public ActionResult Display(RoleQueryModel query_model)
        {
            Role model = Role.AsQueryable().Where(x => x._id == query_model.Id).FirstOrDefault();

            if (model != null)
            {
                return View(model);
            }
            return HttpNotFound();
        }
        public ActionResult Edit(RoleQueryModel query_model)
        {
            Role role = Role.AsQueryable().Where(x => x._id == query_model.Id).FirstOrDefault();

            if (role != null)
            {
                RoleEditModel model = new RoleEditModel();
                model.Id = role._id;
                model.Name = role.Name;
                model.Description = role.Description;

                return View(model);
            }

            return HttpNotFound();
        }