NHibernate, SQL Server - enum to int mapping -

i have class has enum type indicating whether message type email or sms. enum type defined:

public enum remindertype {     email = 1,     sms = 2 } 

the class utilizes type looks like:

public class reminder : entitybase {     public virtual string origin { get; set; }     public virtual string recipient { get; set; }     public virtual remindertype type { get; set; }     public virtual business business { get; set; }     public virtual datetime created { get; set; }      public reminder()     {         created = datetime.utcnow;     } } 

when try persist entity of type reminder database however, following error:

system.data.sqlclient.sqlexception (0x80131904): conversion failed when converting nvarchar value 'email' data type int. 

the backing field of type int, i'm not sure why nhibernate trying map string representation default. i'm using fluent nhibernate, , relevant mapping code is:

mappings.override<reminder>(map => {      map.map(x => x.type).column("type") }); 

i'm pretty sure default behavior of nhibernate map enums ints, why not doing in case? i'm using sql server 2005, if matters.

i doing same thing , got working so...

in case employeetype enum class

 map(x => x.employeetype, "employeetype_id").customtype(typeof (employeetype));