一對一關系Entity Framework外鍵映射

Question

我正在分配兩個對象之間的關系，但在映射上遇到錯誤。

我有以下對象：

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");
    }
}

我收到以下錯誤：

實體'ManagerUser'上屬性'UserCode'的類型與引用約束'ManagerUser_StaffDetails'中實體'Staff'上屬性'Id'的類型不匹配

我四處搜尋，但未能找到解決方案，無法將ManagerUser的外鍵與Staff的UserCode屬性（而不是ID屬性）進行比較。

Answer 1

您的鍵在流暢的配置中有些混亂，HasKey設置實體的主鍵。 下面，我將兩個實體的主鍵設置為ID。 然后將用戶代碼用作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");
        }
    }