ManyToOne Breaking Changes between NH 2.1 and 3.2

[sternr]

EntityA has a ManyToOne relationship to EntityB which uses the property-ref attribute.

In addition, the relationship is also mapped as cascade="none" and readonly.

When I try and save a new instance of EntityA:

EntityA a = new EntityA();

a.EntityB = new EntityB() { propertyRef = 33 };

session.Save(a);

I get "object is an unsaved transient instance - save the transient instance before merging".

In NHibernate 2.1 this worked as expected.

What am I missing?

[Asher Newcomer]

If cascade="none", why do you expect it to save EntityB for you?

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[Edgar Muniz Berlinck]

Try this:

Open one transaction (ITransaction)

do what you are doing

Commit the transction. 

Close the session.

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[sternr]

I dont want EntityB to be saved, I just want the value of propertyRef column in EntityA's table to be saved!

[Oskar Berggren]

2011/12/1 sternr <ste...@gmail.com>:

> I dont want EntityB to be saved, I just want the value of propertyRef column
> in EntityA's table to be saved!
>

So you already have EntityB in the database and what you are trying to
do is similar to

a.EntityB = session.Load<EntityB>(bId);
session.Save(a);

except that you want (NHibernate) to find the EntityB instance by the
value of the property used as property-ref, instead of by primary key.
Is this a correct understanding?

/Oskar

[sternr]

Basically yes.

Though I dont really need (NHibernate) to find the EntityB instance - the relationship between the entities is only by the property-ref property, so basically I dont need any additional data.

[Ricardo Peres]

You can do it with stateless sessions.

RP