ruby-on-rails – 嵌套表单没有出现！

resources :users,:path => '/' do
    resources :accounts do
        resources :characters
    end
end

我正在尝试获取帐户#new页面以显示两个表单但由于某种原因仅显示帐户表单(screenshot).

这是git：https://github.com/imjp/d2shed

account.rb

class Account < ActiveRecord::Base
attr_accessible :account_name,:realm
accepts_nested_attributes_for :characters

belongs_to :user
has_many :characters,:dependent => :destroy 

validates :account_name,:presence => 'true',:length => { :in => 4..20 },:uniqueness => 'true'

validates_presence_of :realm
validates_format_of :account_name,:with => /^[A-Za-zd_]+$/
end

accounts_controller.rb

def new 
    @user = User.find(params[:user_id])
    @account = Account.new
    @account.characters.build
end

_form.html.erb

<%= form_for([@user,@account]) do |f| %>
<div class="field">
<%= f.label :account_name %><br />
<%= f.text_field :account_name %>
</div>
<div class="field">
<%= f.radio_button(:realm,"USWest") %>
    <%= f.label(:realm,"USWest") %>

    <%= f.radio_button(:realm,"USEast") %>
    <%= f.label(:realm,"USEast") %>

    <%= f.radio_button(:realm,"Europe") %>
    <%= f.label(:realm,"Europe") %>

    <%= f.radio_button(:realm,"Asia") %>
    <%= f.label(:realm,"Asia") %>
 </div>     

<%= f.fields_for :character do |character_form| %>

        <div class="field"> 
            Name: <%= character_form.text_field :name %>
        </div> 
    <% end %>

 <div class="actions">
<%= f.submit %>
</div>
<% end %>

编辑：代码现在工作！