问Fluent Nhibernate外键映射

EN

public class PlayerBowlerTypeId
{
    public virtual int PlayerId { get; set; }

    public virtual int BowlerTypeId { get; set; }

    public override bool Equals(object obj)
    {
        return Equals(obj as PlayerBowlerTypeId);
    }

    private bool Equals(PlayerBowlerTypeId other)
    {
        if (ReferenceEquals(other, null)) return false;
        if (ReferenceEquals(this, other)) return true;

        return PlayerId == other.PlayerId &&
            BowlerTypeId == other.BowlerTypeId;
    }

    public override int GetHashCode()
    {
        unchecked 
        {
            int hash = GetType().GetHashCode();
            hash = (hash * 31) ^ PlayerId.GetHashCode();
            hash = (hash * 31) ^ BowlerTypeId.GetHashCode();

            return hash;
        }
    }
}

public class PlayerBowlerType
{
    public PlayerBowlerType()
    {
        Id = new PlayerBowlerTypeId();
    }

    public virtual PlayerBowlerTypeId Id { get; set; }
}

public class PlayerBowlerTypeMap : ClassMap<PlayerBowlerType>
{
    public PlayerBowlerTypeMap()
    {
        Table("TABLENAME");

        CompositeId<PlayerBowlerTypeId>(x => x.Id)
            .KeyProperty(x => x.BowlerTypeId, "COLUMNNAME")
            .KeyProperty(x => x.PlayerId, "COLUMNNAME");
    }
}