ruby-on-rails - 如何在 rails 中给订单送货地址和账单地址

Question

在我的在线商店中，每个订单都与一个送货地址和一个账单地址相关联(当然，它们可以相同)。这是我第一次尝试对此建模:

Class Order
  belongs_to :billing_address, :class => "Address"
  belongs_to :shipping_address, :class => "Address"

这工作得很好，但现在表单助手不工作了。即，form_for 只会生成名称如 address[zipcode] 的字段，所以我必须手动破解它才能获得 billing_address[zipcode] 和送货地址[邮政编码]。

我想我可以使用单表继承将 Address 子类化为 ShippingAddress 和 BillingAddress，但这对我来说似乎有点老套(而且与 Best way to model Customer <--> Address 中的一些好的答案相矛盾。

Answer 1

您需要指定类名，因为它不是 BillingAddress 或 ShippingAddress。

class Order < ActiveRecord::Base
  # foreign key not required here because it will look for
  # association_name_id, e.g. billing_address_id, shipping_address_id
  belongs_to :billing_address, :class_name => "Address"
  belongs_to :shipping_address, :class_name => "Address"
end

完成关联:

class Address < ActiveRecord::Base
  # foreign key required here because it will look for class_name_id, 
  # e.g. address_id
  has_many :billing_orders, :class_name => "Order", 
    :foreign_key => "billing_address_id" 
  has_many :shipping_orders, :class_name => "Order", 
    :foreign_key => "shipping_address_id"
end