Rails 3 - 如何编辑单个嵌套多态资源？

Question

在我的Rails 3.0应用程序中，我有一个客户端模型和一个多态地址模型。根据下面的代码，客户端可以有很多地址。我希望我的表单一次更新单个客户端地址。我只能看到[addresses_attributes]出现，如果我允许同时编辑所有客户端的地址。有没有解决的办法？

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 

客户端控制器

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

编辑：

对不起，我重读后，意识到有更好的选择。您应该将范围添加到地址模型中，或者您应该使用条件在客户端中创建单独的关联。

http://railscasts.com/episodes/108-named-scope 或看情况在这里： http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html

详细信息：

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 %>