Added ajax for town selection

app/assets/javascripts/application.js

@@ -15,6 +15,7 @@
 //= require turbolinks
 //= require leaflet
 //= require_self
+//= require registration
 
 $(function () {
   $(document).on('click', '.smooth-scroll', function (e) {

app/assets/javascripts/registration.js.coffee

@@ -0,0 +1,12 @@
+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://coffeescript.org/
+
+$ ->
+  $(document).on 'change', '#municipality_id', (evt) ->
+    $.ajax 'update_towns',
+      type: 'GET'
+      dataType: 'script'
+      data: {
+        municipality_id: $("#municipality_id option:selected").val()
+      }

app/assets/stylesheets/application.css.scss

@@ -17,6 +17,7 @@
  *= require forms
  *= require alerts
  *= require leaflet
+ *= require registration
  *= require_self
  */
 

app/assets/stylesheets/registration.scss

@@ -0,0 +1,7 @@
+// Place all the styles related to the Registration controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/
+
+select {
+    min-width: 450px;
+}

app/controllers/registrations_controller.rb

@@ -0,0 +1,23 @@
+class RegistrationsController < Devise::RegistrationsController
+  def new
+    @municipalities = Municipality.order('name ASC')
+    set_towns
+    super
+  end
+
+  def update_towns
+    set_towns
+    respond_to do |format|
+      format.js
+    end
+  end
+
+  private
+    def set_towns
+      if params[:municipality_id].present?
+        @towns = Town.where('municipality_id = ?', params[:municipality_id]).order('name ASC').includes(municipality: :state)
+      else
+        @towns = Town.none
+      end
+    end
+end

app/helpers/registration_helper.rb

@@ -0,0 +1,2 @@
+module RegistrationHelper
+end

app/views/schools/registrations/_school_fields.html.erb

@@ -1,3 +1,12 @@
 <%= form.input :name %>
-<%= form.association :town, collection: Town.order('name ASC').includes(municipality: :state), label_method: :full_name %>
+
+<%= form.input :town,
+    input_html: { id: 'municipality_id' },
+    collection: @municipalities,
+    required: true,
+    label_method: :name,
+    label: I18n.t('activerecord.models.municipality'),
+    :include_blank => true %>
+
+<%= form.association :town, collection: @towns, label_method: :full_name %>
 <%= form.input :address %>

app/views/schools/registrations/update_towns.js.coffee

@@ -0,0 +1 @@
+$("#school_town_id").empty().append("<%= escape_javascript(render(:partial => @towns)) %>")

app/views/schools/towns/_town.html.erb

@@ -0,0 +1 @@
+<option value="<%= town.id %>"><%= town.full_name %></option>

config/routes.rb

@@ -16,14 +16,15 @@
   resources :frequently_asked_questions, path: 'frequently-asked-questions'
 
   as :school do
+    get 'schools/update_towns', to: 'registrations#update_towns', as: :update_towns
     get 'schools/profile', to: 'devise/registrations#edit', as: :school_root
   end
 
   as :speaker do
     get 'speakers/profile', to: 'devise/registrations#edit', as: :speaker_root
   end
 
-  devise_for :schools
+  devise_for :schools, :controllers => {:registrations => "registrations"}
   devise_for :speakers
   devise_for :admin_users, ActiveAdmin::Devise.config
   ActiveAdmin.routes(self)