[nhibernate-issues] [JIRA] Closed: (NH-779) abstract class not recognized using multiple mapping files

[NHibernate J. <mik...@us...>]

     [ http://jira.nhibernate.org/browse/NH-779?page=all ]
     
Sergey Koshcheyev closed NH-779:
--------------------------------

    Fix Version:     (was: 1.2.0.Beta2)
     Resolution: Fixed

Seems to work for me using the SVN version, so I'm assuming it was fixed some time ago.

> abstract class not recognized using multiple mapping files
> ----------------------------------------------------------
>
>          Key: NH-779
>          URL: http://jira.nhibernate.org/browse/NH-779
>      Project: NHibernate
>         Type: Bug
>   Components: Core
>     Versions: 1.0.2
>     Reporter: Hace
>  Attachments: JoinedSubClass.zip
>
> When an abstract class and (one or more) joined-subclasses are not in one mapping file, but joined-subclasses are in separate mappingfiles, the connection between the abstract class and the joined subclasses is lost. An error of 'cannot instantiate abstract class' occurs.
> [ AbstractClass.hbm.xml ]
> <hibernate-mapping>
>   <class name="Namespace.Common.AbstractClass, Namespace.Common" table="GeneralItem">
>     <id name="GeneralItemId"  type="Int32" column="GeneralItemId" >
>       <generator class="identity"/>
>     </id>
>     <property name="GeneralText" column="GeneralText" />
>     
>     <joined-subclass name="Namespace.Common.A.ConcreteClassA, Namespace.Common.A" table="ItemsA" extends="Namespace.Common.AbstractClass, Namespace.Common">
>       <key column="GeneralItemId" />
>       ..concrete properties for A..
>     </joined-subclass>
>   
>   </class>
> </hibernate-mapping>
> [ ConcreteClassB.hbm.xml ]
> <hibernate-mapping>
>   <joined-subclass name="Namespace.Common.B.ConcreteClassB, Namespace.Common.B" table="ItemsB" extends="Namespace.Common.AbstractClass, Namespace.Common">
>       <key column="GeneralItemId" />
>       ..concrete properties for B..
>     </joined-subclass>
> </hibernate-mapping>
> Items for ConcreteClassB will not be loaded correctly, only because the joined-subclass is not in the SAME mappingfile as ConcreteClassA ?
> [ Code ]
> List<AbstractClass> itemList = new List<AbstractClass>();
>    ISession session = OurSession.CurrentSession;
>    ICriteria NHibernateCriteria = session.CreateCriteria(typeof(AbstractClass));
>    NHibernateCriteria.Add(Expression.In("GeneralItemId", generalItemIds.ToArray()));
>    try
>    {
>      IEnumerable<AbstractClass> enumerable = (AbstractClass[])ArrayList.Adapter(NHibernateCriteria.List()).ToArray(typeof(AbstractClass));
>      itemList = new List<AbstractClass>(enumerable);
>    }
>    catch(Exception exception)
>    {
>       ... log exception..
>    }
> ......
>   dostuff
>   foreach(ConcreteClassA in itemList)
>  .... 
> [ /code ]

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