当调用OnAuthorization方法时

我已经实现了一种自定义方法，使用户信息可用于具有类似以下smth的视图：

    protected override void OnAuthorization(AuthorizationContext filterContext)
    {
        if (HttpContext.User != null)
        {
            HttpCookie authCookie = Request.Cookies[FormsAuthentication.FormsCookieName];
            if (authCookie != null)
            {
                FormsAuthenticationTicket authTicket = FormsAuthentication.Decrypt(authCookie.Value);
                JavaScriptSerializer serializer = new JavaScriptSerializer();
                AWESOMEUser user = serializer.Deserialize<AWESOMEUser>(authTicket.UserData);
                if (user == null)
                {
                    HttpContext.User = null;
                }
                else
                {
                    HttpContext.User = new PlatformUser(typeof(DBMembershipProvider).Name, user);
                }
            }
            else
            {
                HttpContext.User = null;
            }
        }
        base.OnAuthorization(filterContext);
}

问题是，当用户信息（尤其是权限）在数据库中发生更改时，它不会反映在视图中。我应该在每次通话时都更新它吗？这里有更聪明的方法，即其他有助于自动更新用户信息的方法？