Closed
Description
Execute this query gives the following exception:
public class Company
{
public int Id { get; set; }
public string Description { get; set; }
}
public class CompanyDto
{
public int Id { get; set; }
public string Description { get; set; }
}
var query = session.Query<Company>()
.Select(x =>
new CompanyDto()
{
Id = x.Id,
Description = x.Description,
})
.GroupBy(x => x.Id)
.Select(x =>
new CompanyDto()
{
Id = x.Key,
Description = x.Max(y => y.Description),
});
query.ToList()The method or operation is not implemented
[StackTrace]
in NHibernate.Linq.GroupBy.GroupBySelectClauseRewriter.VisitMember(MemberExpression expression)
in NHibernate.Linq.Expressions.NhAggregatedExpression.VisitChildren(ExpressionVisitor visitor)
in NHibernate.Linq.Expressions.NhExpression.Accept(ExpressionVisitor visitor)
in NHibernate.Linq.GroupBy.GroupBySelectClauseRewriter.ReWrite(Expression expression, GroupResultOperator groupBy, QueryModel model)
in NHibernate.Linq.GroupBy.GroupBySelectClauseRewriter.VisitSubQuery(SubQueryExpression expression)
in System.Linq.Expressions.ExpressionVisitor.VisitMemberAssignment(MemberAssignment node)
in System.Linq.Expressions.ExpressionVisitor.Visit[T](ReadOnlyCollection`1 nodes, Func`2 elementVisitor)
in System.Linq.Expressions.ExpressionVisitor.VisitMemberInit(MemberInitExpression node)
in NHibernate.Linq.GroupBy.GroupBySelectClauseRewriter.ReWrite(Expression expression, GroupResultOperator groupBy, QueryModel model)
in NHibernate.Linq.GroupBy.AggregatingGroupByRewriter.<>c__DisplayClass2_0.<FlattenSubQuery>b__0(Expression s)
in Remotion.Linq.Clauses.SelectClause.TransformExpressions(Func`2 transformation)
in NHibernate.Linq.GroupBy.AggregatingGroupByRewriter.FlattenSubQuery(QueryModel queryModel, QueryModel subQueryModel, GroupResultOperator groupBy)
in NHibernate.Linq.GroupBy.AggregatingGroupByRewriter.ReWrite(QueryModel queryModel)
in NHibernate.Linq.Visitors.QueryModelVisitor.GenerateHqlQuery(QueryModel queryModel, VisitorParameters parameters, Boolean root, Nullable`1 rootReturnType)
in NHibernate.Linq.NhLinqExpression.Translate(ISessionFactoryImplementor sessionFactory, Boolean filter)
in NHibernate.Hql.Ast.ANTLR.ASTQueryTranslatorFactory.CreateQueryTranslators(IQueryExpression queryExpression, String collectionRole, Boolean shallow, IDictionary`2 filters, ISessionFactoryImplementor factory)
in NHibernate.Engine.Query.QueryExpressionPlan.CreateTranslators(IQueryExpression queryExpression, String collectionRole, Boolean shallow, IDictionary`2 enabledFilters, ISessionFactoryImplementor factory)
in NHibernate.Engine.Query.QueryExpressionPlan..ctor(IQueryExpression queryExpression, Boolean shallow, IDictionary`2 enabledFilters, ISessionFactoryImplementor factory)
in NHibernate.Engine.Query.QueryPlanCache.GetHQLQueryPlan(IQueryExpression queryExpression, Boolean shallow, IDictionary`2 enabledFilters)
in NHibernate.Impl.AbstractSessionImpl.GetHQLQueryPlan(IQueryExpression queryExpression, Boolean shallow)
in NHibernate.Impl.AbstractSessionImpl.CreateQuery(IQueryExpression queryExpression)
in NHibernate.Linq.DefaultQueryProvider.PrepareQuery(Expression expression, IQuery& query)
in NHibernate.Linq.DefaultQueryProvider.Execute(Expression expression)
in NHibernate.Linq.DefaultQueryProvider.Execute[TResult](Expression expression)
in Remotion.Linq.QueryableBase`1.GetEnumerator()
in System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
in System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)