NHibernate C＃内部联接n + 1

Question

Here is my simple С# code:

var chests = _session.CreateCriteria<GameCharacterChest>()
    .CreateAlias("GameCharacterEquipments", "equip", JoinType.InnerJoin)
    .Add(Restrictions.Eq("GameCharacterId", characterId))
    .List<GameCharacterChest>();

foreach (var chest in chests)
{
    var equip = chest.GameCharacterEquipments.FirstOrNull();
    if (equip != null)
    {
        var slot = (equip as GameCharacterEquipment).GameCharacterSlotTypeId;
    } 
}

In foreach cycle NHibernate sends SQL query to my DB. Why? information about GameCharacterEquipment already requested in first query by inner join. I have fluent map.

Answer 1

Try adding

.SetFetchMode("GameCharacterEquipments", FetchMode.Join)

or

.SetFetchMode("GameCharacterEquipments", FetchMode.Eager)

between the various calls (after the CreateAlias )

You probably have a lazy relationship defined on the GameCharacterEquipments .