Nhibernate cascade - single entity issue
I'm going to use nuts trying to solve the cascading update / delete problem :-)
I have a parent entity with collection children. If I change the list of children in a separate parent by adding, removing, etc. - I don't see the updates cascading correctly in the Child collection.
File matching:
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
assembly="Domain"
namespace="Domain">
<class name="Parent" table="Parent" >
<id name="Id">
<generator class="guid.comb" />
</id>
<version name="LastModified"
unsaved-value="0"
column="LastModified"
/>
<property name="Name" type="String" length="250" />
<bag name="ParentChildren" lazy="false" table="Parent_Children" cascade="all-delete-orphan" inverse="true">
<key column="ParentId" on-delete="cascade" />
<one-to-many class="ParentChildren" />
</bag>
</class>
<class name="ParentChildren" table="Parent_Children">
<id name="Id">
<generator class="guid.comb" />
</id>
<version name="LastModified"
unsaved-value="0"
column="LastModified"
/>
<many-to-one
name="Parent"
class="Parent"
column="ParentId"
lazy="false"
not-null="true"
/>
</class>
</hibernate-mapping>
Test
[Test]
public void Test()
{
Guid id;
int lastModified;
// add a child into 1st session then detach
using(ISession session = Store.Local.Get<ISessionFactory>("SessionFactory").OpenSession())
{
Console.Out.WriteLine("Selecting...");
Parent parent = (Parent) session.Get(typeof (Parent), new Guid("4bef7acb-bdae-4dd0-ba1e-9c7500f29d47"));
id = parent.Id;
lastModified = parent.LastModified + 1; // ensure the detached version used later is equal to the persisted version
Console.Out.WriteLine("Adding Child...");
Child child = (from c in session.Linq<Child>() select c).First();
parent.AddChild(child, 0m);
session.Flush();
session.Dispose(); // not needed i know
}
// attach a parent, then save with no Children
using (ISession session = Store.Local.Get<ISessionFactory>("SessionFactory").OpenSession())
{
Parent parent = new Parent("Test");
parent.Id = id;
parent.LastModified = lastModified;
session.Update(parent);
session.Flush();
}
}
My guess is the fact that the product has been updated so that there are no children in its collection - the children will be deleted in the Parent_Child table. Problems seem to be related to the product joining a new session? Since the cascade is set to all-delete-orphan, my guess is that changes to the collection will propagate to the respective entities / tables? In this case, deletes?
What am I missing here?
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