//更新
        public int Update(string id, bas_tenant tenant)
        {
            var result = _db.Update("bas_tenant", tenant)
                .AutoMap(x => x.tenant_id)
                .Where("tenant_id", id)
                .Execute();

            return result;
        }
        //添加
        public string Insert(bas_tenant tenant)
        {
            tenant.tenant_id = "T" + (new Random().Next(100) + 500).ToString();

            var result = _db.Insert("bas_tenant", tenant)
                .AutoMap()
                .Execute();

            return tenant.tenant_id;
        }