动态选择导轨4和ajax上的路由错误

Question

一直在处理此问题，无法弄清楚。

试图做出动态选择来根据状态选择城市。这是为设计用户注册页面，我认为这只是添加到路由错误。

Ajax代码：（资产/ Java脚本/ registration.js.coffee）

$ -> 
    $(document).on 'change', '#user_state_id', (evt) -> 
    $.ajax '/registrations/update_cities', 
    type: 'GET' 
    dataType: 'script' 
    data: { 
     state_id: $("#user_state_id option:selected").val() 
    } 
    error: (jqXHR, textStatus, errorThrown) -> 
     console.log("AJAX Error: #{textStatus}") 
    success: (data, textStatus, jqXHR) -> 
     console.log("Dynamic state select OK!") 

控制器（registrations_controller.rb）

def edit 
    @states = State.all 
    @cities = Cities.where("state_id = ?", State.first.id) 
end 

def update_cities 
    @cities = Cities.where("state_id = ?", params[:state_id]) 
    respond_to do |format| 
    format.js 
    end 
end 

更新JS：（视图/设计/注册/ update_cities。 js.coffee）

$("#user_city_id").empty().append("<%= escape_javascript(render(:partial => @cities)) %>") 

共用部分（视图/共享/ _city.html.erb）

<option value="<%= city.id %>"><%= city.name.titleize %></option> 

路线（供参考）

devise_for :users, controllers: {registrations: 'registrations'} do 
    get 'registrations/update_cities', as: 'update_cities' 
end 

误差（在日志）

ActionController::RoutingError (No route matches [GET] "/registrations/update_cities"): 

rake routes输出

  states GET /states(.:format)    states#index 
        POST /states(.:format)    states#create 
      new_state GET /states/new(.:format)   states#new 
      edit_state GET /states/:id/edit(.:format)  states#edit 
       state GET /states/:id(.:format)   states#show 
        PATCH /states/:id(.:format)   states#update 
        PUT /states/:id(.:format)   states#update 
        DELETE /states/:id(.:format)   states#destroy 
    new_user_session GET /users/sign_in(.:format)  devise/sessions#new 
     user_session POST /users/sign_in(.:format)  devise/sessions#create 
destroy_user_session DELETE /users/sign_out(.:format)  devise/sessions#destroy 
     user_password POST /users/password(.:format)  devise/passwords#create 
    new_user_password GET /users/password/new(.:format) devise/passwords#new 
    edit_user_password GET /users/password/edit(.:format) devise/passwords#edit 
        PATCH /users/password(.:format)  devise/passwords#update 
        PUT /users/password(.:format)  devise/passwords#update 
cancel_user_registration GET /users/cancel(.:format)  registrations#cancel 
    user_registration POST /users(.:format)    registrations#create 
new_user_registration GET /users/sign_up(.:format)  registrations#new 
edit_user_registration GET /users/edit(.:format)   registrations#edit 
        PATCH /users(.:format)    registrations#update 
        PUT /users(.:format)    registrations#update 
        DELETE /users(.:format)    registrations#destroy 
dashboards_list_zip GET /dashboards/list_zip(.:format) dashboards#list_zip 
    authenticated_root GET /       dashboards#index 
       root GET /       devise/sessions#new 

任何帮助理解。我正在尝试执行如下所示的操作：Kernal Garden;修改设计和州/市级。

Answer 1

得到它的工作是这样的： registration.js.coffee：

$ -> 
$(document).on 'change', '#user_state_id', (evt) -> 
$.ajax '/registrations/update_cities', 
    type: 'GET' 
    dataType: 'script' 
    data: { 
    state_id: $("#user_state_id option:selected").val() 
    } 
    error: (jqXHR, textStatus, errorThrown) -> 
    console.log("AJAX Error: #{textStatus}") 
    success: (data, textStatus, jqXHR) -> 
    console.log("Dynamic state select OK!") 

注册控制器：

def edit 
@states = State.all 
if current_user.state_id.nil? 
    @cities = City.where("state_id = ?", State.first.id) 
else 
    @cities = City.where("state_id = ?", current_user.state_id) 
end 
end 

def update_cities 
@cities = City.where("state_id = ?", params[:state_id]) 
respond_to do |format| 
    format.js 
end 
end 

感谢您的帮助！

Answer 2

您的registration.js.coffee coffeescript未呈现，因此它将无法使用update_cities的路由帮助程序。相反，它将路径视为相对于当前路径，因此它将变为/users/update_cities。

改变这一行：

$.ajax 'update_cities', 

这样：

$.ajax '/registrations/update_cities', 

让我们来试试这个路线：

devise_for :users, controllers: {registrations: 'registrations'} do 
end 

get '/users/update_cities', to: :registrations, as: 'update_cities' 

它可能需要把URL回到你有什么它之前，但这应该给你一个路线update_cities