Hibernate version: 1.2.0
.Net version: 2
Studio Version: 2005 SP1

A question is about parent-child relation. I created simple example in which my problem can be repeated.

Parent table
Table1
(
id bigint identity, -- parent id
constraint PK_TABLE1 primary key (id)
)

Child table
Table2
(
id bigint identity, -- child id
pid bigint not null, -- parent id
constraint PK_TABLE2 primary key (id)
)

Relation
alter table Table2
add constraint FK_TABLE2_REFERENCE_TABLE1 foreign key (pid)
references dbo.Table1 (id)
on update cascade

Parent class
namespace winapp
{
class Root
{
private Int64 _id;
public virtual Int64 id
{
get { return _id; }
set { _id = value; }
}

private IList<Leaf> _leafList = new List<Leaf>();
public virtual IList<Leaf> LeafList
{
get { return _leafList; }
set { _leafList = value; }
}

public Root()
{
_leafList.Add(new Leaf());
}
}
}

Child class
namespace winapp
{
class Leaf
{
private Int64 _id;
public virtual Int64 id
{
get { return _id; }
set { _id = value; }
}

private Int64 _pid;
public virtual Int64 pid
{
get { return _pid; }
set { _pid = value; }
}
}
}

Parent class mapping
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="winapp" assembly="winapp">
<class name="Root" table="Table1">

<id name="id">
<column name="id" sql-type="bigint" not-null="true"/>
<generator class="native" />
</id>

<bag name="LeafList" inverse="true" cascade="all">
<key column="pid"/>
<one-to-many class="Leaf"/>
</bag>

</class>
</hibernate-mapping>

Child class mapping
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="winapp" assembly="winapp">
<class name="Leaf" table="Table2">

<id name="id">
<column name="id" sql-type="bigint" not-null="true"/>
<generator class="native" />
</id>

<many-to-one name="pid" class="Root" column="pid"/>

</class>
</hibernate-mapping>

Both mapping files are embedded resources of the project.

Main code

Root r = new Root();

ISession session = null;
ITransaction tx = null;
try
{
session = NHibernateHelper.GetCurrentSession();
tx = session.BeginTransaction();

session.Save(r);

if (tx != null)
tx.Commit();

MessageBox.Show("Done");
}
catch (Exception ex)
{
if (tx != null)
tx.Rollback();

MessageBox.Show("Error:\n" + ex.Message);
}
NHibernateHelper.CloseSession();

So, the question is - when I started the program and it executes session.Save(r), I suppose it stores 1 record in parent table and 1 record in child table and Table2.pid will be equal to Table1.id.
But I only receive "Unknown entity class: System.Int64" exception message...

If I omit cascade="all" in parent class mapping, the record in the parent table appears, but no record appears in child table.

I tried to use searching, but I don't find any message about such an exception.

What I am doing wrong?

Thanks for your time wasted on me,
Dennis.

And all what log4net said was:

DEBUG NHibernate.SQL - INSERT INTO Table1 DEFAULT VALUES; select SCOPE_IDENTITY()

No other messages were added in log file.

I took all the settings for log4net from src\NHibernate.Test\app.config as it was said in NHibernate's documentation. Maybe it is possible to switch on some exta log data?

You Leaf class should look like this:

Note the type of pid.

Karl, thanks a lot!
Dennis.