我需要在更新视图上覆盖 get_object（）方法，不要需要重写form_valid。自定义 get_object（）方法是：

I need to override the get_object() method on the update view and do not need to override form_valid. The custom get_object() method is:

    def get_object(self, queryset=None):
        return self.request.user