How to map in EF Core 6 a value object with derive classes? - entity-framework-core

Question

I have an Order and an OrderState class, but I will implement state pattern, so I will have a base class State and derived classes for each state.
The classes would be this:
class Order
{
long Id;
Status State;
}
class Status
{
string abstract State;
public abstract void Method1();
}
class Status1 : Status
{
public Status1()
{
State = "Status1";
public ovderride Method1()
{
//do something
}
}
string override State;
}
class Status2 : Status
{
public Status1()
{
State = "Status2";
}
string override State;
public override void Method1()
{
// do something
}
}
In EF Core, I have a class to configure Order with Fluent API:
paramPedidoCompraConfiguracion
.OwnsOne(miOrder => miOrder.State, stateNavigationBuilder =>
{
sateNavigationBuilder.WithOwner();
stateNavigationBuilder.Property<string>(x => x.State)
.HasColumnName("State")
.HasColumnType("varchar(200)")
.IsRequired()
.IsUnicode(false)
.HasMaxLength(200);
});
}
But I get this error:
The corresponding CLR type for entity type 'Status' cannot be instantiated, and there is no derived entity type in the model that corresponds to a concrete CLR type.
I have read the documentation about this in Microsoft docs: https://learn.microsoft.com/en-us/ef/core/modeling/inheritance, in particular in the shared columns, because I want to share the column to avoid to have one column for each state.
This is the code in the documentation:
public class MyContext : DbContext
{
public DbSet<BlogBase> Blogs { get; set; }
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<Blog>()
.Property(b => b.Url)
.HasColumnName("Url");
modelBuilder.Entity<RssBlog>()
.Property(b => b.Url)
.HasColumnName("Url");
}
}
public abstract class BlogBase
{
public int BlogId { get; set; }
}
public class Blog : BlogBase
{
public string Url { get; set; }
}
public class RssBlog : BlogBase
{
public string Url { get; set; }
}
It is defining a dbSet for the base blog, but in my case I am using the state as value object, not as identity, so if I am not wrong, I shouldn't to create a dbSet for values objects, only for entities. So if it is correct, I don't know how to configure my value object with derived classes.
How could I do it?
Thanks.