这可以实现为自定义绑定:

kendo.data.binders.required = kendo.data.Binder.extend({
  refresh: function() {
    var required = this.bindings.required.get();
    if (required) {
      this.element.setAttribute("required", "required");
    } else {
      this.element.removeAttribute("required");
    }
  }
});

这是一个实时演示: http://jsbin.com/atozib/1/edit