如何在軌中訂購送貨地址和賬單地址

Question

在我的網上商店，每個訂單都與送貨地址和賬單地址相關（當然，它們可以是相同的）。這是我第一次來模擬這種嘗試：

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

這工作得很好，但現在的形式傭工不工作。即，form_for只會生成名稱爲address[zipcode]的字段，因此我必須手動將其破解以獲得billing_address[zipcode]和shipping_address[zipcode]。

我想我可以使用單表繼承的子類Address到ShippingAddress和BillingAddress，但是這似乎有點哈克給我（和Best way to model Customer <--> Address違背一些很好的答案）。

Answer 1

我有兩個想法，你，要麼或兩者可以做的伎倆：

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" 

請讓他們與你的形式助手一個嘗試，我很想知道，如果它出來您。希望能幫助到你！

Answer 2

您需要指定類名稱，因爲它不是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 

要完成關聯：

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