:in `new' 
activerecord (4.2.5) lib/active_record/attribute.rb:9:in `from_user' 
activerecord (4.2.5) lib/active_record/attribute.rb:58:in `with_value_from_user' 
activerecord (4.2.5) lib/active_record/attribute_set.rb:39:in `write_from_user' 
activerecord (4.2.5) lib/active_record/attribute_methods/write.rb:74:in `write_attribute_with_type_cast' 
activerecord (4.2.5) lib/active_record/attribute_methods/write.rb:56:in `write_attribute' 
activerecord (4.2.5) lib/active_record/attribute_methods/dirty.rb:96:in `write_attribute' 
activerecord (4.2.5) lib/active_record/attribute_methods.rb:373:in `[]=' 
devise (4.2.1) lib/devise/models/authenticatable.rb:207:in `apply_to_attribute_or_variable' 
devise (4.2.1) lib/devise/models/authenticatable.rb:198:in `block in downcase_keys' 
devise (4.2.1) lib/devise/models/authenticatable.rb:198:in `each' 
devise (4.2.1) lib/devise/models/authenticatable.rb:198:in `downcase_keys' 
activesupport (4.2.5) lib/active_support/callbacks.rb:432:in `block in make_lambda' 
activesupport (4.2.5) lib/active_support/callbacks.rb:164:in `block in halting' 
activesupport (4.2.5) lib/active_support/callbacks.rb:504:in `block in call' 
activesupport (4.2.5) lib/active_support/callbacks.rb:504:in `each' 
activesupport (4.2.5) lib/active_support/callbacks.rb:504:in `call' 
activesupport (4.2.5) lib/active_support/callbacks.rb:92:in `__run_callbacks__' 
activesupport (4.2.5) lib/active_support/callbacks.rb:778:in `_run_validation_callbacks' 
activemodel (4.2.5) lib/active_model/validations/callbacks.rb:113:in `run_validations!' 
activemodel (4.2.5) lib/active_model/validations.rb:337:in `valid?' 
activerecord (4.2.5) lib/active_record/validations.rb:58:in `valid?' 
activerecord (4.2.5) lib/active_record/validations.rb:83:in `perform_validations' 
activerecord (4.2.5) lib/active_record/validations.rb:37:in `save' 
activerecord (4.2.5) lib/active_record/attribute_methods/dirty.rb:21:in `save' 
activerecord (4.2.5) lib/active_record/transactions.rb:286:in `block (2 levels) in save' 
activerecord (4.2.5) lib/active_record/transactions.rb:351:in `block in with_transaction_returning_status' 
activerecord (4.2.5) lib/active_record/connection_adapters/abstract/database_statements.rb:211:in `transaction' 
activerecord (4.2.5) lib/active_record/transactions.rb:220:in `transaction' 
activerecord (4.2.5) lib/active_record/transactions.rb:348:in `with_transaction_returning_status' 
activerecord (4.2.5) lib/active_record/transactions.rb:286:in `block in save' 
activerecord (4.2.5) lib/active_record/transactions.rb:301:in `rollback_active_record_state!' 
activerecord (4.2.5) lib/active_record/transactions.rb:285:in `save' 
app/models/subscription.rb:61:in `processing! 

そして繰り返します。

Answer 1

私はロールを設定するafter_commitコールバックを追加するだけで問題を解決しました。

サブスクリプションモデルの更新されたコードは次のとおりです。

after_commit :set_merchant_role 

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