Wie kann ich diese NHibernate.PropertyAccessException diagnostizieren / beheben?

Question

In Anbetracht der folgenden Fluent NHibernate Karten:

public class FastTrackPackageClassMap : ClassMap<FastTrackPackage>
{
    public FastTrackPackageClassMap()
    {
        Id(x => x.Id);
        References(x => x.UserCreated, "UserIdCreated").Cascade.None();
        References(x => x.UserSent, "UserIdSent").Nullable().Cascade.None();
        HasMany(x => x.GetFileHeaders()).KeyColumn("PackageId").ForeignKeyConstraintName("PackageId").Cascade.AllDeleteOrphan().Not.LazyLoad().Inverse();
        HasMany(x => x.GetEmailRecords()).KeyColumn("PackageId").ForeignKeyConstraintName("PackageId").Cascade.AllDeleteOrphan().Not.LazyLoad().Inverse();
        HasMany(x => x.GetPaymentRecords()).KeyColumn("PackageId").ForeignKeyConstraintName("PackageId").Cascade.AllDeleteOrphan().Not.LazyLoad().Inverse();
        HasMany(x => x.GetFileTrailers()).KeyColumn("PackageId").ForeignKeyConstraintName("PackageId").Cascade.AllDeleteOrphan().Not.LazyLoad().Inverse();
        Map(x => x.TestPackage);
        Map(x => x.DateTimeCreated).Generated.Insert();
        Map(x => x.DateTimeSent).Nullable();
    }
}

public class FileHeaderFastTrackRecordClassMap : ClassMap<FileHeaderFastTrackRecord>
{
    public FileHeaderFastTrackRecordClassMap()
    {
        Id(FileHeaderFastTrackRecord.Expressions.Id);
        References(x => x.Package, "PackageId");
        Map(x => x.FileDateTime);
        Map(x => x.CustomerId);
        Map(x => x.TestPackage, "TestIndicator").CustomType(typeof (TestPackageUserType));
        Map(x => x.BankId);
    }
}

... und der gegebene individueller Benutzertyp:

public class TestPackageUserType : IUserType
{
    public bool Equals(object x, object y)
    {
        if (x == null)
            return false;
        return x.Equals(y);
    }

    public int GetHashCode(object x) { return x.GetHashCode(); }

    public object NullSafeGet(IDataReader rs, string[] names, object owner)
    {
        var testIndicator = (char) NHibernateUtil.Character.NullSafeGet(rs, names[0]);
        return testIndicator == 'T';
    }

    public void NullSafeSet(IDbCommand cmd, object value, int index)
    {
        if (value == null)
        {
            NHibernateUtil.Character.NullSafeSet(cmd, null, index);
            return;
        }
        if ((bool) value) { NHibernateUtil.Character.NullSafeSet(cmd, 'T', index); }
        else { NHibernateUtil.Character.NullSafeSet(cmd, 'P', index); }
    }

    public object DeepCopy(object value)
    {
        if (value == null) return true;
        return (bool) value;
    }

    public object Replace(object original, object target, object owner)
    {
        if (target != null && !(bool) target)
        {
            return 'P';
        }
        return 'T';
    }

    public object Assemble(object cached, object owner) { throw new NotImplementedException(); }

    public object Disassemble(object value)
    {
        if (value != null)
        {
            var testIndicator = (char[]) value;
            if (testIndicator[0] == 'P')
            {
                return false;
            }
        }
        return true;
    }

    public SqlType[] SqlTypes { get { return new[] {new SqlType(DbType.String)}; } }

    public Type ReturnedType { get { return typeof (bool); } }

    public bool IsMutable { get; private set; }
}

Ich erhalte die folgende Ausnahme und Stapel, wenn ich Update Merge die FastTrackPackage mit einem Kind FileHeaderFastTrackRecord:

NHibernate.PropertyAccessException: Invalid Cast (check your mapping for property type mismatches); setter of BNYM_Extranet.Common.RemEDIFastTrack.FileHeaderFastTrackRecord

at NHibernate.Tuple.Entity.PocoEntityTuplizer.SetPropertyValuesWithOptimizer(Object entity, Object[] values)
at NHibernate.Tuple.Entity.PocoEntityTuplizer.SetPropertyValues(Object entity, Object[] values)
at NHibernate.Persister.Entity.AbstractEntityPersister.SetPropertyValues(Object obj, Object[] values, EntityMode entityMode)
at NHibernate.Event.Default.DefaultMergeEventListener.CopyValues(IEntityPersister persister, Object entity, Object target, ISessionImplementor source, IDictionary copyCache)
at NHibernate.Event.Default.DefaultMergeEventListener.EntityIsDetached(MergeEvent event, IDictionary copyCache)
at NHibernate.Event.Default.DefaultMergeEventListener.OnMerge(MergeEvent event, IDictionary copyCache)
at NHibernate.Impl.SessionImpl.FireMerge(IDictionary copiedAlready, MergeEvent event)
at NHibernate.Impl.SessionImpl.Merge(String entityName, Object obj, IDictionary copiedAlready)
at NHibernate.Engine.CascadingAction.MergeCascadingAction.Cascade(IEventSource session, Object child, String entityName, Object anything, Boolean isCascadeDeleteEnabled)
at NHibernate.Engine.Cascade.CascadeToOne(Object child, IType type, CascadeStyle style, Object anything, Boolean isCascadeDeleteEnabled)
at NHibernate.Engine.Cascade.CascadeAssociation(Object child, IType type, CascadeStyle style, Object anything, Boolean isCascadeDeleteEnabled)
at NHibernate.Engine.Cascade.CascadeProperty(Object child, IType type, CascadeStyle style, Object anything, Boolean isCascadeDeleteEnabled)
at NHibernate.Engine.Cascade.CascadeCollectionElements(Object child, CollectionType collectionType, CascadeStyle style, IType elemType, Object anything, Boolean isCascadeDeleteEnabled)
at NHibernate.Engine.Cascade.CascadeCollection(Object child, CascadeStyle style, Object anything, CollectionType type)
at NHibernate.Engine.Cascade.CascadeAssociation(Object child, IType type, CascadeStyle style, Object anything, Boolean isCascadeDeleteEnabled)
at NHibernate.Engine.Cascade.CascadeProperty(Object child, IType type, CascadeStyle style, Object anything, Boolean isCascadeDeleteEnabled)
at NHibernate.Engine.Cascade.CascadeOn(IEntityPersister persister, Object parent, Object anything)
at NHibernate.Event.Default.DefaultMergeEventListener.CascadeOnMerge(IEventSource source, IEntityPersister persister, Object entity, IDictionary copyCache)
at NHibernate.Event.Default.DefaultMergeEventListener.EntityIsDetached(MergeEvent event, IDictionary copyCache)
at NHibernate.Event.Default.DefaultMergeEventListener.OnMerge(MergeEvent event, IDictionary copyCache)
at NHibernate.Event.Default.DefaultMergeEventListener.OnMerge(MergeEvent event)
at NHibernate.Impl.SessionImpl.FireMerge(MergeEvent event)
at NHibernate.Impl.SessionImpl.Merge(String entityName, Object obj)
at NHibernate.Impl.SessionImpl.Merge(Object obj)
at DAL.NHibernate.RepositoryWithTypedId`2.Update(T entity) in Repository.cs: line 72
at UnitTests.DAL.NHibernate.RemEDIFastTrack.FastTrackPackageRepositoryFixture.Update() in FastTrackPackageRepositoryFixture.cs: line 290 

Wenn ich die FastTrackPackage mit einem FileHeaderFastTrackRecord erhalte ich keinen Fehler Save und es spart richtig. Ich kann auch Save und Update FileHeaderFastTrackRecords unabhängig.

An dieser Stelle ich ratlos bin. Ich vermute, dass der benutzerdefinierten Benutzertyp, aber ich kann nicht sicher sein.

Wie kann ich dieses Problem diagnostizieren oder beheben?

Answer 1

Es stellt sich heraus, die ‚TestPackageUserType.Replace ()‘ Methode falsch war. Es wurde Zurückgeben eines char, wenn sie einen Bool und Code weiter unten den Stapel verschluckte sich an sie (vorausgesetzt, die kryptische Ausnahmemeldung) zurückkehren sollte. Mein neues Replace() Methode sieht wie folgt aus:

public object Replace(object original, object target, object owner)
{
  return original;
}