Ruby on rails 使用carmen gem获取州名称时面临的问题

嗨，我在我的应用程序中使用了

gem'carmenrails'

，我有这种类型的关联

class Employee < ActiveRecord::Base
  has_one :contact
  has_one :permanent_address
  accepts_nested_attributes_for :contact, :permanent_address
end

在我的路线中：

resources :employees do
    collection do
      get 'subregion_options'
    end
  end

在my employees/new.html.erb中

<%= form_for @employee do |f| %>
  <label class="form_label">Email</label>
  <%= f.text_field :email %>
  <label class="form_label">Set Ex Employee</label>
  <%= f.check_box :is_active %>  
  <%= f.fields_for :contact do |c| %>    
    <label class="form_label">Address 1</label>  
    <%= c.text_field :current_address1 %> 
    <%= c.country_select :country,:prompt => 'Select Country' %>
    <%= render partial: 'subregion_select', locals: {parent_region: c.object.country} %>
  <% end %>
  <%= f.submit %>
<% end %>

---

但它不会吸引任何州。请指导如何解决这个问题。提前感谢。

您得到的结果是什么？它显示在该条件下没有任何内容

elsif country.subregions但无法显示相应的状态尝试
子区域\u选择\u标记（名称、值、父区域\u或\u代码）
它实际上完成了它的fetchinbg，但它的css是display none，所以当我将其更改为display:block时；有效：）
<%= form_for @employee do |f| %>
  <label class="form_label">Email</label>
  <%= f.text_field :email %>
  <label class="form_label">Set Ex Employee</label>
  <%= f.check_box :is_active %>  
  <%= f.fields_for :contact do |c| %>    
    <label class="form_label">Address 1</label>  
    <%= c.text_field :current_address1 %> 
    <%= c.country_select :country,:prompt => 'Select Country' %>
    <%= render partial: 'subregion_select', locals: {parent_region: c.object.country} %>
  <% end %>
  <%= f.submit %>
<% end %>

<div id="order_state_code_wrapper">
  <% parent_region ||= params[:parent_region] %>
  <% country = Carmen::Country.coded(parent_region) %>

  <% if country.nil? %>
    <em>Please select a country above</em>
  <% elsif country.subregions? %>
    <%= subregion_select(:contact, :state_code, parent_region) %>
  <% else %>
    <%= text_field(:contact, :state_code) %>
  <% end %>
</div>

$('select#employee_contact_attributes_country').change(function() {
    selectWrapper = $('#order_state_code_wrapper');
    countryCode = $(this).val();
    url = "/employees/subregion_options?parent_region=" + countryCode;
    selectWrapper.load(url);
  });