Question

我有一个感兴趣的表达形式，它使用以下模型

public class dsExpressionOfInterest
{
    public int dsExpressionOfInterestID { get; set; }

    [Required(ErrorMessage = "Please enter a Date")]
    [DataType(DataType.Date)]
    [Display(Name = "Date")]
    public DateTime Date { get; set; }

    [Required(ErrorMessage = "Please enter the Contact Person")]
    [Display(Name = "Contact Person")]
    public string ContactPerson { get; set; }

    [Required(ErrorMessage = "Please enter the Telephone Number")]
    [Display(Name = "Telephone")]
    public string Telephone { get; set; }

    [Required(ErrorMessage = "Please enter the nature of the query")]
    [Display(Name = "Nature of query")]
    public string NatureOfQuery { get; set; }

    public virtual dsRegistration dsRegistration { get; set; }
}

我还有注册表格，其中包含以下型号

public class dsRegistration
{
    public int dsRegistrationID { get; set; }

    public int dsExpressionOfInterestID { get; set; }

    [Display(Name = "SLA")]
    public bool SLAReceived { get; set; }

    [DataType(DataType.Date)]
    [Display(Name = "Date Received")]
    public DateTime? SLAReceivedDate { get; set; }

    public virtual dsExpressionOfInterest dsExpressionOfInterest { get; set; }
}

我的问题是我不确定如何设置这两个模型之间的关系。在创建注册记录之前，您必须在表达兴趣表中有一条记录。

我收到错误的那一刻

Unable to determine the principal end of an association between the types

实际上它是dsExpressionOfInterestID

上的一对一关系

我是否需要使用数据注释，如果是这样，有人能指出我正确的方向吗？

Answer 1

我认为问题在于，不清楚父母是什么以及儿童桌是什么。您是否尝试删除子类中父级的链接？

public class dsRegistration
{
    public int dsRegistrationID { get; set; }

    public int dsExpressionOfInterestID { get; set; }

    [Display(Name = "SLA")]
    public bool SLAReceived { get; set; }

    [DataType(DataType.Date)]
    [Display(Name = "Date Received")]
    public DateTime? SLAReceivedDate { get; set; }
}

.NET MVC一对一的关系

1 个答案: