Question

我正在分配两个对象之间的关系，但我在映射时遇到错误。

我有以下对象：

public abstract class EntityBase : IEntity
{
    public int Id { get; set; }
}

public class ManagerUser : EntityBase
{
    public string UserCode { get; set; }
    public string Title { get; set; }
    public virtual Staff StaffDetails { get; set; }
}

public class Staff : EntityBase
{
    public string UserCode { get; set; }
    public string DOB { get; set; }
}

public class ManagerUserMap : EntityMapBase<ManagerUser>
{
    protected override void SetupMappings()
    {
        base.SetupMappings();
        //this.HasKey(t => t.UserCode);
        this.ToTable("ManagerUsers");
        this.Property(t => t.Id).HasColumnName("ManagerUsersID")
        .HasDatabaseGeneratedOption(System.ComponentModel.DataAnnotations.Schema.DatabaseGeneratedOption.Identity);
        this.Property(t => t.Title).HasColumnName("txtTitle");
        this.HasRequired(x => x.StaffDetails)
            .WithMany()
            .HasForeignKey(x => x.UserCode);
    }
}

public class StaffMap : EntityMapBase<Staff>
{
    protected override void SetupMappings()
    {
        base.SetupMappings();
        //this.HasKey(t => t.UserCode);
        this.ToTable("TblStaff");
        this.Property(t => t.Id).HasColumnName("StaffID")
        .HasDatabaseGeneratedOption(System.ComponentModel.DataAnnotations.Schema.DatabaseGeneratedOption.Identity);
        this.Property(t => t.UserCode).HasColumnName("User_Code");
        this.Property(t => t.DateOfBirth).HasColumnName("dob");
    }
}

我收到以下错误：

财产的类型＆＃39; UserCode＆＃39;实体＆＃39; ManagerUser＆＃39;不匹配财产的类型＆＃39; Id＆＃39;实体＆＃39;员工＆＃39;在参考约束＆＃39; ManagerUser_StaffDetails＆＃39;

我一直在搜索并找不到解决办法让它将ManagerUser中的外键与UserCode中的Staff属性进行比较而不是ID属性。

Answer 1

您的密钥在流畅的配置中有点混乱，HasKey设置实体的主键。下面我已将主键设置为两个实体的Id。然后将用户代码用作FK：

    public class ManagerUserMap : EntityMapBase<ManagerUser>
    {
        protected override void SetupMappings()
        {
            base.SetupMappings();
            this.HasKey(t => t.Id);
            this.ToTable("ManagerUsers");
            this.Property(t => t.Id).HasColumnName("ManagerUsersID")
            .HasDatabaseGeneratedOption(System.ComponentModel.DataAnnotations.Schema.DatabaseGeneratedOption.Identity);
            this.Property(t => t.Title).HasColumnName("txtTitle");
            this.HasRequired(x => x.StaffDetails)
                .WithMany()
                .HasForeignKey(x => x.UserCode);
        }
    }

    public class StaffMap : EntityMapBase<Staff>
    {
        protected override void SetupMappings()
        {
            base.SetupMappings();
            this.HasKey(t => t.Id);
            this.ToTable("TblStaff");
            this.Property(t => t.Id).HasColumnName("StaffID")
            .HasDatabaseGeneratedOption(System.ComponentModel.DataAnnotations.Schema.DatabaseGeneratedOption.Identity);
            this.Property(t => t.UserCode).HasColumnName("User_Code");
            this.Property(t => t.DateOfBirth).HasColumnName("dob");
        }
    }

一对一关系实体框架外键映射

1 个答案: