public void MustFirstSaveReferencedObjectBeforeSavingRefereningObject()
{
//given
Customer customer = Om.CreateCustomer();
Order order = Om.CreateOrderWith(customer);
//this would not happen if persistence cascaded from Order to Customer
NhAssert.VerifyInsertThrowsBecausePropertyReferencesUnsavedInstance(order, x => x.Customer);
}
public void CanAttachAssociatedObjectToDifferentSessions()
{
//note: although this is possible would highly recommend against doing this
//given
Customer customer = Om.CreateCustomer();
Order order1 = Om.CreateOrderWith(customer);
Order order2 = Om.CreateOrderWith(customer);
Nh.CommitInSameTempSession(session => {
DbFixture.Insert(customer);
DbFixture.Insert(order1);
DbFixture.Insert(order2);
});
var order1FromDb = Nh.GetFromDb <Order>(order1.Id);
var order2FromDb = Nh.GetFromDb <Order>(order2.Id);
NHibernateUtil.Initialize(order1FromDb.Customer);
Assert.That(order1FromDb.Customer, Is.SameAs(order2FromDb.Customer), "clarifying assumptions");
//evict all our object we have just loaded
Nh.CurrentSession.Clear();
//run test...
//attach first order to first session
ISession firstSession = Nh.CreateSession();
firstSession.Lock(order1FromDb, LockMode.None);
Assert.That(firstSession.ExistsInSession <Order>(order1FromDb.Id), Is.True, "order not attached");
Assert.That(firstSession.ExistsInSession <Customer>(order1FromDb.Customer.Id),
Is.False,
"customer not expected to attached");
//attach customer to second session
ISession secondSession = Nh.CreateSession();
secondSession.Lock(order1FromDb.Customer, LockMode.None);
Assert.That(secondSession.ExistsInSession <Customer>(order1FromDb.Customer.Id),
Is.True,
"customer not attached");
//attach second order to third session
ISession thirdSession = Nh.CreateSession();
thirdSession.Lock(order2FromDb, LockMode.None);
Assert.That(thirdSession.ExistsInSession <Order>(order2FromDb.Id), Is.True, "order not attached");
Assert.That(secondSession.ExistsInSession <Customer>(order1FromDb.Customer.Id),
Is.True,
"customer no longer attached to first session");
}
