Организация объекта 6 - Столбец дискриминатора снята по умолчанию для наследственного абстрактного класса - Ошибка 3032: ⇐ C#

[Anonymous]

Ошибка: < /p>

error 3032: Problem in mapping fragments starting at line: Condition member '' with a condition other than 'IsNull=False' is mapped. Either remove the condition on or remove it from the mapping.
< /code>

code: < /p>

public enum MyEnum
{
Value1, Value2
}

public class MyBaseClass
{
public MyEnum MyEnum { get; protected set; }
}

public class DerivedOne: MyBaseClass
{
public DerivedOne()
{
MyEnum = MyEnum.Value1;
}

public string MyDerivedOneString { get; set; }
}

public class DerivedTwo: MyBaseClass
{
public DerivedTwo()
{
MyEnum = MyEnum.Value2;
}
}

public class MyDbContext : DbContext
{
DbSet MyBaseClass { get; set; }

DbSet DerivedOne { get; set; }

DbSet DerivedTwo { get; set; }

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);

modelBuilder.Entity()
.Map(x => x.Requires("MyEnum").HasValue((int)MyEnum.Value1))
.Map(x => x.Requires("MyEnum").HasValue((int)MyEnum.Value2));
}
}

static void Main(string[] args)
{
var db = new MyDbContext();

var derivedOne = new DerivedOne();

derivedOne.MyDerivedOneString = "test";

db.DerivedOne.Add(derivedOne);
//Exception
db.SaveChanges();
}


Подробнее здесь: https://stackoverflow.com/questions/448 ... d-abstract