link_to method=>destroy not working in rails 3

Project: Build a simple Ruby on Rails application. Section: Introducing Views. The problem is that the destroy method does not work. Clicking on the destroy or delete link results in the show method. On searching the internet for solutions, the following is recommended, make sure //= require jquery, //= require jquery_ujs and //= require_tree are in application.js and also <%= javascript_include_tag :defaults %> and <%= csrf_meta_tag %> are in the head section of application.html.erb These entries have not solved the problem. Several posts indicate that the issue is around using the delete method as a GET. Can a working solution be documented please? Other suggestions involve using button_to instead of link_to but that solution does not result in the confirmation message being displayed. Can anyone please suggest works rounds for both the link_to and the button_to. Thanks