كيف يمكنني تشخيص / إصلاح هذا nhibernate.propertyaccessException؟

Question

بالنظر إلى خرائط أحذية أحذية بطلاقة التالية:

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);
    }
}

... ونوع مستخدم مخصص معين:

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; }
}

أتلقى الاستثناء التالي والمكدس عندما Update Merge fasttrackpackage مع filesheadertrackrecord:

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 

عندما Save The FastTrackPackage مع fileheaderastrackrecord لا أتلقى أي خطأ وحفظ بشكل صحيح. استطيع ايضا Save و Update fileheaderastrackrecords بشكل مستقل.

في هذه المرحلة أنا في حيرة. أظن أن نوع المستخدم المخصص، لكنني لا أستطيع أن أكون متأكدا.

كيف يمكنني تشخيص هذه المشكلة أو إصلاح هذه المشكلة؟

Answer 1

اتضح أن طريقة "TestPackageUserteph.Replace ()" كانت مخطئة. كان يعيد سحر عندما يجب أن يعود Bool و Code إلى أسفل المكدس المختنق عليه (توفير رسالة الاستثناء الخبيثة). جديدي Replace() الطريقة تبدو وكأنها هذه:

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