InvalidOperationException：不能将表“xxxx1”用于实体类型“xxxx2”，因为它正在用于实体类型“xxxx1”

Question

我正在尝试先在实体框架代码中创建一个数据库，但我总是收到这样的错误：

InvalidOperationException：无法将表“设备”用于实体类型 'IpMac' 因为它被用于实体类型 'Device' 并且主键 {'DeviceIP'} 和主键 {'DeviceID'} 之间没有关系。”

这些是我的模型类：

public class IpMac
{
    [Key]
    public string DeviceIP { get; set; }
    //[ForeignKey("Device")]
    public int DeviceID { get; set; }
    public string DeviceMAC { get; set; }

    //public Device Device { get; set; }
    public ICollection<Device> Device { get; set; }
}
public class Device
{
    //[Key]
    public int DeviceID { get; set; }
    public string DeviceName { get; set; }
    public string UserName { get; set; }
    //public string DeviceMAC { get; set; }

    public IpMac IpMac { get; set; }
}

这是我的“DbContext”类：

public class DeviceContext : DbContext
{
    public DeviceContext(DbContextOptions<DeviceContext> options) : base (options)
    {
    }

    public DbSet<Device> Devices { get; set; }
    public DbSet<IpMac> IpMacs { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {

        modelBuilder.Entity<IpMac>().ToTable("Device");
        modelBuilder.Entity<Device>().ToTable("Device");
        Logger.Log("DeviceContext: Database & Tables SET.");
    }
}

Answer 1

您的设备上下文是否应该为表使用不同的表名？

public class DeviceContext : DbContext
{
    public DeviceContext(DbContextOptions<DeviceContext> options) : base (options)
    {
    }

    public DbSet<Device> Devices { get; set; }
    public DbSet<IpMac> IpMacs { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
      modelBuilder.Entity<IpMac>().ToTable("IpMac");
      modelBuilder.Entity<Device>().ToTable("Device");
      Logger.Log("DeviceContext: Database & Tables SET.");
    }
}