diff --git a/xiongbo/409-active-model-serializers/blog/app/helpers/application_helper.rb b/xiongbo/409-active-model-serializers/blog/app/helpers/application_helper.rb
index de6be794..e096e525 100644
--- a/xiongbo/409-active-model-serializers/blog/app/helpers/application_helper.rb
+++ b/xiongbo/409-active-model-serializers/blog/app/helpers/application_helper.rb
@@ -1,2 +1,7 @@
 module ApplicationHelper
+  def json_for(target, options = {})
+    options[:scope] ||= self
+    options[:url_options] ||= url_options
+    target.active_model_serializer.new(target, options).to_json
+  end
 end
diff --git a/xiongbo/409-active-model-serializers/blog/app/views/articles/index.html.erb b/xiongbo/409-active-model-serializers/blog/app/views/articles/index.html.erb
index c06e76c8..a425954a 100644
--- a/xiongbo/409-active-model-serializers/blog/app/views/articles/index.html.erb
+++ b/xiongbo/409-active-model-serializers/blog/app/views/articles/index.html.erb
@@ -1,6 +1,6 @@
 <h1>Articles</h1>
 
-<div id="articles">
+<div id="articles" data-articles="<%= json_for @articles %>">
 <% @articles.each do |article| %>
   <h2>
     <%= link_to article.name, article %>