c# - Code First 迁移和 SQL Server Management Studio 的问题

Question

我正在开发的应用程序的数据库出现问题。我有两个类(class) - House 和 Donation。捐赠需要有与之关联的房屋。

public class House
{
    [Key]
    public int HouseId { get; set; }

    public string AddressLine1 { get; set; }

    public string AddressLine2 { get; set; }

    public string AddressLine3 { get; set; }

}

public class Donation
{
    [Key]
    public int DonationId { get; set; }

    public string TypeOfDonation { get; set; }

    public decimal Amount { get; set; }

    [ForeignKey("Church")]
    public int ChurchId { get; set; }

    [ForeignKey("House")]
    public int HouseId { get; set; }

    public virtual House House { get; set; }
    public virtual Church Church { get; set; }

}

我已经多次使用 Code First Migrations 并且它有效，但我遇到了两个错误。我注意到的第一个是 SQL Server Studio with Donation。它为所有这些都提供了无效的列名

然后，当我运行应用程序并尝试将 Donation 与 House 相关联时，我收到此错误 INSERT 语句与 FOREIGN KEY 约束冲突 “FK_dbo.Donation_dbo.House_HouseId”。冲突发生在数据库“ChurchDatabase”、表“dbo.House”、“HouseId”列中。

这是在我的 DonationController 中创建时出现的错误:

 [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create([Bind(Include = "DonationId,HouseId,TypeOfDonation,Amount,ChurchId")] Donation donation)
    {
        if (ModelState.IsValid)
        {
            db.Donations.Add(donation);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        ViewBag.ChurchId = new SelectList(db.Churches, "ChurchId", "Name", donation.ChurchId);
        return View(donation);
    }

有人知道发生了什么事吗？它一直在破坏我的头脑

Answer 1

找到我的问题，它在我的 View 中:

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

它需要是:

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

当它不需要 House 位时，我愚蠢地放下了 House.HouseId