问实体框架4.3.1获取数据时代码优先关系不起作用

EN

public class EFDbContext : DbContext
{
    public EFDbContext()
        : base("ApplicationServices")
    {
    }

    public DbSet<Tournament> tournaments { get; set; }
    public DbSet<Address> addresses { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
    }

    public class Tournament
    {
        [ScaffoldColumn(false)]
        public int TournamentId { get; set; }


        [Required(ErrorMessage="Tournament name is a required field")]
        public string Name { get; set; }


        [Required(ErrorMessage="Address is a required field")]
        public Address Address { get; set; }
    }

    public class Address
    {   
        [ScaffoldColumn(false)]
        public int AddressId { get; set; }


        [Required(ErrorMessage="Street name is a required field")]
        public string Street { get; set; }


        [Required(ErrorMessage="House number is a required field")]
        public string HouseNo { get; set; }
    }
}

Tournament tournament = context.tournaments.Find(id);