Rails 3 - 如何編輯單個嵌套多態資源？

Question

在我的Rails 3.0應用程序中，我有一個客戶端模型和一個多態地址模型。根據下面的代碼，客戶端可以有很多地址。我希望我的表單一次更新單個客戶端地址。我只能看到[addresses_attributes]出現，如果我允許同時編輯所有客戶端的地址。有沒有解決的辦法？

class Client < ActiveRecord::Base 
has_many :addresses, :as => :addressable, :dependent => :destroy 
accepts_nested_attributes_for :addresses 

class Address < ActiveRecord::Base 
    belongs_to :addressable, :polymorphic => true 

客戶端控制器

def edit 
    @client = Client.find(params[:id]) 
    @addresses = @client.addresses 
    if params[:address] 
     @address = @client.addresses.find(params[:address]) 
    else 
     @addresses ? @address = @addresses.first : @address = [] 
    end 
    end 

    def update 
    @client = Client.find(params[:id]) 
    @client.update_attributes(params[:client]) 
    redirect_to client_path(@client) 
    end 

查看

<%= form_for @client do |f| %> 
    <%= render :partial => 'form', :locals => {:f => f} %> 

    <%= f.fields_for @address do |addresses_attributes| %> 
    <%= render :partial => 'addresses/fields', :locals => {:f => addresses_attributes} %>    
    <% end %> 

    <%= f.submit %> 
<% end %> 

Answer 1

編輯：

對不起，我重讀後，意識到有更好的選擇。您應該將範圍添加到地址模型中，或者您應該使用條件在客戶端中創建單獨的關聯。

http://railscasts.com/episodes/108-named-scope 或看情況在這裏： http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html

詳細信息：

class Address < ActiveRecord::Base 
    belongs_to :addressable, :polymorphic => true 
    named_scope :type_one, :conditions => { :address_type => 'one' } 
    named_scope :type_two, :conditions => { :address_type => 'two' } 

<%= f.fields_for @address.type_one do |addresses_attributes| %> 
    <%= render :partial => 'addresses/fields', :locals => {:f => addresses_attributes} %>    
<% end %>