Ruby on rails 在Rails中，在事务完成后应用增量

用户进行交易，可能带有优惠券代码，最后状态更改，购物车标记为已完成，邮件发送。我试图做的是更新使用的优惠券代码，并进行增量更改。目前，交易的订单模型具有以下内容：

class TbCommerce::Order < ActiveRecord::Base
 self.table_name = 'tb_commerce_orders'
 scope :search, ->(term){ where('name LIKE ?', "%#{term}%") }

 belongs_to :cart, :inverse_of => :order, :foreign_key => :tb_commerce_cart_id
 has_many :transactions, :inverse_of => :order, :foreign_key => :tb_commerce_order_id
 has_one :captured_transaction, ->{ captured }, :class_name => 'TbCommerce::Transaction', :foreign_key => :tb_commerce_order_id

 validates_presence_of :cart, :name, :address, :city, :state, :postal, :country
 validates_uniqueness_of :cart
 validates_length_of :address, :maximum => 30
 validates :email, :format => {:with => Authlogic::Regex.email, :message => 'should look like an email address.'}
 before_create :set_invoice_number

 define_callbacks :capture
 set_callback :capture, :after, :after_capture

 def description
  return cart.description
end

module Status
OPEN = 'open'
PLACED = 'placed'
SHIPPED = 'shipped'
REFUNDED = 'refunded'
REMOVED = 'deleted'
end

def full_name
 return name
end

def full_address
 return "#{address}, #{city} #{state}, #{postal}, #{country}"
end

private

def set_invoice_number
  new_invoice_number = TbCommerce::Order.maximum(:invoice_number) || 1000000
loop do
  new_invoice_number += 1
  break unless TbCommerce::Order.exists?(:invoice_number => new_invoice_number)
end
self.invoice_number = new_invoice_number
end

def after_capture
  update_attribute(:status, Status::PLACED)
  cart.update_attribute(:is_completed, true)
  coupon.update(:used => used + 1)
  TbCommerce::OrderMailer.order_placed(self).deliver_later
  TbCommerce::OrderMailer.order_confirmation(self).deliver_later
  begin
    TbCommerce.after_capture.call(self)
  rescue e
    logger.error "Failed to run the after_capture hook with message: #{e}"
  end
   return true
  end

 end

<% @coupons.each do |coupon| %>
 <%= coupon.code %>
 <%= coupon.used %>
<% end %>

def increment_coupon_used!
 coupon.increment_used! if coupon.present?
return true

def increment_used!
 update(:used => used + 1)
end

使用的增值券！实际上是：

class TbCommerce::Order < ActiveRecord::Base
 self.table_name = 'tb_commerce_orders'
 scope :search, ->(term){ where('name LIKE ?', "%#{term}%") }

 belongs_to :cart, :inverse_of => :order, :foreign_key => :tb_commerce_cart_id
 has_many :transactions, :inverse_of => :order, :foreign_key => :tb_commerce_order_id
 has_one :captured_transaction, ->{ captured }, :class_name => 'TbCommerce::Transaction', :foreign_key => :tb_commerce_order_id

 validates_presence_of :cart, :name, :address, :city, :state, :postal, :country
 validates_uniqueness_of :cart
 validates_length_of :address, :maximum => 30
 validates :email, :format => {:with => Authlogic::Regex.email, :message => 'should look like an email address.'}
 before_create :set_invoice_number

 define_callbacks :capture
 set_callback :capture, :after, :after_capture

 def description
  return cart.description
end

module Status
OPEN = 'open'
PLACED = 'placed'
SHIPPED = 'shipped'
REFUNDED = 'refunded'
REMOVED = 'deleted'
end

def full_name
 return name
end

def full_address
 return "#{address}, #{city} #{state}, #{postal}, #{country}"
end

private

def set_invoice_number
  new_invoice_number = TbCommerce::Order.maximum(:invoice_number) || 1000000
loop do
  new_invoice_number += 1
  break unless TbCommerce::Order.exists?(:invoice_number => new_invoice_number)
end
self.invoice_number = new_invoice_number
end

def after_capture
  update_attribute(:status, Status::PLACED)
  cart.update_attribute(:is_completed, true)
  coupon.update(:used => used + 1)
  TbCommerce::OrderMailer.order_placed(self).deliver_later
  TbCommerce::OrderMailer.order_confirmation(self).deliver_later
  begin
    TbCommerce.after_capture.call(self)
  rescue e
    logger.error "Failed to run the after_capture hook with message: #{e}"
  end
   return true
  end

 end

<% @coupons.each do |coupon| %>
 <%= coupon.code %>
 <%= coupon.used %>
<% end %>

def increment_coupon_used!
 coupon.increment_used! if coupon.present?
return true

def increment_used!
 update(:used => used + 1)
end

最近更新：

---

看起来记录器有我得到的错误。NoMethodError:未定义的方法'increment！'在@coupon.increment！：使用过甚至是TbCommerce:：优惠券。增量！：使用了

，因此出现了两个问题。首先是有一段感情，而我并没有正确地处理它。我最后做的是：

cart.increment_coupon_used!

Cart实际上包含了与订单具有关系的ValidateGroupon模型

---

存在的另一个问题是本地应用程序覆盖了这个gem。因此，在我将优惠券包含在购物车模型中之前，它永远不会起作用。

优惠券.update:used=>used+1是否返回true？我可能遗漏了一些内容，但如果要访问当前值：used，则必须将其保存在变量中，或者像updateused一样传递它：@tupoly.used+1。尝试@PatMellon@dbugger它确实返回true，然后它正在更新。所以要么你要么：a提供了错误的值；b在捕获后再次更新；或者c看着错误的优惠券对象。你怎么确定它没有增加？恭喜你弄明白了。