Change it to:
return (from element in Session.Query<User>()
where element.UserName == userName
select element).SingleOrDefault();
and it will work just fine
On Jan 12, 4:18 am, Thomas Kehl <[email protected]> wrote:
> Hi.
>
> I have now updated to NHibernate 3.0. But there is the first problem
> now. I use the fallowing Linq:
>
> return (from element in Session.Query<User>()
> where element.UserName.Equals(userName,
> StringComparison.CurrentCultureIgnoreCase)
> select element).SingleOrDefault();
>
> This is not working anymore with NHibernate 3. It has worked with 2.1.
>
> Here is the Exception:
>
> Csla.DataPortalException: DataPortal.Fetch fehlgeschlagen (Boolean
> Equals(System.String, System.StringComparison)) --->
> Csla.Reflection.CallMethodException: DataPortal_Fetch Methodenaufruf
> fehlgeschlagen ---> System.NotSupportedException: Boolean
> Equals(System.String, System.StringComparison)
> bei
> NHibernate.Linq.Visitors.HqlGeneratorExpressionTreeVisitor.VisitMethodCallExpression(MethodCallExpression
> expression) in d:\CSharp\NH\nhibernate\src\NHibernate\Linq\Visitors
> \HqlGeneratorExpressionTreeVisitor.cs:Zeile 396.
> bei
> NHibernate.Linq.Visitors.HqlGeneratorExpressionTreeVisitor.VisitExpression(Expression
> expression) in d:\CSharp\NH\nhibernate\src\NHibernate\Linq\Visitors
> \HqlGeneratorExpressionTreeVisitor.cs:Zeile 92.
> bei
> NHibernate.Linq.Visitors.HqlGeneratorExpressionTreeVisitor.Visit(Expression
> expression, VisitorParameters parameters) in d:\CSharp\NH\nhibernate
> \src\NHibernate\Linq\Visitors
> \HqlGeneratorExpressionTreeVisitor.cs:Zeile 21.
> bei
> NHibernate.Linq.Visitors.QueryModelVisitor.VisitWhereClause(WhereClause
> whereClause, QueryModel queryModel, Int32 index) in d:\CSharp\NH
> \nhibernate\src\NHibernate\Linq\Visitors\QueryModelVisitor.cs:Zeile
> 156.
> bei
> Remotion.Data.Linq.Clauses.WhereClause.Accept(IQueryModelVisitor
> visitor, QueryModel queryModel, Int32 index)
> bei
> Remotion.Data.Linq.QueryModelVisitorBase.VisitBodyClauses(ObservableCollection`1
> bodyClauses, QueryModel queryModel)
> bei
> Remotion.Data.Linq.QueryModelVisitorBase.VisitQueryModel(QueryModel
> queryModel)
> bei
> NHibernate.Linq.Visitors.QueryModelVisitor.GenerateHqlQuery(QueryModel
> queryModel, VisitorParameters parameters, Boolean root) in d:\CSharp\NH
> \nhibernate\src\NHibernate\Linq\Visitors\QueryModelVisitor.cs:Zeile
> 49.
> bei
> NHibernate.Linq.NhLinqExpression.Translate(ISessionFactoryImplementor
> sessionFactory) in d:\CSharp\NH\nhibernate\src\NHibernate\Linq
> \NhLinqExpression.cs:Zeile 67.
> bei
> NHibernate.Hql.Ast.ANTLR.ASTQueryTranslatorFactory.CreateQueryTranslators(String
> queryIdentifier, IQueryExpression queryExpression, String
> collectionRole, Boolean shallow, IDictionary`2 filters,
> ISessionFactoryImplementor factory) in d:\CSharp\NH\nhibernate\src
> \NHibernate\Hql\Ast\ANTLR\ASTQueryTranslatorFactory.cs:Zeile 27.
> bei
> NHibernate.Engine.Query.HQLExpressionQueryPlan.CreateTranslators(String
> expressionStr, IQueryExpression queryExpression, String
> collectionRole, Boolean shallow, IDictionary`2 enabledFilters,
> ISessionFactoryImplementor factory) in d:\CSharp\NH\nhibernate\src
> \NHibernate\Engine\Query\HQLExpressionQueryPlan.cs:Zeile 34.
> bei NHibernate.Engine.Query.HQLExpressionQueryPlan..ctor(String
> expressionStr, IQueryExpression queryExpression, String
> collectionRole, Boolean shallow, IDictionary`2 enabledFilters,
> ISessionFactoryImplementor factory) in d:\CSharp\NH\nhibernate\src
> \NHibernate\Engine\Query\HQLExpressionQueryPlan.cs:Zeile 23.
> bei
> NHibernate.Engine.Query.QueryPlanCache.GetHQLQueryPlan(IQueryExpression
> queryExpression, Boolean shallow, IDictionary`2 enabledFilters) in d:
> \CSharp\NH\nhibernate\src\NHibernate\Engine\Query
> \QueryPlanCache.cs:Zeile 88.
> bei
> NHibernate.Impl.AbstractSessionImpl.GetHQLQueryPlan(IQueryExpression
> queryExpression, Boolean shallow) in d:\CSharp\NH\nhibernate\src
> \NHibernate\Impl\AbstractSessionImpl.cs:Zeile 302.
> bei
> NHibernate.Impl.AbstractSessionImpl.CreateQuery(IQueryExpression
> queryExpression) in d:\CSharp\NH\nhibernate\src\NHibernate\Impl
> \AbstractSessionImpl.cs:Zeile 258.
> bei NHibernate.Linq.NhQueryProvider.PrepareQuery(Expression
> expression, IQuery& query, NhLinqExpression& nhQuery) in d:\CSharp\NH
> \nhibernate\src\NHibernate\Linq\NhQueryProvider.cs:Zeile 42.
> bei NHibernate.Linq.NhQueryProvider.Execute(Expression expression)
> in d:\CSharp\NH\nhibernate\src\NHibernate\Linq
> \NhQueryProvider.cs:Zeile 22.
> bei NHibernate.Linq.NhQueryProvider.Execute[TResult](Expression
> expression) in d:\CSharp\NH\nhibernate\src\NHibernate\Linq
> \NhQueryProvider.cs:Zeile 101.
> bei System.Linq.Queryable.SingleOrDefault[TSource](IQueryable`1
> source)
>
> Can someone help me, whats going wrong? - Thank you very much.
>
> Best Regards, Thomas
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