How to delete multiple db entities with Nhibernate?

Question

What is the best practice for this problem? Is there any batching features built-in?

Sample code:

using (ITransaction transaction = _session.BeginTransa         


        

Answer 1

HQL supports the IN clause, and if you use setParameterList you can even pass in a collection.

var idList = new List() { 5,3,6,7 };

_session.CreateQuery("DELETE MyDataClass o WHERE o.Id IN (:idList)")
    .SetParameterList("idList", idList)
    .ExecuteUpdate();

Be aware, like mentioned by ddango in a comment, that relationship cascades specified in your objects will not be executed since running an HQL query simply translates to a DB query and does not actually load any entity objects.