change view and action for announcement ,Lin checked. Also add validation for object_auth make sure for each object,the object will be unique for each action.

app/views/admin/components/_user_role_management.html.erb

@@ -1,7 +1,7 @@
 <div id="open_for_all_user">
 	<h1>All User</h1>
 	<%= form_tag(submit_url) do %>
-	<%= check_box_tag 'auth_all',true,auth.all  %><%= submit_tag 'Add Role' %><br/>
+	<%= check_box_tag 'auth_all',true,(auth.all rescue true)  %><%= submit_tag 'Add Role' %><br/>
 	<% end %>
 </div>