using System;

using System.Linq;

using System.Reflection;

using Microsoft.EntityFrameworkCore;

using Microsoft.EntityFrameworkCore.Metadata.Builders;

​

​

internal abstract class Document

{

    public DateTime Created { get; init; }

​

    protected void Configure<T>(EntityTypeBuilder<T> builder) where T: Document

    {

        builder.Property(d => d.Created)

            .HasColumnName("created");

    }

}

​

internal sealed class Version : Document, IEntityTypeConfiguration<Version>

{

    public int Id { get; set; }

​

    public void Configure(EntityTypeBuilder<Version> builder)

    {

        base.Configure(builder);

        builder.ToTable("version").HasKey(v => v.Id);

        builder.Property(v => v.Id)

            .HasColumnName("version_id")

            .IsRequired();

    }

}

​

internal sealed class V2 : Document, IEntityTypeConfiguration<V2>

{

    public string Id { get; set; }

​

    public void Configure(EntityTypeBuilder<V2> builder)

    {

        base.Configure(builder);

        builder.ToTable("version").HasKey(v => v.Id);

        builder.Property(v => v.Id)

            .HasColumnName("version_id")

            .IsRequired();

    }

}

​

internal class Context : DbContext

{

    public DbSet<Version> Version { get; init; }

    public DbSet<V2> V2 { get; init; }

​

    protected override void OnConfiguring(DbContextOptionsBuilder builder)

    {

        base.OnConfiguring(builder);

        builder.UseInMemoryDatabase("test");

    }

    protected override void OnModelCreating(ModelBuilder builder)

    {

        base.OnModelCreating(builder);

        builder.ApplyConfigurationsFromAssembly(Assembly.GetExecutingAssembly());

    }

}

​

public class Program

{

    public static void Main()

    {

        var ctx = new Context();

        ctx.Add(new Version() { Id = 1, Created = DateTime.UtcNow });

        ctx.Add(new Version() { Id = 2, Created = DateTime.UtcNow });

        ctx.Add(new V2() { Id = "ajdi", Created = DateTime.UtcNow });

        ctx.Add(new V2() { Id = "tudi", Created = DateTime.UtcNow });

        ctx.SaveChanges();

        ctx.Version.ToList().ForEach(v => Console.WriteLine($"{v.Id}, {v.Created}"));

        ctx.V2.ToList().ForEach(v => Console.WriteLine($"{v.Id}, {v.Created}"));

    }

}

​