Apply publish/subscribe for OrderArticle#update

app/controllers/finance/balancing_controller.rb

@@ -29,6 +29,12 @@ class Finance::BalancingController < Finance::BaseController
 
     render layout: false if request.xhr?
   end
+  
+  def new_on_order_article_update # See publish/subscribe design pattern in /doc.
+    @order_article = OrderArticle.find(params[:order_article_id])
+    
+    render :layout => false
+  end
 
   def update_summary
     @order = Order.find(params[:id])

app/views/finance/balancing/new.html.haml

@@ -1,3 +1,18 @@
+- content_for :javascript do
+  :javascript
+    $(function() {
+      // Subscribe to database changes.
+      // See publish/subscribe design pattern in /doc.
+      $(document).on('OrderArticle#update', function(e) {
+        $.ajax({
+          url: '#{new_on_order_article_update_finance_order_path(@order)}',
+          type: 'get',
+          data: {order_article_id: e.order_article_id},
+          contentType: 'application/json; charset=UTF-8'
+        });
+      });
+    });
+
 - title t('.title', name: @order.name)
 
 - content_for :sidebar do

app/views/finance/balancing/new_on_order_article_update.js.erb

@@ -0,0 +1,14 @@
+// Handle more advanced DOM update after AJAX database manipulation.
+// See publish/subscribe design pattern in /doc.
+(function(w) {
+  $('#order_article_<%= @order_article.id %>').html(
+    '<%= j render('finance/balancing/order_article', order_article: @order_article) %>'
+  );
+  
+  $('#group_order_articles_<%= @order_article.id %>').html(
+    '<%= j render('finance/balancing/group_order_articles', order_article: @order_article) %>'
+  );
+  
+  $('#summaryChangedWarning').show();
+})(window);
+

app/views/finance/order_articles/update.js.erb

@@ -0,0 +1,9 @@
+// Publish database changes.
+// See publish/subscribe design pattern in /doc.
+$(document).trigger({
+  type: 'OrderArticle#update',
+  order_article_id: <%= @order_article.id %>
+});
+
+$('#modalContainer').modal('hide');
+

app/views/finance/order_articles/update.js.haml

@@ -1,4 +0,0 @@
-$('#modalContainer').modal('hide');
-$('#order_article_#{@order_article.id}').html('#{j(render('finance/balancing/order_article', order_article: @order_article))}');
-$('#group_order_articles_#{@order_article.id}').html('#{j(render('finance/balancing/group_order_articles', order_article: @order_article))}');
-$('#summaryChangedWarning').show();

config/routes.rb

@@ -145,6 +145,8 @@ Foodsoft::Application.routes.draw do
           get :confirm
           put :close
           put :close_direct
+          
+          get :new_on_order_article_update
         end
 
         resources :order_articles