Hi,
I have a problem with updating one-to-one mapped entity.
In first session I create the class with a property which I map one-
to-one. Cascading is set to "all".
In second I load the entity and try to _replace_ the property. By
replace I mean I set it to new instance.
What I expect is that the old instance/record will be deleted and
the new one inserted.
However what I see is only insert statement (which by subsequent
load in new session leads to exception:
NHibernate.HibernateException : More than one row with the given
identifier was found.)
Is there a way make the one-to-one mapping work as I expect or have
I misunderstood the whole idea of one-to-one mapping?
Thanks for any pointers, Stefan
--------------
public class Master
{
public virtual Guid Id { get; set; }
public virtual SingleChild SingleChild { get; set; } // one-to-one
}
public class SingleChild
{
public virtual Guid Id { get; set; }
public virtual Master Master { get; set; } // many-to-one
}
--------------
<class name="Data.Master, Data" table="MASTER" >
<id name="Id" column="ID">
<generator class="guid.comb"/>
</id>
<one-to-one name="SingleChild" property-ref="Master" cascade="all" /
>
</class>
<class name="Data.SingleChild, Data" table="SINGLE_CHILD" >
<id name="Id" column="ID">
<generator class="guid.comb"/>
</id>
<many-to-one name="Master" column="FK_MASTER" cascade="all" />
</class>
--------------
[Test]
public void VerifyOneToOneUpdate()
{
Guid gid;
// Create
using (var session = Global.Factory.OpenSession())
using (var tran = session.BeginTransaction())
{
var master = new Master();
master.SingleChild = new SingleChild {Master = master};
session.Save(master);
gid = master.Id;
tran.Commit();
}
// Update ??
using (var session = Global.Factory.OpenSession())
using (var tran = session.BeginTransaction())
{
var p = session.Get<Master>(gid);
Assert.NotNull(p);
p.SingleChild = new SingleChild { Master = p };
session.SaveOrUpdate(p);
tran.Commit();
}
// Reload
using (var session = Global.Factory.OpenSession())
using (var tran = session.BeginTransaction())
{
var p = session.Get<Master>(gid); //
NHibernate.HibernateException : More than one row with the given
identifier was found
Assert.NotNull(p);
}
}
--
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].
For more options, visit this group at
http://groups.google.com/group/nhusers?hl=en.
