如何在nhibernate queryover中执行此操作

我需要在nhibernate QueryOver中执行此操作：

select distinct sc.* from [Security].[Commands] sc
inner join [Security].[SystemSubjects] ss on ss.Id = sc.Id
left outer join [Security].[SystemSubjectRoles] ssr on ssr.SystemSubjectId = ss.Id
left outer join [Security].[Roles] sr on sr.Id = ssr.RoleId
left outer join [Security].[UserRoles] ur on ur.IdRole = sr.Id 
left outer join [Security].[User] su2 on su2.Id = ur.IdUser
left outer join [Security].SystemSubjectUsers ssu on ssu.SystemSubjectId = ss.Id
left outer join [Security].[User] su on su.Id = ssu.UserId
where (su2.Id = 1 or su.Id = 1)

到目前为止，我已经做到了：

var queryOverRoles = QueryOver.Of<Command>(() => cmdAlias)
            .JoinAlias(() => cmdAlias.SystemSubjectRoles, () => ssRoleAlias, JoinType.LeftOuterJoin)
            .JoinAlias(() => ssRoleAlias.Role, () => roleAlias, JoinType.LeftOuterJoin)
            .JoinAlias(() => roleAlias.Users, () => userAlias, JoinType.LeftOuterJoin)
            .JoinAlias(() => cmdAlias.SystemSubjectUsers, () => ssUserAlias, JoinType.LeftOuterJoin)
            .JoinAlias(() => ssUserAlias.User, () => userAlias2, JoinType.LeftOuterJoin)
            .TransformUsing(Transformers.DistinctRootEntity)
            .Where(() => ssRoleAlias.SecurityPermission == SecurityPermission.Allow)
            .And(() => (userAlias.Id == userId || userAlias2.Id == userId))

它抛出以下异常：

从x源=NHibernate
堆栈跟踪： 在NHibernate.Impl.ExpressionProcessor.FindMemberExpression（表达式 表达）在 d:\CSharp\NH\nhibernate\src\nhibernate\Impl\ExpressionProcessor.cs:line 189 在NHibernate.criteria.QueryOver

2.选择（表达式

1[] 预测）在 d:\CSharp\NH\nhibernate\src\nhibernate\criteria\QueryOver.cs:line 363 位于Novatec.Persistence.Repositories.Implementations.UserRepository.GetAllowedUserCommands（Int32 用户ID）在 C:\Projects\EGrad\Main\Source\Novatec.E-Grad\Source\Novatec.Persistence\Repositories\Implementations\UserRepository.cs:line 140 位于Novatec.Administracija.Services.Security.SecurityManager.AuthorizeUserAction（Int32 用户ID，字符串commandId）在 C:\Projects\EGrad\Main\Source\Novatec.E-Grad\Source\Novatec.Administracija.Services\Security\SecurityManager.cs:line 48 位于Novatec.Framework.Infrastructure.Services.ServiceBase.ExecuteCommand（Int32 userId、字符串appId、ICommand 命令）在 C:\Projects\EGrad\Main\Source\Novatec.E-Grad\Source\Novatec.Framework.Infrastructure\Services\ServiceBase.cs:line 94.例外情况：

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试试这个。。。。您需要指定要选择的别名。 选择（结果=>cmdAlias）

queryOverRole.Select(x=>x);

System.Exception was caught   Message=Could not determine member