public class Customer : BaseEntity
    {
        public string Code { get; set; }

        public string Name { get; set; }

        public int RankId { get; set; }

        //其他属性略

        /// <summary>
        /// 归属人，可以为空
        /// </summary>
        public Login BelongTo { get; set; }

        public int BelongToUserId { get; set; }
    }

    public class Login : BaseEntity, IPrincipal
    {
        public Login()
        {
            Roles = new List<Role>();
        }

        public string UserName { get; set; }

        public string Email { get; set; }

        public string Password { get; set; }

        public bool Enabled { get; set; }

        public virtual User UserInfo { get; set; }

        public virtual ICollection<Role> Roles { get; set; }

        public IIdentity Identity
        {
            get
            {
                var isAuthenticated = Id > 0;
                return new Identity(isAuthenticated, UserName);
            }
        }

        public bool IsInRole(string role)
        {
            return false;
        }

        public virtual Organization Organization { get; set; }

        /// <summary>
        /// 全部权限
        /// </summary>
        public IList<UnitPermission> UnitPermissions
        {
            get
            {
                var permissions = new List<UnitPermission>();
                foreach (var role in Roles.Where(f => f.Enabled))
                {
                    permissions.AddRange(role.UnitPermissions);
                }

                return permissions.Distinct().ToList();
            }
        }
    }

 public class CustomerCinfig : EntityMapperBase<Customer>
    {
        public CustomerCinfig()
        {
            HasKey(f => f.Id);
            Property(f => f.Code).HasMaxLength(20).IsRequired();
            Property(f => f.Name).HasMaxLength(40).IsRequired();
            HasRequired(f => f.Rank).WithMany().HasForeignKey(f => f.RankId).WillCascadeOnDelete(false);
            HasOptional(f => f.BelongTo).WithMany().HasForeignKey(f => f.BelongToUserId);
        }
    }