Question

我有两个模型Invoice和Client，它们有一对多的关系。我的问题是当我尝试创建新发票时，modelstate变为false，因为未填充Client对象的必填字段。我试图设置默认值，例如int property {get; set;} = 1;但是当我尝试检索关系模型时，这会导致覆盖属性值。我是asp.net的新手，我们将不胜感激。

这是我的客户端型号代码：

public class Client
{
    public int ClientId { get; set; }//Primary key

    [Required]
    [Display(Name = "Client/Company Name")]
    public string Name { get; set; }

    //.....


    public List<Invoice> Invoices { get; set; }

}

发票型号：

public class Invoice
{
    public int InvoiceId { get; set; }//Primary key

    [Required]
    [Display(Name = "Client/Company Name")]
    public int ClientId { get; set; }//Foreign key
    public Client client { get; set; }

    //....

}

我保存发票的代码：

[HttpPost]//Save quote & redirect to edit quote
    public IActionResult Create(Invoice quote)
    {
        ViewData["Title"] = "Create Quotation";//Set title of the view!

        if (ModelState.IsValid)//If quote is validated to true.
        {
            _context.Invoices.Add(quote);//insert quote
            _context.SaveChanges();

            //Redirect to edit page to add items to the invoice
            return RedirectToAction("Edit", new { id = quote.InvoiceId });
        }

        //...
    }

我的代码用于检索具有客户名称的发票

public IActionResult Index()
    {
        ViewData["Title"] = "Quotations";//Set title of the view!
        //Return with array of all quotations.
        return View(_context.Invoices.Include(i => i.client).Where(i => i.isQuote == true).ToArray());
    }

任何提示或帮助都将不胜感激。

Answer 1

找到一个更简单的解决方案：

只需添加virtual关键字和GG

即可发票模型中的

：

public class Invoice
{
    public int InvoiceId { get; set; }//Primary key

    [Required]
    [Display(Name = "Client/Company Name")]
    public int ClientId { get; set; }//Foreign key
    public virtual Client client { get; set; }

    //....

}

对于具有必填字段的关系，ModelState为false

1 个答案: