嵌套表格未显示！

Question

我有一个看起来像这样的嵌套模型结构：

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

我正在尝试显示accounts#new页面以同时显示两种形式，但由于某些原因，仅显示帐户表单（screenshot。

这里是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-z\d_]+$/
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 %>

EDIT：该代码现在可用！

Answer 1

你为什么要fields_for ".."？

Answer 2

我使用HAML进行查看，即使在我的代码中，我也缺少= f.fields_for之前的=。感谢您的评论。