Model

Lists

Value objects as complex types

New in EF8

Basic

C# features

Read-only fields

Specify schema

public class Meta
{
    public string Author { get; set; }
    public DateTime PublishedOn { get; set; }
}

public class Article
{
    public int Id { get; set; }
    public string Name { get; set; }

    public required Meta Meta { get; set; }
}

public class AppContext : DbContext
{
    public DbSet<Article> Articles { get; set; }

    // Ensures connection is picked up from AddDbContext
    public AppContext(DbContextOptions<AppContext> options)
        : base(options)
    { }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Article>()
            .ComplexProperty(e => e.Meta)
            .IsRequired()
        ;
    }
}

DbContext

Complex type objects are not identified or tracked by key, and can be shared by multiple properties

Value objects using Complex types