no persister for: Fluent nHibernate Exception - nhibernate

Question

i m getting the exception "No persister for: MVCTemplate.Common.Entities.User" . I Google this issue and apply all the solution i found. but all are useless for me.
Does anyone know what i m doing wrong ?
my User Class code is
public class User
{
public virtual Guid UserID { get; private set; }
public virtual string UserName { get; set; }
public virtual string Password { get; set; }
public virtual string FullName { get; set; }
public virtual string Email { get; set; }
public virtual TimeSpan LastLogin { get; set; }
public virtual bool IsActive { get; set; }
public virtual DateTime CreationDate { get; set; }
public virtual IList<UserInRole> UserInRoles { get; set; }
}
User Mapping :
public class UserMap : ClassMap<User>
{
public UserMap()
{
Table("tblUsers");
Id(user => user.UserID).GeneratedBy.GuidComb();
Map(user => user.UserName).Not.Nullable();
Map(user => user.Password).Not.Nullable();
Map(user => user.FullName).Not.Nullable();
Map(user => user.Email).Not.Nullable();
Map(user => user.LastLogin).Not.Nullable();
Map(user => user.IsActive).Nullable();
Map(user => user.CreationDate).Not.Nullable();
HasMany(user => user.UserInRoles);
}
}
FNH Configuration :
return Fluently.Configure()
.Database(FluentNHibernate.Cfg.Db.MsSqlConfiguration.MsSql2008
.ConnectionString(c => c.FromConnectionStringWithKey("FNHConnection"))
)
.Mappings(m =>
m.FluentMappings.AddFromAssemblyOf<User>())
.BuildSessionFactory();
Thanks

Answer 1

Double check that your mapping class is public.
Check that you have something like this in your fluent config....
.Mappings(m => m.FluentMappings.AddFromAssemblyOf<UserMap>())

Answer 2

The following will cause this error in simple terms:
private static void MainFN()
{
using (var session = sessionFactory.OpenSession())
{
using (var transaction = session.BeginTransaction())
{
Data[] balance = new Data[12];
for (int i = 0; i < 12; i++)
{
balance[i] = new Data();
balance[i].Test1 = "Example Data " + (i + 1).ToString();
balance[i].Test2 = i + 11;
balance[i].Test3 = (i % 2 == 0);
session.SaveOrUpdate(balance[i]); //Should be like this
}
//session.SaveOrUpdate(balance); //This will give the error