abstract="true" in mapping?

hppt · **Posted:** Fri Oct 03, 2008 6:03 am

Hi,

Does anyone know what is wrong with this mapping as NHibernate is complaining about invalid XML because the "abstract" attribute is not definded/declared:

Code:

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
  <class name="HPPTCMS.LOGIC.Classes.Article, HPPTCMS.LOGIC" table="HPPTCMS_Article" lazy="true" abstract="true">

    <id name="ID" column="id" type="Int64">
      <generator class="native" />
    </id>

    <discriminator column="articlediscriminatorid" type="String"/>

    <subclass name="HPPTCMS.LOGIC.Classes.ProjectItem, HPPTCMS.LOGIC" discriminator-value="20">
    </subclass>
    <subclass name="HPPTCMS.LOGIC.Classes.BlogItem, HPPTCMS.LOGIC" discriminator-value="30">
    </subclass>

etc etc.


  </class>
</hibernate-mapping>

Thanks!
Bouwe

wolli · **Posted:** Fri Oct 03, 2008 6:53 am

Which version do you use ? I think that attribute was introduced with NH 2.0.

hppt · **Posted:** Fri Oct 03, 2008 8:00 am

Oops, yes that would make sense... :)

I used 1.2 and now upgraded to 2.0, which causes some other problems, which I will post on a new subject... :|

Thanks!

hppt · **Posted:** Fri Oct 03, 2008 9:16 am

After upgrading to NHibernate 2.0 and fixing some issues, I'm getting an SystemOutOfRangeException because System.Collections.ListDictionaryInternal is empty and it propably wants to find something in this list?

I don't what this ListDictionaryInternal is and what is wrong with my mapping file... :(

I assume it still has something to do with the fact i want to use an abstract class with subclasses and a dsicriminator.

This is my mapping file:

Code:

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
  <class name="HPPTCMS.LOGIC.Classes.Article, HPPTCMS.LOGIC" table="HPPTCMS_Article" lazy="true" abstract="true">

    <id name="ID" column="id" type="Int64">
      <generator class="native" />
    </id>

    <discriminator column="articlediscriminatorid" type="String"/>

    <property name="Title" column="title" type="String" length="255"/>

    <subclass name="HPPTCMS.LOGIC.Classes.ProjectItem, HPPTCMS.LOGIC" discriminator-value="20">
      <property name="Excerpt" column="excerpt" type="String" length="255"/>
    </subclass>
    <subclass name="HPPTCMS.LOGIC.Classes.BlogItem, HPPTCMS.LOGIC" discriminator-value="30">
      <property name="Body" column="body" type="String" length="255"/>
    </subclass>

  </class>
</hibernate-mapping>

This is the stack trace:

Code:

   bij System.Collections.ArrayList.get_Item(Int32 index)
   bij NHibernate.SqlCommand.InFragment.ToFragmentString()
   bij NHibernate.Persister.Entity.SingleTableEntityPersister.DiscriminatorFilterFragment(String alias)
   bij NHibernate.Persister.Entity.SingleTableEntityPersister.FilterFragment(String alias)
   bij NHibernate.Persister.Entity.AbstractEntityPersister.FilterFragment(String alias, IDictionary`2 enabledFilters)
   bij NHibernate.Loader.Entity.EntityJoinWalker..ctor(IOuterJoinLoadable persister, String[] uniqueKey, Int32 batchSize, LockMode lockMode, ISessionFactoryImplementor factory, IDictionary`2 enabledFilters)
   bij NHibernate.Loader.Entity.EntityLoader..ctor(IOuterJoinLoadable persister, String[] uniqueKey, IType uniqueKeyType, Int32 batchSize, LockMode lockMode, ISessionFactoryImplementor factory, IDictionary`2 enabledFilters)
   bij NHibernate.Loader.Entity.EntityLoader..ctor(IOuterJoinLoadable persister, Int32 batchSize, LockMode lockMode, ISessionFactoryImplementor factory, IDictionary`2 enabledFilters)
   bij NHibernate.Loader.Entity.EntityLoader..ctor(IOuterJoinLoadable persister, LockMode lockMode, ISessionFactoryImplementor factory, IDictionary`2 enabledFilters)
   bij NHibernate.Loader.Entity.BatchingEntityLoader.CreateBatchingEntityLoader(IOuterJoinLoadable persister, Int32 maxBatchSize, LockMode lockMode, ISessionFactoryImplementor factory, IDictionary`2 enabledFilters)
   bij NHibernate.Persister.Entity.AbstractEntityPersister.CreateEntityLoader(LockMode lockMode, IDictionary`2 enabledFilters)
   bij NHibernate.Persister.Entity.AbstractEntityPersister.CreateEntityLoader(LockMode lockMode)
   bij NHibernate.Persister.Entity.AbstractEntityPersister.CreateLoaders()
   bij NHibernate.Persister.Entity.AbstractEntityPersister.PostInstantiate()
   bij NHibernate.Persister.Entity.SingleTableEntityPersister.PostInstantiate()
   bij NHibernate.Impl.SessionFactoryImpl..ctor(Configuration cfg, IMapping mapping, Settings settings, EventListeners listeners)
   bij NHibernate.Cfg.Configuration.BuildSessionFactory()
   bij HPPTCMS.DATA.DAO.NHibernateSessionManager.InitSessionFactory() in C:\Mijn Projecten\HPPTCMS\HPPTCMSPortals\HPPTCMS\HPPTCMS.DATA\DAO\NHibernateSessionManager.cs:regel 53
   bij HPPTCMS.DATA.DAO.NHibernateSessionManager..ctor() in C:\Mijn Projecten\HPPTCMS\HPPTCMSPortals\HPPTCMS\HPPTCMS.DATA\DAO\NHibernateSessionManager.cs:regel 36
   bij HPPTCMS.DATA.DAO.NHibernateSessionManager.Nested..cctor() in C:\Mijn Projecten\HPPTCMS\HPPTCMSPortals\HPPTCMS\HPPTCMS.DATA\DAO\NHibernateSessionManager.cs:regel 45

CygnusX1 · **Joined:** Tue Dec 30, 2008 4:53 pm **Posts:** 2

I'am having the same problem with nhibernate v 2.0.1.4000
here is my mapping file

Code:

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
                   assembly="FGalaxy" namespace="FGalaxy">
  <class name="SectorObject" table="SectorObject" discriminator-value="0">
    <id name="ID" column="ObjectId">
      <generator class="guid"/>
    </id>
    <discriminator column="ObjectType" type="System.Int32"/>
    <property name="Name"/>
    <property name="Speed"/>
    <component name="Coords">
      <component name="Galactic">
        <property name="gX" column="glX"/>
        <property name="gY" column="glY"/>
        <property name="gZ" column="glZ"/>
      </component>
    </component>
    <component name="dCoords">
      <component name="Galactic">
        <property name="gX" column="dglX"/>
        <property name="gY" column="dglY"/>
        <property name="gZ" column="dglZ"/>
      </component>
    </component>
    <component name="SystemID">
      <property name="ID" column="SystemId"/>
    </component>
    <subclass name="SystemObject" extends="SectorObject" discriminator-value="1">
      <subclass name="SystemBodyObject" extends="SystemObject" discriminator-value="2">
        <property name="SystemBodyID" column="SystemBodyId"/>
      </subclass>
    </subclass>
  </class>
</hibernate-mapping>

And I'am Getting this exception....

Code:

System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
   at System.Collections.ArrayList.get_Item(Int32 index)
   at NHibernate.SqlCommand.InFragment.ToFragmentString()
   at NHibernate.Persister.Entity.SingleTableEntityPersister.DiscriminatorFilter
Fragment(String alias)
   at NHibernate.Persister.Entity.SingleTableEntityPersister.FilterFragment(Stri
ng alias)
   at NHibernate.Persister.Entity.AbstractEntityPersister.FilterFragment(String
alias, IDictionary`2 enabledFilters)
(...)

Need help!

wolli · **Posted:** Wed Dec 31, 2008 3:15 am

When do you get the exception ? Can you post the code ?

CygnusX1 · **Joined:** Tue Dec 30, 2008 4:53 pm **Posts:** 2

Well i solved the problem. It isn't a real problem but its a bug or a miss feature ^^.

I was trying to migrate some old code to nHibernate in this project and the 2 subclasses SystemObject And SystemBodyObject where abstract classes...

I've change my code so the classes aren't abstract anymore and everything is ok now.

The problem is that nHibernate should log and report the problem with the config file.

I've changed other things in the project while trying to make it work so i will make a "test case" for this in the weekend and post it to Jira since i've opened a bug report there.

Thanks

Pedro