I know it sounds kind of awkward.
But I'm want to have a field in the database that's only is used for
searching, and when insert I want to be able set that value, the value
will tell which type of entity that it represent so I can use an sort
on it. Right now I have an interface that tells that this domainobject
is synchronizable, (I sync between to databases one way), on the
serverside.
<class name="ISynchronizable" table="SynchronizableItems">
<id name="Id" type="System.Guid">
<generator class="assigned" />
</id>
<property name="Version" type="System.Int64" not-null="true" />
<property name="OrderPriority" type="System.Int32" insert="true"
update="true"/>
<joined-subclass name="Employee">.....
<joined-subclass name="Article">....
<joined-subclass name="Organization">....
</class>
</hibernate-mapping>
In the IInterceptor when an transaction starts I found out which is
the current highest versionnumber and adds one in the
GetNewVersionNumber method
public override void AfterTransactionBegin(ITransaction tx)
{
_currentVersionNumber = GetNewVersionNumber();
base.AfterTransactionBegin(tx);
}
Now in OnSave I set the version, but because my other question here on
http://groups.google.se/group/nhusers/browse_thread/thread/f7195afd957e88af
when I later retreive the objects they comes unordered so if the
entities has dependencies to each other in other words they need to be
saved in correct order to not cause a foreignkey exception I need them
to come in table order.
public override bool OnSave(object entity, object id, object[]
state, string[] propertyNames, IType[] types)
{
if (entity is ISynchronizable)
{
SetVersion(state, propertyNames,
_currentVersionNumber);
SetOrderPriority(entity, state, propertyNames);
return true;
}
}
private const string OrderPropertyName = "OrderPriority";
private void SetOrderPriority(object entity, object[] objects,
string[] strings)
{
if(entity is Employee)
{
objects[GetPropertyIndexForPropertyName(strings,
OrderPropertyName)] = 1;
return;
}
if (entity is Article)
{
objects[GetPropertyIndexForPropertyName(strings,
OrderPropertyName)] = 2;
return;
}
if (entity is Organization)
{
objects[GetPropertyIndexForPropertyName(strings,
OrderPropertyName)] = 3;
return;
}
}
Now when having that said, I really do not need the OrderPriority
property in my domainmodel, only need to set it in the interceptor :)
but with your earlier answer I guess its not possible.
I guess it would be nice to have it if I would have an extra field
that tells me who have made the change but I only want it persisted in
the db and not it my model.
On 29 Juli, 23:34, Fabio Maulo <[email protected]> wrote:
> Interesting concept.An insertable/*updatable* property but not in the model,
> very interesting.
> Which is the name of the pattern ?
>
> 2009/7/29 Niclas Pehrsson <[email protected]>
>
>
>
>
>
> > is there any alternative what Im is out for,
>
> > use the field as select/insert/update but not in the model?
> > So I just can access i from IInterceptor :).
>
> > On Jul 29, 8:42 pm, Fabio Maulo <[email protected]> wrote:
> > > access="none" mean that the property does not involved in insert nor
> > update
> > > but only in where clauses of queries.
>
> > > 2009/7/29 Niclas Pehrsson <[email protected]>
>
> > > > I I have tested to inherit EmptyInterceptor and registered it with the
> > > > sessionfactory.
> > > > In OnSave I want to add value to an property that has access="none"
> > > > but I can set the values in OnSave...
>
> > > > states[GetIndexForProperty("MyAccessNonePropertyName")] = false;
>
> > > > <property name="MyAccessNonePropertyName" type="System.Boolean"
> > > > access="none"/>
>
> > > > But it keeps getting the value null when inserting or updating, it
> > > > works fine if I have something else on access. Am I doing something
> > > > wrong?
>
> > > --
> > > Fabio Maulo
>
> --
> Fabio Maulo
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