在拥有必要的fk MVC时编辑对象

Question

下午好，我的问题有些混乱。我有两个对象，一个取决于另一个要创建的对象。对象＃1是“本地”，对象＃2是“NotasAdjuntas”。要创建“NotasAdjuntas”，我需要知道它属于哪个“本地”。

NotasAdjuntas Class

public class NotasAdjuntas
{
    public int Id { get; set; }

    [Required]
    [MinLength(3)]
    [MaxLength(20)]
    public string Asunto { get; set; }
    [Required]
    public string Detalle { get; set; }
    [DataType(DataType.Date)]
    public DateTime Fecha { get; set; }
    [DataType(DataType.Time)]
    public DateTime Hora { get; set; }

    [Required] //I've added a requiered so when I delete a "Local", it automatically deleted all the "notasAjuntas" that belong to it. 
    public  virtual Local local { get; set; }

    public virtual string username { get; set; }

}

我的问题是当我尝试编辑“notasAdjuntas”时，我收到一条错误消息，指出“Local”字段是必需的，因此它不会验证模型。我想编辑的唯一内容是Asunto和Detalle。 Fecha和Hora需要保持不变。

这是我的编辑观点：

 @model AutoPlanMCV.Models.NotasAdjuntas

@{
    ViewBag.Title = "Edit";
}

<h2>Edit</h2>

@using (Html.BeginForm())
{
    @Html.AntiForgeryToken()

    <div class="form-horizontal">
        <h4>NotasAdjuntas</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        @Html.HiddenFor(model => model.Id)

        <div class="form-group">
            @Html.LabelFor(model => model.Asunto, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Asunto, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Asunto, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Detalle, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Detalle, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Detalle, "", new { @class = "text-danger" })
            </div>
        </div>


        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Save" class="btn btn-default" />
            </div>
        </div>
    </div>`enter code here`
}

这些是编辑方法：

 public ActionResult Edit(int? id,int localId)
        {
            Session["LocalIdEditNotasAdjuntas"] = localId;
            if (id == null)
            {
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
            }
            NotasAdjuntas notasAdjuntas = db.Notas.Find(id);
            if (notasAdjuntas == null)
            {
                return HttpNotFound();
            }
            return View(notasAdjuntas);
        }


        [HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult Edit(NotasAdjuntas notasAdjuntas) 
        {
            var id = Session["LocalIdEditNotasAdjuntas"].ToString();
            int localId = 0;
            int.TryParse(id, out localId);
            Local local = db.Locales.Find(localId);
            notasAdjuntas.local = local;

            if (ModelState.IsValid)
            {

                //db.Entry(notasAdjuntas).State = EntityState.Modified;
                NotasAdjuntas original = db.Notas.Find(notasAdjuntas.Id);
                original.local = notasAdjuntas.local;
                original.Asunto = notasAdjuntas.Asunto;
                original.Detalle = notasAdjuntas.Detalle;
                original.Id = notasAdjuntas.Id;
                db.SaveChanges();
                Session["LocalIdEditNotasAdjuntas"] = null;
                return RedirectToAction("Details", "Locals", new { id = localId });
            }
            return View();
        }

感谢您的帮助！