Sort order items of an itemtype by date (created_on property)


Is there any way in the configuration to retreive all items of an ItemType sorted by date (created_on property) when runing search.

otherwise i have developped a server method without success: 

Innovator inn = this.getInnovator();

Item Items = inn.newItem("name of the ItemType","get");

Items.setAttribute("orderBy", "[name of the ItemType].created_on desc ");

return Items.apply();

Any help please ?