ruby-on-rails - accepts_nested_attributes_for 停止我的子表单渲染？

Question

我有 2 个模型之间的关联，Business 和 Address。企业有注册地址的地方。我这样做了如下。

class Business < ActiveRecord::Base  
    has_one :registered_address, :class_name => "Address", :foreign_key => :business_registered_address_id
    accepts_nested_attributes_for :registered_address
end

class Address < ActiveRecord::Base
    belongs_to :business
end

这个关联对我来说很好用。当我使用以下方法渲染表单时:

= form_for @business do |form|
  = form.inputs :name => "Registered address" do
    = form.fields_for :registered_address do |address|
      = address.input :postcode
      = address.input :line_1
      = address.input :line_2
      = address.input :line_3
      = address.input :town
      = address.input :county

什么都没有显示，只是一个空的字段集。

当我注释掉业务模型中的 accepts_nested_attributes_for 行时，它会正确显示(但不保存)所有字段。

谁能看到我做错了什么？

谢谢

Answer 1

在您的 Controller 中写入此操作(我认为 new)

def new
  @business = Business.new
  @business.build_registered_address
  ...
end

或以您的形式 @business.registered_address.new

= form_for @business do |form|
  = form.inputs :name => "Registered address" do
    = form.fields_for :registered_address, @business.registered_address.new do |address|
      = address.input :postcode
      = address.input :line_1
      = address.input :line_2
      = address.input :line_3
      = address.input :town
      = address.input :county