[nhibernate-issues] [NHJIRA] Resolved: (NH-2662) Casting a joined alias in QueryOver loses alias context and looks for property on QueryOver root

[Richard B. (JIRA) <nh...@gm...>]

     [ http://216.121.112.228/browse/NH-2662?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Richard Brown resolved NH-2662.
-------------------------------

       Resolution: Fixed
    Fix Version/s: 3.2.0Beta2

Fixed.  Thanks for the test case.

> Casting a joined alias in QueryOver loses alias context and looks for property on QueryOver root
> ------------------------------------------------------------------------------------------------
>
>                 Key: NH-2662
>                 URL: http://216.121.112.228/browse/NH-2662
>             Project:  NHibernate
>          Issue Type: Bug
>          Components: QueryOver
>    Affects Versions: 3.2.0Alpha2
>            Reporter: Graeme Foster
>            Assignee: Richard Brown
>            Priority: Major
>             Fix For: 3.2.0Beta2
>
>         Attachments: NH2662.zip
>
>
> If you QueryOver an entity, alias-join to a property on that entity which has an inheritance tree, and then attempt to project a property on a specific subclass of the entity, the property path loses the context of the alias and attempts to find it on the queryover root.
> Pseudo code:
> QueryOver<Customer>()
> .JoinAlias(c => c.Order, () => orderAlias)
> .SelectList(list => list.Select( () => ((SpecialOrder)orderAlias).SpecialReason);
> blows up.
> The equivalent in linq-nhibernate works OK which is why I think this is a bug.
> Query<Customer>().Select( c => new { SpecialReason = ((SpecialOrder)c.Order).SpecialReason } );
> Will attach issue zip in same format as NH Trunk issues.
> Graeme

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