Question

我在使用Entity Framework的ASP网络CORE MVC网站上工作，我在两个表之间有双重关系：

的DocType
#DocTypeName
#DocTypeValidationText

TraductionInterface
+ ID

DocTypeName和DocTypeValidationText是 TraductionInterface 表的ForeignKey：一个 DocType 有2个 TraductionInterface

这是我的班级：

DocType.cs

 public class DocType
{
    [Key]
    public int DocTypeID { get; set; }

    [Required]
    public int DocTypeName { get; set; }
    [ForeignKey("DocTypeName")]
    public virtual TraductionInterface TraductionInterfaceName { get; set; }

    [Required]
    public int DocTypeValidationText { get; set; }
    [ForeignKey("DocTypeValidationText")]
    public virtual TraductionInterface TraductionInterfacevalidationText { get; set; }
}

TraductionInterface.cs

public class TraductionInterface
    {
        [Key]
        public int TraductionInterfaceID;

        [ForeignKey("DocTypeName")]
        public virtual DocType DocTypeName { get; set; }

        [ForeignKey("DocTypeValidationText")]
        public virtual DocType DocTypeValidationText { get; set; }

     }

ApplicationDbContext.cs

builder.Entity<DocType>().ToTable("DocType").HasOne(d => d.TraductionInterfaceName).WithOne(t => t.DocTypeName);
            builder.Entity<DocType>().HasOne(d => d.TraductionInterfacevalidationText).WithOne(t => t.DocTypeValidationText);

但是当我尝试更新

时出现此错误

无法在实体类型“TraductionInterface”上为属性“DocTypeValidationText”调用Property，因为它已配置为导航属性。属性只能用于配置标量属性。

修改
@ user1672994的解决方案似乎解决了问题，但只应用了第一个关系：
如果
builder.Entity<DocType>().ToTable("DocType").HasOne(d => d.TraductionInterfaceName).WithOne(t => t.DocTypeName);
是在之前 builder.Entity<DocType>().HasOne(d => d.TraductionInterfacevalidationText).WithOne(t => t.DocTypeValidationText);
TraductionInterfaceName关系适用，否则为TraductionInterfacevalidationText关系。我怎样才能使这两个关系一起工作？

Answer 1

错误本身表明您应该定义标量属性并定义ForeignKey关系。下面的代码定义了关系属性，并在附加ForeignKey关系

时使用它

public class TraductionInterface
{
    [Key]
    public int TraductionInterfaceID {get; set; }

    public int DocTypeNameId {get; set; }

    [ForeignKey("DocTypeNameId")]
    public virtual DocType DocTypeName { get; set; }

    public int DocTypeValidationTextId {get; set; }

    [ForeignKey("DocTypeValidationTextId")]
    public virtual DocType DocTypeValidationText { get; set; }

 }

实体框架表之间的双重关系

1 个答案: