FNH Mapping Overrides on HasMany - nhibernate

Question

Sorry for the wall of text please don't TLDR.
I have a very simple object model, basically it's
public class Colony
{
public virtual IList<Ant> Ants { get; set; }
}
public class Ant
{
public bool Dead { get; set }
public virtual IList<Egg> Eggs { get; set; }
}
public class Egg
{
public bool Dead { get; set }
public virtual int IncubationPeriod { get; set; }
}
You get the idea. So I have declared two mapping overrides.
public class ColonyMappingOverride : IAutoMappingOverride<Colony>
{
public void Override(AutoMapping<Colony> mapping)
{
mapping.HasMany(c => c.Ants).Where(x => !x.Dead);
}
}
public class AntMappingOverride : IAutoMappingOverride<Ant>
{
public void Override(AutoMapping<Ant> mapping)
{
mapping.HasMany(c => c.Eggs).Where(x => !x.Dead);
}
}
So when I grab data out of the DB I end up with inconsistent data.
For example:
Colony.Ants doesn't contain any dead ants (as expected), however Colony.Ants[0].Eggs contains all Eggs... dead or not.
If I call a Session.Refresh(Colony.Ants[0]) the dead eggs get removed.
Anyone know why lazy loading is ignoring the Where clause on the Ants mapping override?

Answer 1

it works for me using FNH 2.0.1.0 and NH 4.0.0.4000 and following fixed code
public class Colony : Entity
{
public Colony()
{
Ants = new List<Ant>();
}
public virtual IList<Ant> Ants { get; set; }
}
public class Ant : Entity
{
public Ant()
{
Eggs = new List<Egg>();
}
public virtual bool Dead { get; set; }
public virtual IList<Egg> Eggs { get; set; }
}
public class Egg : Entity
{
public virtual bool Dead { get; set; }
public virtual int IncubationPeriod { get; set; }
}
public class ColonyMappingOverride : IAutoMappingOverride<Colony>
{
public void Override(AutoMapping<Colony> mapping)
{
mapping.HasMany(c => c.Ants).Where(x => !x.Dead);
}
}
public class AntMappingOverride : IAutoMappingOverride<Ant>
{
public void Override(AutoMapping<Ant> mapping)
{
mapping.HasMany(c => c.Eggs).Where(x => !x.Dead);
}
}
code
var config = Fluently.Configure()
.Database(SQLiteConfiguration.Standard.InMemory().ShowSql().FormatSql())
.Mappings(m => m
.AutoMappings.Add(AutoMap.AssemblyOf<Ant>()
.Conventions.Add(DefaultCascade.All())
.Override<Colony>(new ColonyMappingOverride().Override)
.Override<Ant>(new AntMappingOverride().Override)
)
)
.BuildConfiguration();
using (var sf = config.BuildSessionFactory())
using (var session = sf.OpenSession())
{
new SchemaExport(config).Execute(true, true, false, session.Connection, null);
using (var tx = session.BeginTransaction())
{
session.Save(new Colony
{
Ants =
{
new Ant
{
Dead = true,
Eggs =
{
new Egg { Dead = true, IncubationPeriod = 1 },
new Egg { Dead = false, IncubationPeriod = 2 },
}
},
new Ant
{
Dead = false,
Eggs =
{
new Egg { Dead = true, IncubationPeriod = 1 },
new Egg { Dead = false, IncubationPeriod = 2 },
}
},
}
});
tx.Commit();
}
session.Clear();
var result = session.QueryOver<Colony>()
.Fetch(c => c.Ants).Eager
.SingleOrDefault();
Console.WriteLine(result.Ants[0].Eggs.All(e => !e.Dead));
}