如何在轨中订购送货地址和账单地址

Question

在我的网上商店，每个订单都与送货地址和账单地址相关（当然，它们可以是相同的）。这是我第一次来模拟这种尝试：

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

这工作得很好，但现在的形式佣工不工作。即，form_for只会生成名称为address[zipcode]的字段，因此我必须手动将其破解以获得billing_address[zipcode]和shipping_address[zipcode]。

我想我可以使用单表继承的子类Address到ShippingAddress和BillingAddress，但是这似乎有点哈克给我（和Best way to model Customer <--> Address违背一些很好的答案）。

Answer 1

我有两个想法，你，要么或两者可以做的伎俩：

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

Class Order 
    belongs_to :address, :foreign_key => "billing_address_id" 
    belongs_to :address, :foreign_key => "shipping_address_id" 

请让他们与你的形式助手一个尝试，我很想知道，如果它出来您。希望能帮助到你！

Answer 2

您需要指定类名称，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 

要完成关联：

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