Question

我遇到了两个实体之间关系的问题;

我的课程如下;

public class Cis 
{
     [Key]
     public int CisId { get; set; }
     public int ProjectId { get; set; }

     [ForeignKey("ProjectId")] 
     public virtual ICollection<Overhead> Overheads { get; set; }

}   

public class Overhead 
{
    public int Id { get; set; }     
    public int ProjectId { get; set; }
    public SecuredWorkType SecuredWorkType { get; set; }
    public decimal? OverheadRecoveryTotalValue { get; set; }
    public decimal? BudgetedFinancialResultValue { get; set; }
    public decimal? SecuredValue { get; set; }
    public decimal? OverheadRecoveryTotalPercentage { get; set; }
}

当我尝试保存带有多个开销的CIS对象时，我收到以下错误

The INSERT statement conflicted with the FOREIGN KEY constraint "FK_dbo.Overhead_dbo.Cis_ProjectId". The conflict occurred in database "CisLatest", table "dbo.Cis", column 'CisId'.The statement has been terminated."

由于设计方面的考虑，我无法在Cis上使用CisId作为我的外键 - 当我使用CisId作为外键时，它运行良好。

我在这里看到过类似的问题和答案，虽然他们表示将父实体放在孩子体内？在这种情况下不确定是否适用

感谢您的帮助。

Answer 1

尝试

public class Cis 
{
    [Key]
    public int CisId { get; set; }
    [ForeignKey("ProjectId")] //here
    public int ProjectId { get; set; }


    public virtual ICollection<Overhead> Overheads { get; set; }

}

INSERT语句与FOREIGN KEY约束 - 实体框架冲突

1 个答案: