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"
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