yes, you should use Load instead a new obj with only id.
2009/10/29 Stefan Sedich <[email protected]>
> Just curious about the below:
>
> I have the below mappings:
>
>
> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="Common"
> assembly="Common">
> <class name="Arm" table="Arms">
> <id name="Id" column="Id">
> <generator class="assigned" />
> </id>
> <property name="Desc" type="String" not-null="true" />
> </class>
> </hibernate-mapping>
>
> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="Common"
> assembly="Common">
> <class name="Person" table="People">
> <id name="Id" column="Id">
> <generator class="assigned" />
> </id>
> <property name="Name" type="String" not-null="true" />
> <many-to-one name="Arm" column="ArmId" />
> </class>
> </hibernate-mapping>
>
>
> I run the following with NH 1.2 and get:
>
> var arm = new Arm() {Id = 123};
> var person = new Person() {Id = 1, Name = "Bob", Arm = arm};
>
> Session.Save(person);
> Session.Flush();
>
>
> RESULT: NHibernate: INSERT INTO People (Name, ArmId, Id) VALUES (@p0, @p1,
> @p2); @p0 = 'Bob', @p1 = '123', @p2 = '1'
>
>
>
> Running with NH 2.1:
>
>
> NHibernate: SELECT arm_.Id, arm_.Desc as Desc0_ FROM Arms arm_ WHERE
> arm_....@p0;@p0
> = 123
>
> NHibernate: INSERT INTO People (Name, ArmId, Id) VALUES (@p0, @p1, @p2);@p0 =
> 'Bob', @p1 = NULL, @p2 = 1
> NHibernate: UPDATE People SET Name = @p0, ArmId = @p1 WHERE Id = @p2;@p0
> = 'Bob', @p1 = 123, @p2 = 1
>
>
> Now with NH 2.1 it selects the arm back and as it is null it sets the armid
> to null, but with NH 1.2 it updates with the ID in my transient object.
> Now what I want to understand is what the difference is, mostly the issue
> is trying to convert and old NH 1.2 app to 2.1 and having simmilar issues.
>
> I am aware that if in 2.1 if I use:
>
> var arm = Session.Load<Arm>(123);
> var person = new Person() { Id = 1, Name = "Bob", Arm = arm };
>
>
> Then it does as I expect, is it a case I need to use the above to do what I
> need?
>
>
>
> Cheers
> Stefan
>
> >
>
--
Fabio Maulo
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