I am trying to learn Nhibernate using fluent nhibernate mappings and i have created a small test app. Below is the code:

UserClass:

public class User
{
public string UserName { get; set; }
public string Password { get; set; }
public string Role { get; set; }
public string Email { get; set; }
public DateTime JoinDate { get; set; }
}

User Map Class:

public class UserMapping: ClassMap<User>
{
public UserMapping()
{
WithTable("UserT");
Not.LazyLoad();
Id(u => u.UserName);
Map(u => u.Password);
Map(u => u.Role);
Map(u => u.Email);
Map(u => u.JoinDate);
}
}

DAL User Class:

public class DALUser
{
public User GetUserByUserName(string userName)
{
ISessionFactory sessionFactory = Fluently.Configure()
.Database(MsSqlConfiguration.MsSql2005.ConnectionString(c => c.Server("ServerName").Database("DBName").TrustedConnection()))
.Mappings(m => m.FluentMappings.AddFromAssemblyOf<UserMapping>()).BuildSessionFactory();

ISession session = sessionFactory.OpenSession();
return session.Get<User>(userName);
}
}

Nunit Test Class:

[TestFixture]
public class UserTest
{
[Test]
public void CanGetUserByUserName()
{
DALUser user1 = new DALUser();
Assert.AreEqual("testUser", user1.GetUserByUserName("testUser").UserName);
}
}

When i try to run the test class i get the following error :Object reference not set to an instance of an object. I have placed a breakpoint in the GetUserByUserName method and noticed that its returning a null user. But i am not able to figure out why this is happening. Can anyone help me?

Hi coolguy18,

I'm not a fluent user but I'll try to help you.
Put all the stacktrace please. Maybe there's something in there.

[]s