Question

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，我已经这样做了：

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))

但是这会选择全部（选择），我只想要Command对象（选择sc。）。如果我尝试向查询添加投影，请执行以下操作：

queryOverRole.Select(x=>x);

它抛出了这个异常：

System.Exception was caught   Message=Could not determine member
来自x Source = NHibernate
堆栈跟踪：在NHibernate.Impl.ExpressionProcessor.FindMemberExpression（表达式表达）in d：\ CSHARP \ NH \的nhibernate \ SRC \ NHibernate的\默认地将Impl \ ExpressionProcessor.cs：线 189 在NHibernate.Criterion.QueryOver 2.Select(Expression 1 [] 预测） d：\ CSHARP \ NH \的nhibernate \ SRC \ NHibernate的\判据\ QueryOver.cs：线 363 at Novatec.Persistence.Repositories.Implementations.UserRepository.GetAllowedUserCommands（Int32 userId）in C：\项目\ EGrad \主\源\ Novatec.E-梯度\源\ Novatec.Persistence \库\实现\ UserRepository.cs：线 140 at Novatec.Administracija.Services.Security.SecurityManager.AuthorizeUserAction（Int32 userId，String commandId）in C：\项目\ EGrad \ MAIN \来源\ Novatec.E格勒\来源\ Novatec.Administracija.Services \安全\ SecurityManager.cs：行 48 在Novatec.Framework.Infrastructure.Services.ServiceBase.ExecuteCommand（Int32 userId，String appId，ICommand 命令）in C：\项目\ EGrad \ MAIN \来源\ Novatec.E格勒\来源\ Novatec.Framework.Infrastructure \ SERVICES \ ServiceBase.cs：行 94 InnerException：

Answer 1

试试这个....您需要指定要选择的别名。 queryOverRole.Select（result =＆gt; cmdAlias）;

如何在nhibernate查询中执行此操作

1 个答案: