I have the following NHibernate mapping:
<class name="Person" proxy="Person" table="Person_">
<id name="OID" column="OID_" type="Guid">
<generator class="guid.comb"/>
</id>
<version name="Version" column="Version_"/>
<set name="Properties" lazy="true" inverse="true"
cascade="all-delete-orphan">
<key column="PersonOID_"/>
<one-to-many class="Property"/>
</set>
</class>
And the following C# code:
public class Property
{
public Person Owner;
}
public class Person
{
private ISet _properties;
public void AddProperty(Property property)
{
property.Owner = this;
_properties.Add(property);
}
public void RemoveProperty(Property property)
{
property.Owner = null;
_properties.Remove(property);
}
}
...
public void TransferProperty(Property p, Person fromPerson, Person toPerson)
{
//fromPerson.RemoveProperty(p);
toPerson.AddProperty(p);
}
A call to TransferProperty results in the entity version for toPerson
getting incremented, but no change to the entity version for fromPerson.
This is causing me a problem when multiple users call TransferProperty at
the same time -- because fromPerson version doesn't change, there is no
PersistenceException thrown when two users try to transfer property from
the same person at the same time.
Any thoughts on the best way to modify this code so that calling
TransferProperty will increment the entity versions for both toPerson and
fromPerson???
Thanks in advance!
Peter
P.S. I commented out the RemoveProperty call in TransferProperty, because
it was resulting in "ObjectDeletedException: deleted object would be
re-saved by cascade (remove deleted object from associations)".
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