Add some code to wrap the Backbone.sync method, to add ?sessionId to a

url.

@@ -32,6 +32,19 @@ define(function(require) {
         return deferred;
     }
 
+    var authSync = function authSync(origSync, method, model, options) {
+        var args = _.toArray(arguments);
+        args.shift();
+        var url = options.url || _.result(model, 'url');
+        if (url) {
+            var sessionId = app.get('auth').get('sessionId');
+            if (sessionId) {
+                options.url = url + (url.indexOf('?') == -1 ? '?' : '&') + 'sessionId=' + sessionId;
+            }
+        }
+        return origSync.apply(this, args);
+    };
+
     var FacebookProvider = Backbone.Model.extend({
         initialize: function(data, globalOptions) {
             // early facebook javascript load
@@ -255,6 +268,15 @@ define(function(require) {
     }, {
         FacebookProvider: FacebookProvider,
         FormProvider: FormProvider,
+        wrapSync: function(origSync) {
+            return function() {
+                return authSync.apply(this, [origSync].concat(_.toArray(arguments)));
+            };
+        },
+        syncMixin: function(Class) {
+            Class.prototype.sync = Auth.wrapSync(Class.prototype.sync);
+            return Class;
+        },
     });
     return Auth;
 });