Rails接受\嵌套的\属性\用于:如果不工作则拒绝\u

我放弃了试图超越 autosave 参数,因为我认为它不能完成。
我感动了 has_shipping_address 从 Order 到 ShippingAddress 现在我有了:

#the models..
class Order < ActiveRecord::Base

  belongs_to :billing_address
  belongs_to :shipping_address 

  accepts_nested_attributes_for :billing_address
  accepts_nested_attributes_for :shipping_address, :reject_if => proc { |attributes| attributes["has_shipping_address"] != '1' }

  def after_initialize                       
    self.build_billing_address unless billing_address
    self.build_shipping_address unless shipping_address
  end

end

class ShippingAddress < OrderAddress
  attr_accessor :has_shipping_address  
end

class OrderAddress < ActiveRecord::Base
  validates_presence_of :name
  #more validations here..
end   

#the view
<% form_for @order do |f| %>
  #...
  <% f.fields_for :shipping_address do |addr_f| %>
    <%= addr_f.check_box :has_shipping_address %>
    <%= addr_f.text_field :name %>
    #more fields for the address..
  <% end %>
<% end %>

问题是 :reject_if 似乎做不到这是工作。不管价值是多少 有发货地址 是, save 方法仍在嵌套的 船舶地址 ,导致验证错误。

我在这里做错什么了吗?这有点让人沮丧。