session.Linq<User>().ToList().Select(u => Convert(u));
2009/9/11 Brett Carswell <brett.carsw...@gmail.com>
>
> Hi All,
>
> I've added the code below to SelectionTests.cs in
> NHibernate.Linq.Tests. I would expect this to work but instead get the
> exception below. I would expect this to work. Is there an issue with
> the Linq provider or am I misusing it. I'm sure I have done a similar
> thing in the past with Linq to SQL.
>
> TIA,
> Brett
> private static UserDto Convert(User user)
> {
> return new UserDto(user.Id, user.Name);
> }
>
> [Test]
> public void CanSelectUsingMethod()
> {
> var query = session.Linq<User>().Select(u => Convert(u));
>
> var list = query.ToList();
> Assert.AreEqual(3, list.Count);
> }
>
> System.InvalidCastException: Unable to cast object of type
> 'NHibernate.Linq.Expressions.EntityExpression' to type
> 'NHibernate.Linq.Expressions.CollectionAccessExpression'.
> at NHibernate.Linq.Visitors.SelectArgumentsVisitor.VisitMethodCall
> (MethodCallExpression expr) in SelectArgumentsVisitor.cs: line 97
> at NHibernate.Linq.Visitors.ExpressionVisitor.Visit(Expression exp) in
> ExpressionVisitor.cs: line 70
> at NHibernate.Linq.Visitors.NHibernateExpressionVisitor.Visit
> (Expression exp) in NHibernateExpressionVisitor.cs: line 29
> at NHibernate.Linq.Visitors.RootVisitor.HandleSelectCall
> (MethodCallExpression call) in RootVisitor.cs: line 114
> at NHibernate.Linq.Visitors.RootVisitor.VisitMethodCall
> (MethodCallExpression expr) in RootVisitor.cs: line 50
> at NHibernate.Linq.Visitors.ExpressionVisitor.Visit(Expression exp) in
> ExpressionVisitor.cs: line 70
> at NHibernate.Linq.Visitors.NHibernateExpressionVisitor.Visit
> (Expression exp) in NHibernateExpressionVisitor.cs: line 29
> at NHibernate.Linq.Visitors.NHibernateQueryTranslator.Translate
> (Expression expression, QueryOptions queryOptions) in
> NHibernateQueryTranslator.cs: line 40
> at NHibernate.Linq.NHibernateQueryProvider.TranslateExpression
> (Expression expression) in NHibernateQueryProvider.cs: line 49
> at NHibernate.Linq.NHibernateQueryProvider.Execute(Expression
> expression) in NHibernateQueryProvider.cs: line 54
> at NHibernate.Linq.Query`1.GetEnumerator() in Query.cs: line 69
> at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
> at System.Linq.Enumerable.ToList<TSource>(IEnumerable`1 source)
> at NHibernate.Linq.Tests.SelectionTests.CanSelectUsingMethod() in
> SelectionTests.cs: line 70
>
>
>
>
> >
>
--
Fabio Maulo
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