Mapping in configuration file when using Nhibernate's mapping by code - nhibernate

Question

I want to use mapping by code so I have a class Employee (namespace NHibernateTests.Classes) and a class EmployeeMappings (namespace NHibernateTests.Mappings)
My whole nhibernate configuration is set in an xml file hibernate.cfg.xml which currently goes like this:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
<session-factory>
<property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
<property name="connection.driver_class">NHibernate.Driver.OracleClientDriver</property>
<property name="connection.connection_string">User Id=NHIBERNATE;Password=NHIBERNATE;Data Source=XE</property>
<property name="show_sql">false</property>
<property name="dialect">NHibernate.Dialect.Oracle10gDialect</property>
<mapping assembly="NHibernateTests"/>
</session-factory>
</hibernate-configuration>
Which gives me the runtime error : No persister for: NHibernateTests.Classes.Employee
I tried (and error) some setting for mapping element but with no luck. I read how to set ressource for hbm.xml elements but couldn't find an answer for by code mapping.
namespace NHibernateTests.Classes
{
public class Employee
{
public virtual Address Address { get; set; }
public virtual string FirstName { get; set; }
public virtual int Id { get; set; }
}
}
namespace NHibernateTests.Mappings
{
public class EmployeeMappings : ClassMapping<Employee>
{
public EmployeeMappings()
{
this.Id(e => e.Id, mapper =>
{
mapper.Generator(Generators.HighLow);
});
}
}
}

Answer 1

With a mapping by code you should configure also your factory by code. There is one of few how-to:
NHibernate 3.2 Mapping by Code – Basic Mapping
cited code snippets (see above link for more details)
private static Configuration ConfigureNHibernate()
{
var configure = new Configuration();
configure.SessionFactoryName("BuildIt");
configure.DataBaseIntegration(db =>
{
db.Dialect();
db.Driver();
db.KeywordsAutoImport = Hbm2DDLKeyWords.AutoQuote;
db.IsolationLevel = IsolationLevel.ReadCommitted;
db.ConnectionStringName = "NH3";
db.Timeout = 10;
// enabled for testing
db.LogFormattedSql = true;
db.LogSqlInConsole = true;
db.AutoCommentSql = true;
});
var mapping = GetMappings();
configure.AddDeserializedMapping(mapping, "NHSchemaTest");
SchemaMetadataUpdater.QuoteTableAndColumns(configure);
return configure;
}
thew way how to get HbmMapping
private static HbmMapping GetMappings()
{
var mapper = new ModelMapper();
mapper.AddMappings(Assembly.GetAssembly(typeof(ProvinceMap)).GetExportedTypes());
var mapping = mapper.CompileMappingForAllExplicitlyAddedEntities();
return mapping;
}