TPT策略实体框架中的多级继承

Question

假设是这种情况，我想为每个类（包括抽象）创建一个单独的表。

这是DBContext：

type Direction = { [name: string]: number };
const Direction = { ... } as Direction;

实体内容

PersonConfiguration.cs

public class AIOmedicareContext : DbContext
{

    public AIOmedicareContext() : base("name=AIOmedicareConnectionString")
    {

    }

    public DbSet<User> Users { get; set; }

    public DbSet<Role> Roles { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {

        modelBuilder.Entity<Role>()
            .ToTable("Roles")
            .HasKey(p => p.PrimaryKey)
            .Property(p => p.PrimaryKey)
            .HasColumnName("RoleID")
            .HasColumnOrder(1);

        // Moved all Person related configurations to PersonConfiguration class.
        modelBuilder.Configurations.Add(new PersonConfiguration());

        // Moved all User related configurations to UserConfiguration class.
        modelBuilder.Configurations.Add(new UserConfiguration());

        // Moved all Employee related configurations to EmployeeConfiguration class.
        modelBuilder.Configurations.Add(new EmployeeConfiguration());



        base.OnModelCreating(modelBuilder);
    }

}

EmployeeConfiguration.cs

public class PersonConfiguration : EntityTypeConfiguration<Person>
{
    public PersonConfiguration()
    {
        // Database table name
        this.ToTable("Person")
            .HasKey<Guid>(p => p.PrimaryKey);

        // every person have atmost one account.
        this.HasOptional<Account>(s => s.Account);

        // PrimaryKey property mapped to PersonID column in database.
        this.Property(p => p.PrimaryKey)
            .HasColumnName("PersonID")
            .HasColumnOrder(1);

        // a person can have many contacts.
        this.HasMany<Contact>(c => c.Contacts)
            .WithRequired(p => p.Person)
            .HasForeignKey(c => c.PersonID);

        // a person can have many addresses.
        this.HasMany<Address>(p => p.Addresses)
            .WithRequired(a => a.Person)
            .HasForeignKey(a => a.PersonID);
    }
}

UserConfiguration.cs

class EmployeeConfiguration : EntityTypeConfiguration<Employee>
{
    public EmployeeConfiguration()
    {
        this.ToTable("Employees")
            .HasKey(p => p.PrimaryKey)
            .Property(e => e.PrimaryKey)
            .HasColumnName("EmployeeID")
            .HasColumnOrder(1);

        this.HasMany<Role>(u => u.Roles)
            .WithMany(e => e.Employees)
            .Map(re => {
                re.MapLeftKey("EmployeeRefID");
                re.MapRightKey("RoleRefID");
                re.ToTable("EmployeeRole");
            });
    }
}

我正在尝试通过控制台应用程序创建用户的对象，但它会抛出以下异常。

Program.cs的

class UserConfiguration : EntityTypeConfiguration<User>
{
    public UserConfiguration()
    {
        this.ToTable("Users")
            .HasKey(p => p.PrimaryKey)
            .Property(u => u.PrimaryKey)
            .HasColumnName("UserID")
            .HasColumnOrder(1);

        this.HasMany(u => u.UserLogs)
            .WithRequired(ul => ul.User)
            .HasForeignKey(u => u.UserID);

        this.HasMany(u => u.Permissions)
            .WithOptional(p => p.User)
            .HasForeignKey(p => p.UserID);
    }
}

这是错误。

  

从ObjectStateEntry中检索值时出错。有关详细信息，请参阅内部异常。

内在的例外是：

  

（23,10）：错误3032：从第23,34行开始映射片段时出现问题：实体类型AIOmedicare.DAL.EF.Employee，AIOmedicare.DAL.EF.Customer，AIOmedicare.DAL.EF.User正在映射表Person中的相同行。映射条件可用于区分这些类型映射到的行。

迁移已成功应用，并已通过SQL Server Management Studio验证表是否存在。

我错过了什么？