c# - FluentNhibernate mapping when having two primary keys -

i use fluent nhibernate c# application , have basic question. know nhibernate mapping class should when have multiple primary keys.

here example showing how implement mapping , other model classes:

create table students(    id   int              not null,    name varchar (20)     not null,    age  int              not null,           primary key (id) ); 

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public class students {    public virtual int      id   { get; set; }    public virtual string   name { get; set; }    public virtual int      age  { get; set; } }   public class studentmap : classmap<students> {     public achivementmastermap()     {        id(x => x.id).column("id");        map(x => x.name).column("name");        map(x => x.age).column("age");        table("students");      } } 

let's assume have 2 primary keys on student table this

create table students(        id   int              not null,        name varchar (20)     not null,        age  int              not null,               primary key (id,name) ); 

so how write mapping class above table?

you don't have 2 primary keys, appear have composite primary key. think can use fluent nhibernate compositeid - this:

public class studentmap : classmap<students> {     public studentmap()     {             compositeid()                 .keyproperty(x => x.name, "id")                 .keyproperty(x => x.name, "name");              ...