根据第一个下拉菜单（Rails 3.2）的选择，启动管理员 - 第二个下拉菜单

问题描述

我无法在主动管理员中执行一个表单，第二个下拉菜单（子类别）必须在其前面的下拉列表中进行调整。 >基本上我想先为一家公司设立一个行业，然后选择分行业下降。我已经创建了两个模型：

• CompanySector


• CompanySubsector

由于实际原因，我在代码中使用sector和subsectors这个词。

我是试图在，但没有成功。

1-我创建路线

＃routes.rb

 资源：公司
 
 post'/ change_company_subsectors'=>'company_sectors＃change_company_subsectors'
  

2-我在Helpers / ApplicationHelper.rb中定义了一个包含ajax请求的定制助手

  def remote_request（type，path，params = {}，target_tag_id）
$。＃{type }（'＃{path}'，
 {＃{params.collect {| p | ＃{p [0]}：＃{p [1]}} .join（，）}}，
函数（数据）{$（'## {target_tag_id}'）数据）;} 
）;
 end 
  

我放在admin / company.rb这个方法：onchange操作

  controller do 
 def change_company_subsectors 
 @company_subsectors = CompanySector.find_by_id（params [：company_sector_id]）。try（：company_subsectors）
 render：text => view_context.options_from_collection_for_select（@company_subsectors，：id）
 end 
 end 
  

4-在我活跃的amdin表单admin / company.rb中，我在编辑表单中添加：

  form do | f | 
 
 f。输入companydo 
 
 f.input：company_sector_id，：input_html => {
：onchange => remote_request（：post，：change_company_subsectors，{：company_sector_id =>$ （'#company_sector_id'）。val（）}，：company_subsector_id） 
} 
 f.input：company_subsector_id 
 end 
  

但是结果是非常糟糕的：我甚至没有看到一个下降的人口与部门和分部门的可能性。

我应该看到的部门：休闲/旅游/时尚...但我什么也看不见。
我也看不到SubSectors。

我不应该使用formtastic集合，如：：as => ：select，：collection =>有没有人知道我犯了哪些错误？

>解决方案

首先，我建议不要将JS直接放在HTML元素上;以后我们经常会做这些事情：

 
 code> select1 = fieldset.find'select：first'＃Companies 
 select2 = fieldset.find'select：last'＃Users 
 select1.change（ - > 
 $。 get'/admin/users.json'，q：{company_id_eq：$（@）。val（）}，（data） - > 
 select2.html data.map（u） - & < option value =＃{u.id}>＃{u.name}< / option>
）.change（）
  / pre> 
I'm having trouble implementing a form on active admin where the second dropdown (subcategory) has to adjust to the category choice on the drop down that precedes it.

Basically I want to first set a industry for a company then select among sub-industry drop down. I have created 2 models:


CompanySector
CompanySubsector


For practical reasons, I use the words 'sector' and 'subsectors' in the code.

I am trying to use @okliv suggestions on Active Admin - refresh second drop down based on first drop down, Ruby on Rails but with no success.

1- I created a route

In #routes.rb
resources :companies

  post '/change_company_subsectors' =>'company_sectors#change_company_subsectors'
2- I defined a define helper containing ajax requestin Helpers/ApplicationHelper.rb
    def remote_request(type, path, params={}, target_tag_id)
       "$.#{type}('#{path}',
             {#{params.collect { |p| "#{p[0]}: #{p[1]}" }.join(", ")}},
             function(data) {$('##{target_tag_id}').html(data);}
    );"
    end
3- i put in admin/company.rb this method for :onchange action
    controller do
    def change_company_subsectors
      @company_subsectors = CompanySector.find_by_id(params[:company_sector_id]).try(:company_subsectors)
      render :text=>view_context.options_from_collection_for_select(@company_subsectors, :id)
      end
    end
4- And in my active amdin form admin/company.rb, i added this in the edit form:
form do |f|

f.inputs "company" do

  f.input :company_sector_id, :input_html => {
    :onchange => remote_request(:post, :change_company_subsectors, {:company_sector_id => "$('#company_sector_id').val()"}, :company_subsector_id)
  }
  f.input :company_subsector_id
end
But the results is very bad: I don't even see a dropdown populated with the Sectors and Subsectors possibilities.
I should see for Sectors: Leisure/Travel/Fashion... but I see nothing.And i see also nothing for SubSectors.
Shouldn't I use formtastic Collections like: :as => :select, :collection => CompanySubsector.all?
Does anyone know where I have made mistakes?
 解决方案 
First off I'd suggest against putting JS directly on an HTML element; it makes for much more difficult debugging later on.
Here's what I often do:
select1 = fieldset.find 'select:first' # Companies
select2 = fieldset.find 'select:last'  # Users
select1.change(->
  $.get '/admin/users.json', q: {company_id_eq: $(@).val()}, (data)->
    select2.html data.map (u)-> """<option value="#{u.id}">#{u.name}</option>"""
).change()
                        
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