Stop fluent from generating double foreign keys

When I generate my database from fluent one of my tables as 2 of every field and I can't figure out why

like I have the fk keys how I want them too look(StudentId) but it also generates the keys how they want it to look(student_id)

   public class PermissionLevel
    {
        public virtual int PermissionLevelId { get; private set; }
        public virtual Student Student { get; set; }
        public virtual Course Course { get; set; }
        public virtual Permission Permission { get; set; }
    }

  public class PermissionMap : ClassMap<Permission>
    {
        public PermissionMap()
        {
            Table("Permissions");
            Id(x => x.PermissionId).Column("PermissionId");
 开发者_StackOverflow社区           Map(x => x.Name).NvarcharWithMaxSize().Not.Nullable();
            HasMany(x => x.PermissionLevels);
        }
    }


public class PermissionLevelMap : ClassMap<PermissionLevel>
{
    public PermissionLevelMap()
    {
        Table("PermissionLevels");
        Id(x => x.PermissionLevelId).Column("PermissionLevelId");
        References(x => x.Permission).Not.Nullable().Column("PermissionId");
        References(x => x.Student).Not.Nullable().Column("StudentId");
        References(x => x.Course).Not.Nullable().Column("CourseId");

    }
}

  public class StudentMap : ClassMap<Student>
    {
        public StudentMap()
        {
            Table("Students");
            Id(x => x.StudentId).Column("StudentId");
            HasMany(x => x.PermissionLevels);
        }
    }

all mine look like that and I get

_{(source: gyazo.com)}

ISessionFactory fluentConfiguration = Fluently.Configure()
                                                  .Database(MsSqlConfiguration.MsSql2008.ConnectionString(c => c.FromConnectionStringWithKey("Connection")))
                                                  .Mappings(m => m.FluentMappings.AddFromAssemblyOf<Framework.Data.Mapping.StudentMap>())
                                                  .ExposeConfiguration(BuidSchema)
                                                  .BuildSessionFactory();

I wasn't able to duplicate the issue, but try this: in your configuration, change the mappings to include a convention for the foreign key names like:

.Mappings(m => m.FluentMappings.AddFromAssemblyOf<Framework.Data.Mapping.StudentMap>().Conventions.Add(ForeignKey.EndsWith("Id"))

With that in place, you can remove the Column() call from the individual mapping files and achieve the same result. Since I can't reproduce your exact issue, I'm hoping this will also clear up the problem (I have a hunch that Fluent's AutoMap feature is getting in the mix somehow but it doesn't look like your code is allowing for this, so it really is just a hunch).