I have a class that stores some meta data about sort order and defaults for
Things. When I iterate over the dictionary, the keys are being loaded
one-by-one. In my iteration, the only thing I'm doing (see thingOrderAction)
is accessing it's mapped identity, so it shouldn't require loading the
entity. Yet at runtime, each entity key *is* being loaded! NHProf has
pointed at the *foreach* line itself (not the action). Is this an inherent
behavior of NHibernate dictionaries with entity keys?
public class ThingsOrder
{
private readonly IDictionary<Thing, ThingOrder> _thingOrders = new
Dictionary<Thing, ThingOrder>();
...
public virtual void ExportThingOrders(Action<Thing, ThingOrder>
thingOrderAction)
{
foreach (var relativeOrderPair in _thingOrders) // <-- Here's the
SELECTs!!!!!
{
thingOrderAction(relativeOrderPair.Key,
relativeOrderPair.Value);
}
}
}
public class ThingOrder
{
public int RelativeOrder { get { return _relativeOrder; } }
private readonly int _relativeOrder;
public bool Selected { get { return _selected; } }
private readonly bool _selected;
}
This is mapped as an IDictionary, keyed by an entity (Thing) and whose
value is a component (ThingOrder). Via Fluent NHibernate, that's:
HasMany(Reveal.Member<ThingsOrder, IDictionary<Thing,
ThingOrder>>("_thingOrders"))
.Table("usr_ThingsOrderRelativeOrders")
.KeyColumn("ID")
.Not.KeyNullable()
.AsEntityMap("ThingID")
.Not.Inverse()
.Component(m =>
{
m.Map(x => x.RelativeOrder);
m.Map(x => x.Selected);
})
.Cascade.AllDeleteOrphan()
.LazyLoad();
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