在NHibernate中将CreateSQLQuery与INSERT查询一起使用

Question

What is the state of the object, if it is added with using INSERT query? And how i can get this object same session?

Insert Object using native SQL

session.CreateSQLQuery("INSERT INTO table (...) VALUES (...)").ExecuteUpdate())

I know his Id, so using this for get:

sessison.Get<MyObjectType>(id)

but object is null, because the session is same and commit is still pending. What am I doing wrong?

PS Using CreateSQLQuery need, because my child object foo created based on his parent bar, but bar and foo have same Id, and used Table Per Concrete Class

Answer 1

Either commit the first transaction before attempting the .Get or you might be able to use .Load instead if you only need to associate this entity with another entity before an update or insert.

Writing raw sql queries will not save things in session as you are not dealing with entities.

Answer 2

I found solution.

In my case, ISessionProvider have Life style - perWebRequest . This means that session be commited after the end web request.

Next. After insert, we have no entity, but we can merge new entity, created based on data for insert, with current session.

session.Merge(new Entity(...));

or if you have parent entity in Persistence Context , you need do so:

session.Evict(parentEntity);
session.Merge(new Entity(...));

Evict remove entity with some id (child and parent have some id), else you will get an exception. This will merge entity with current session, and when you use sessison.Get<MyObjectType>(entityId) object doesn't be null.