Thanks Stefan.
I'm now able to implement one of the interface properties explicitly,
but when I add the second I get:
TestCase 'MappingTests.FooTests.Test'
failed: System.ArgumentOutOfRangeException : Index was out of range.
Must be non-negative and less than the size of the collection.
Parameter name: index
at System.ThrowHelper.ThrowArgumentOutOfRangeException
(ExceptionArgument argument, ExceptionResource resource)
at System.ThrowHelper.ThrowArgumentOutOfRangeException()
at System.Collections.Generic.List`1.get_Item(Int32 index)
at System.Data.SQLite.SQLiteParameterCollection.GetParameter(Int32
index)
at
System.Data.Common.DbParameterCollection.System.Collections.IList.get_Item
(Int32 index)
at NHibernate.Type.AbstractStringType.Set(IDbCommand cmd, Object
value, Int32 index)
at NHibernate.Type.NullableType.NullSafeSet(IDbCommand cmd, Object
value, Int32 index)
at NHibernate.Type.NullableType.NullSafeSet(IDbCommand st, Object
value, Int32 index, Boolean[] settable, ISessionImplementor session)
at NHibernate.Persister.Entity.AbstractEntityPersister.Dehydrate
(Object id, Object[] fields, Object rowId, Boolean[] includeProperty,
Boolean[][] includeColumns, Int32 table, IDbCommand statement,
ISessionImplementor session, Int32 index)
at NHibernate.Persister.Entity.AbstractEntityPersister.Dehydrate
(Object id, Object[] fields, Boolean[] includeProperty, Boolean[][]
includeColumns, Int32 j, IDbCommand st, ISessionImplementor session)
at
NHibernate.Persister.Entity.AbstractEntityPersister.GeneratedIdentifierBinder.BindValues
(IDbCommand ps)
at NHibernate.Id.Insert.AbstractReturningDelegate.PerformInsert
(SqlCommandInfo insertSQL, ISessionImplementor session, IBinder
binder)
at NHibernate.Persister.Entity.AbstractEntityPersister.Insert(Object
[] fields, Boolean[] notNull, SqlCommandInfo sql, Object obj,
ISessionImplementor session)
at NHibernate.Persister.Entity.AbstractEntityPersister.Insert(Object
[] fields, Object obj, ISessionImplementor session)
at NHibernate.Action.EntityIdentityInsertAction.Execute()
at NHibernate.Engine.ActionQueue.Execute(IExecutable executable)
at
NHibernate.Event.Default.AbstractSaveEventListener.PerformSaveOrReplicate
(Object entity, EntityKey key, IEntityPersister persister, Boolean
useIdentityColumn, Object anything, IEventSource source, Boolean
requiresImmediateIdAccess)
at NHibernate.Event.Default.AbstractSaveEventListener.PerformSave
(Object entity, Object id, IEntityPersister persister, Boolean
useIdentityColumn, Object anything, IEventSource source, Boolean
requiresImmediateIdAccess)
at
NHibernate.Event.Default.AbstractSaveEventListener.SaveWithGeneratedId
(Object entity, String entityName, Object anything, IEventSource
source, Boolean requiresImmediateIdAccess)
at
NHibernate.Event.Default.DefaultSaveOrUpdateEventListener.SaveWithGeneratedOrRequestedId
(SaveOrUpdateEvent event)
at
NHibernate.Event.Default.DefaultSaveEventListener.SaveWithGeneratedOrRequestedId
(SaveOrUpdateEvent event)
at
NHibernate.Event.Default.DefaultSaveOrUpdateEventListener.EntityIsTransient
(SaveOrUpdateEvent event)
at
NHibernate.Event.Default.DefaultSaveEventListener.PerformSaveOrUpdate
(SaveOrUpdateEvent event)
at
NHibernate.Event.Default.DefaultSaveOrUpdateEventListener.OnSaveOrUpdate
(SaveOrUpdateEvent event)
at NHibernate.Impl.SessionImpl.FireSave(SaveOrUpdateEvent event)
at NHibernate.Impl.SessionImpl.Save(Object obj)
mapping:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
assembly="MappingTests" namespace="MappingTests">
<class name="ConcreteFoo">
<id name="Id">
<generator class="identity" />
</id>
<property name="MappingTests.IFoo1.Foo" />
<property name="MappingTests.IFoo2.Foo" />
</class>
</hibernate-mapping>
Appropriate parts of the test:
ConcreteFoo foo = new ConcreteFoo();
((IFoo1)foo).Foo = "foo1";
((IFoo2)foo).Foo = "foo2";
session.Save(foo);
Any ideas? I tried against SQL Server as well and got the same
exception. This exception looks to me like NHibernate legitimately
doesn't support explicit interface mapping with the same name.
On Mar 25, 3:27 pm, Stefan Steinegger <[email protected]> wrote:
> I have to admit that I didn't read the whole thread.
>
> When using reflection, a explicit implementation of a property has the
> name "InterfaceNamespace.Interface.PropertyName". So you should try
> this in the mapping file.
>
> About the design: I also tried explicit interface implementations and
> removed most of them afterwards. It's kind of awkward, it's not
> inherited and hard to understand.
>
> In my point of view it's always best to either declare the properties
> to be the same, so you have to implement them only once, or use
> different names.
>
> On the other hand you are right that explicit interface implementation
> is a .NET feature that needs to be used sometimes and should be
> supported by NH.
>
> On Mar 25, 5:37 pm, Joshua <[email protected]> wrote:
>
> > Thanks James and TigerShark.
>
> > I think what I'm hearing from you is that I should just map the two
> > properties in my entity to appropriately (read differently) named
> > properties and not implement the interfaces at all? Correct?
>
> > Being a newb with DDD and ORM's, do you think you could point me in
> > the right direction with how to design a DTO solution. Make whatever
> > naive assumptions about my situation you need to. I just need a
> > starting point, please.
>
> > Thanks.
>
> > On Mar 25, 10:00 am, James Gregory <[email protected]> wrote:
>
> > > I think we all know what you're trying to achieve, it's just not a very
> > > good
> > > idea to do it in an entity. It may not even be possible to do that kind of
> > > mapping with NHibernate. I don't know because it's never something that I
> > > would consider doing. If it's some obtuse requirement of a service you
> > > have
> > > no control over, then I'd personally create a DTO that interacts with it
> > > that implements the appropriate behavior, and map between a properly
> > > designed model and that DTO. Don't try to bring that mess down into the
> > > model too.
>
> > > On Wed, Mar 25, 2009 at 3:55 PM, Joshua <[email protected]> wrote:
>
> > > > I think my design is so odd to you that I'm going to simplify
> > > > further. One major question I have is how to implement explicit
> > > > interface implementations. My entity must implement two interfaces
> > > > with the same name in order to interact with the rest of the domain
> > > > for which the design is not up to me. I must persist all of the
> > > > relevant data. Here is my updated domain and skeletal mapping.
> > > > Please recommend how you were persist the "Foo" properties using
> > > > NHibernate, however seems best to you.
>
> > > > public interface IFoo1
> > > > {
> > > > string Foo
> > > > {
> > > > get;
> > > > set;
> > > > }
>
> > > > }
>
> > > > public interface IFoo2
> > > > {
> > > > string Foo
> > > > {
> > > > get;
> > > > set;
> > > > }
>
> > > > }
>
> > > > public class ConcreteFoo : IFoo1, IFoo2
> > > > {
> > > > public virtual int Id
> > > > {
> > > > get;
> > > > set;
> > > > }
>
> > > > string IFoo1.Foo
> > > > {
> > > > get;
> > > > set;
> > > > }
>
> > > > string IFoo2.Foo
> > > > {
> > > > get;
> > > > set;
> > > > }
> > > > }
>
> > > > <?xml version="1.0" encoding="utf-8" ?>
> > > > <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
> > > > assembly="MappingTests" namespace="MappingTests">
> > > > <class name="ConcreteFoo">
> > > > <id name="Id">
> > > > <generator class="identity" />
> > > > </id>
> > > > </class>
> > > > </hibernate-mapping>
>
> > > > [TestFixture]
> > > > public class FooTests
> > > > {
> > > > [Test]
> > > > public void Test()
> > > > {
> > > > Configuration cfg = new Configuration();
> > > > cfg = cfg.Configure();
> > > > ISessionFactory factory = cfg.BuildSessionFactory();
> > > > using (ISession session = factory.OpenSession())
> > > > {
> > > > new SchemaExport(cfg).Execute(false, true, false,
> > > > true, session.Connection, null);
>
> > > > ConcreteFoo foo = new ConcreteFoo();
> > > > ((IFoo1)foo).Foo = "foo";
>
> > > > session.Save(foo);
> > > > }
> > > > }
> > > > }
>
> > > > Thanks.
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