How can one delete NHibernate objects using a criteria?

Question

This must be a simple question. Given a criteria, how one deletes the entities satisfying the criteria?

The rationale:

HQL and NH criteria

Answer 1

In your repository/dao/persistencemanager/whatever class:

public IEnumerable FindAll(DetachedCriteria criteria)

        {

            return criteria.GetExecutableCriteria(Session).List();

        }

and then

public void Delete(DetachedCriteria criteria)

        {

            foreach (T entity in FindAll(criteria))

            {

                Delete(entity);

            }

        }

See Davy Brion's post Data Access with NHibernate.

Edit:

As far as I know, if you want to use Criteria you need to load the objects and iterate over them to delete them. Alternatively use HQL or pass in the SQL to the session.