See http://www.richter-web.info/Wordpress/?p=132 which may help. It gives one method of accessing output parameters using NHibernate, but in a more ADO type approach.
John Davidson On Fri, May 7, 2010 at 8:42 AM, nadav s <[email protected]> wrote: > the LinFu proxy is failing when fatching a child entity that its father > (many-to-one) has a method with out parameter. > removing the out parameter from the method makes it work fine > > is it a known bug? > i don't know how hard it is to make it work cause i don't know > Reflection.Emit very well, but i think there at least should be a good error > method. > the inner exception message i get below is > just System.ArgumentNullException: Value cannot be null.Parameter name: type > > the outer exception is just "Creating a proxy instance failed". > took a lot of time to figure out that the out parameters method is the one > causing the trouble > > father entity: > > public class Department > { > public virtual int Id { get; set; } > public virtual IDictionary<int,Employee> Employees {get;set;} > > public virtual void OutParametersMethod(out string outString) > { > outString = ""; > } > } > > the child: > > public class Employee > { > public virtual int Id { get; set; } > > public virtual Department Department { get; set; } > } > > The mapping of the many to one (in Employee.hbm.xml) (is trivial): > > <many-to-one name="Department" class="TestVSOracle.Entities.Department, > TestVSOracle" > column="DEPARTMENT_ID" not-null="false" lazy="proxy"/> > > > > > > full exception.ToString(): > > > NHibernate.HibernateException: Creating a proxy instance failed ---> > System.ArgumentNullException: Value cannot be null.\r\nParameter name: type > > > at System.Reflection.Emit.ModuleBuilder.GetTypeTokenWorkerNoLock(Type type, > Boolean getGenericDefinition)\r\n at > System.Reflection.Emit.ModuleBuilder.GetTypeTokenInternal(Type type, Boolean > getGenericDefinition)\r\n at > System.Reflection.Emit.ILGenerator.Emit(OpCode opcode, Type cls)\r\n at > LinFu.DynamicProxy.DefaultMethodEmitter.SaveRefArguments(ILGenerator IL, > ParameterInfo[] parameters)\r\n at > LinFu.DynamicProxy.DefaultMethodEmitter.EmitMethodBody(ILGenerator IL, > MethodInfo method, FieldInfo field)\r\n at > LinFu.DynamicProxy.DefaultyProxyMethodBuilder.CreateProxiedMethod(FieldInfo > field, MethodInfo method, TypeBuilder typeBuilder)\r\n at > LinFu.DynamicProxy.ProxyFactory.CreateUncachedProxyType(Type[] > baseInterfaces, Type baseType)\r\n at > LinFu.DynamicProxy.ProxyFactory.CreateProxyType(Type baseType, Type[] > baseInterfaces)\r\n at LinFu.DynamicPro > xy.ProxyFactory.CreateProxy(Type instanceType, IInterceptor interceptor, > Type[] baseInterfaces)\r\n at > NHibernate.ByteCode.LinFu.ProxyFactory.GetProxy(Object id, > ISessionImplementor session) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate.ByteCode.LinFu\\ProxyFactory.cs:line > 22\r\n --- End of inner exception > > stack trace ---\r\n at > NHibernate.ByteCode.LinFu.ProxyFactory.GetProxy(Object id, > ISessionImplementor session) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate.ByteCode.LinFu\\ProxyFactory.cs:line > 30\r\n at > NHibernate.Tuple.Entity.AbstractEntityTuplizer.CreateProxy(Object id, > ISessionImplementor session) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Tuple\\Entity\\AbstractEntityTuplizer.cs:line > 236\r\n at > NHibernate.Persister.Entity.AbstractEntityPersister.CreateProxy(Object id, > ISessionImplementor session) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Persister\\Entity\\AbstractEntityPersister.cs:line > 3750\r\n at NHibernate.Event.Default.DefaultLoad > EventListener.CreateProxyIfNecessary(LoadEvent event, IEntityPersister > persister, EntityKey keyToLoad, LoadType options, IPersistenceContext > persistenceContext) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Event\\Default\\DefaultLoadEventListener.cs:line > 223\r\n at > NHibernate.Event.Default.DefaultLoadEventListener.ProxyOrLoad(LoadEvent > event, IEntityPersister persister, EntityKey keyToLoad, LoadType options) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Event\\Default\\DefaultLoadEventListener.cs:line > 154\r\n at > NHibernate.Event.Default.DefaultLoadEventListener.OnLoad(LoadEvent event, > LoadType loadType) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Event\\Default\\DefaultLoadEventListener.cs:line > 86\r\n at NHibernate.Impl.SessionImpl.FireLoad(LoadEvent event, LoadType > loadType) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Impl\\SessionImpl.cs:line > 2554\r\n at NHibernate.Impl.SessionImpl.InternalLoad(String entityName, > Object id, Boolean eager, Boole > an isNullable) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Impl\\SessionImpl.cs:line > 1427\r\n at NHibernate.Type.EntityType.ResolveIdentifier(Object id, > ISessionImplementor session) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Type\\EntityType.cs:line > 386\r\n at NHibernate.Type.EntityType.ResolveIdentifier(Object value, > ISessionImplementor session, Object owner) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Type\\EntityType.cs:line > 424\r\n at NHibernate.Engine.TwoPhaseLoad.InitializeEntity(Object entity, > Boolean readOnly, ISessionImplementor session, PreLoadEvent preLoadEvent, > PostLoadEvent postLoadEvent) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Engine\\TwoPhaseLoad.cs:line > 78\r\n at NHibernate.Loader.Loader.InitializeEntitiesAndCollections(IList > hydratedObjects, Object resultSetId, ISessionImplementor session, Boolean > readOnly) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Loader\\Loader.cs:line > 592\r\n at NHibernate.Loader.Loa > der.DoQuery(ISessionImplementor session, QueryParameters queryParameters, > Boolean returnProxies) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Loader\\Loader.cs:line > 460\r\n at > NHibernate.Loader.Loader.DoQueryAndInitializeNonLazyCollections(ISessionImplementor > session, QueryParameters queryParameters, Boolean returnProxies) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Loader\\Loader.cs:line > 236\r\n at NHibernate.Loader.Loader.DoList(ISessionImplementor session, > QueryParameters queryParameters) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Loader\\Loader.cs:line > 1650\r\n at > NHibernate.Loader.Loader.ListIgnoreQueryCache(ISessionImplementor session, > QueryParameters queryParameters) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Loader\\Loader.cs:line > 1569\r\n at NHibernate.Loader.Loader.List(ISessionImplementor session, > QueryParameters queryParameters, ISet`1 querySpaces, IType[] resultTypes) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Loa > der\\Loader.cs:line 1563\r\n at > NHibernate.Loader.Criteria.CriteriaLoader.List(ISessionImplementor session) > in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Loader\\Criteria\\CriteriaLoader.cs:line > 73\r\n at NHibernate.Impl.SessionImpl.List(CriteriaImpl criteria, IList > results) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Impl\\SessionImpl.cs:line > 2001\r\n at NHibernate.Impl.CriteriaImpl.List(IList results) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Impl\\CriteriaImpl.cs:line > 246\r\n at NHibernate.Impl.CriteriaImpl.List[T]() in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Impl\\CriteriaImpl.cs:line > 257\r\n at NHibernate.Criterion.QueryOver`1.List[U]() in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Criterion\\QueryOver.cs:line > 56\r\n at > NHibernate.Criterion.QueryOver`1.NHibernate.IQueryOver<TRoot>.List[U]() in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\NHibernate\\Criterion\\QueryOver.cs:line > 148\r\n at TestVSOracle.Program.LearnQuery > Over(ISession s) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\TestVSOracle\\Program.cs:line > 143\r\n at TestVSOracle.Program.Main(String[] args) in > D:\\nhibernate_svn\\trunk\\nhibernate\\src\\TestVSOracle\\Program.cs:line > 33" > > > -- > You received this message because you are subscribed to the Google Groups > "nhusers" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<nhusers%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/nhusers?hl=en. > -- You received this message because you are subscribed to the Google Groups "nhusers" group. 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