How to use jQuery with Rails 2.0 - aka How to fix "ActionController::InvalidAuthenticityToken (ActionController::InvalidAuthenticityToken)"
This is a slight variation of Henrik Nyh's code, which fixes an issue with IE6 that makes all Ajax requests use POST in IE6.
In application.html.erb, or whatever layout file you're using, put:
<%= javascript_tag "window.AUTH_TOKEN = '#{form_authenticity_token}';" %>
In application.js, or whatever JavaScript file you're using, put:
$(document).ajaxSend(function(event, request, settings) {
if (typeof(window.AUTH_TOKEN) == "undefined") return;
// IE6 fix for http://dev.jquery.com/ticket/3155
if (settings.type == 'GET' || settings.type == 'get') return;
settings.data = settings.data || "";
settings.data += (settings.data ? "&" : "") + "authenticity_token=" + encodeURIComponent(window.AUTH_TOKEN);
});
That's all...