Why the Override() doesnt' work in NHibernate Fluent - nhibernate

Question

I'm trying to set an unique constraint on the column LoginName of table User. So the following is my code:
public FluentConfiguration GetNHConfig()
{
var cfg = new FreeflyingConfiguration();
return Fluently.Configure()
.Database(MsSqlConfiguration.MsSql2005.ConnectionString(_connStr))
.Mappings(m => m.AutoMappings
.Add(AutoMap.AssemblyOf<LogOfArticle>(cfg))
.Add(AutoMap.AssemblyOf<LogOfUser>(cfg))
// here is the problem, I think
.Add(AutoMap.AssemblyOf<User>(cfg).UseOverridesFromAssemblyOf<UserMappingOverride>())
.Add(AutoMap.AssemblyOf<Role>(cfg))
.Add(AutoMap.AssemblyOf<Profile>(cfg))
.Add(AutoMap.AssemblyOf<Blog>(cfg))
.Add(AutoMap.AssemblyOf<Comment>(cfg)));
}
public class UserMappingOverride : IAutoMappingOverride<User>
{
public void Override(AutoMapping<User> mapping)
{
// breakpoint is set here and can be hit every time
mapping.Map(x => x.LoginName).Not.Nullable();
mapping.Map(x => x.Email).Unique();
mapping.Map(x => x.Profile.BlogUrl).Unique();
}
}
The tables can be generated, and the breakpiont on line "" can be hit every time. But there is no change in database, which means, generate the Unique constraint, whatever I use UpdateSchema() or BuildSchema().
BTW, no error when executing.
So it's harder to find the reason. But any suggestion is welcome!

Answer 1

Are User, Role, Profile etc really in different assemblies? If they aren't you only need one .Add(AutoMap.AssemblyOf<T>(). This could be your problem because it might be overwriting your overrides on subsequent calls. I'm not all that familiar with overrides but it's worth a shot.
return Fluently.Configure()
.Database(MsSqlConfiguration.MsSql2005.ConnectionString(_connStr))
.Mappings(m => m.AutoMappings
.Add(AutoMap.AssemblyOf<User>(cfg)
.UseOverridesFromAssemblyOf<UserMappingOverride>());