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NHibernate SchemaExport.Execute does not create table

Learning NHibernate by following this tutorial Your first NHibernate based application and I got to the point where you call
new SchemaExport(cfg).Execute(true, true, false);
in a test method to export the schema (create the Product table) for verifying NHibernate was set up correctly
[Test]
public void Can_generate_schema()
{
var cfg = new Configuration();
cfg.Configure();
cfg.AddAssembly(typeof(Product).Assembly);
new SchemaExport(cfg).Execute(true, true, false);
}
The mapping
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="MyFirstNHibernateProject" namespace="MyFirstNHibernateProject.Domain">
<class name="Product">
<id name="Id">
<generator class="guid"></generator>
</id>
<property name="Name"></property>
<property name="Category"></property>
<property name="Discontinued"></property>
</class>
</hibernate-mapping>
The configuration
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
<session-factory>
<property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
<property name="dialect">NHibernate.Dialect.MsSqlCeDialect</property>
<property name="connection.driver_class">NHibernate.Driver.SqlServerCeDriver</property>
<property name="connection.connection_string">Data Source=MyFirstNHibernateProject.sdf</property>
<property name="show_sql">true</property>
</session-factory>
</hibernate-configuration>
The test passed and I can even see the output sql that create table but the table is not being created in the database (sql server compact), I refreshed the db in server explorer and it is still empty.
I have checked these posts
NHibernate SchemaExport not creating table
NHibernate SchemaExport does not create tables when “script” is false
NHibernate does not create Tables
but none of them solve my problem.
any ideas?

I would suggest to use full path in the connection string:
// instead of this
<property name="connection.connection_string"
>Data Source=MyFirstNHibernateProject.sdf</property>
// we should use
<property name="connection.connection_string"
>Data Source=C:\MyFirstNHibernateProject\MyFirstNHibernateProject.sdf</property>
Where the "C:\MyFirstNHibernateProject\" should be the full path to the "MyFirstNHibernateProject.sdf"
Also, in case you are suing CE 4.0 I would suggest to use this dialect:
<property name="dialect">NHibernate.Dialect.MsSqlCe40Dialect</property>

Why can't I call BuildSessionFactory since the update from NHibernate 2 to 3.3.1?

Today I updated my project to NHibernate 3.3 and replaced the NHibernate and the Iesi.Collections References.
I kept NHibernate.ByteCode.Castle
I removed the line
<property name="proxyfactory.factory_class">NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle</property> from my application config.
Now I get the error NotSupportedException in the last line of the following code:
NHibernate.Cfg.Configuration cfg = new NHibernate.Cfg.Configuration();
cfg.AddAssembly(Assembly.GetExecutingAssembly());
sessionFactory = cfg.BuildSessionFactory();
I googled a lot but I don't have a clue what's wrong. And ideas? Thanks!
my config:
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
<session-factory>
<property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
<property name="dialect">NHibernate.Dialect.PostgreSQLDialect</property>
<property name="connection.driver_class">NHibernate.Driver.NpgsqlDriver</property>
<property name="connection.connection_string">Server=myserverip;Port=myport;database=my_test;User Id=my_user;Password=mypwd;CommandTimeout=1;</property>
<!--<property name="proxyfactory.factory_class">NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle</property>-->
<property name="command_timeout">0</property>
</session-factory>

Just add this line to your xml config
<property name="hbm2ddl.keywords">none</property>
More details described here:
C# / Postgres / FluentNHibernate : configuring npgsql throws NotSupportedException

Nhibernate.Util causing ProxyFactoryFactoryNotConfiguredException when configuration line exists in config

We're building a project using NHibernate and Castle with the Validators project. I'm trying to upgrade it to the latest supported version between all of those. I've gotten the application working without errors, but I'm getting the exception below in a few of my unit tests. These are tests that don't actually touch the database in any way, but test functionality around the mapped entities.
NHibernate.Bytecode.ProxyFactoryFactoryNotConfiguredException:
The ProxyFactoryFactory was not configured.
Initialize 'proxyfactory.factory_class' property of the session-factory
configuration section with one of the available NHibernate.ByteCode providers.
Example:
<property name='proxyfactory.factory_class'>
NHibernate.ByteCode.LinFu.ProxyFactoryFactory, NHibernate.ByteCode.LinFu
</property>
Example:
<property name='proxyfactory.factory_class'>
NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle
</property>
[Continues down stack trace...]
Below is my config file:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2" >
<session-factory name="Linx2">
<property
name="connection.driver_class">NHibernate.Driver.NpgsqlDriver</property>
<property name="dialect">Linx2.Common.Framework.PostgreSQL83Dialect,
Linx2.Common.Framework</property>
<property name="connection.connection_string">[Hidden so I don't get fired.]</property>
<property name="adonet.batch_size">10</property>
<property name="show_sql">false</property>
<property name="use_outer_join">true</property>
<property name="command_timeout">60</property>
<property name="query.substitutions">true 1, false 0, yes 'Y', no 'N'</property>
<property name="proxyfactory.factory_class">
NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle
</property>
<property name="connection.release_mode">after_transaction</property>
<mapping assembly="NHibernate.Collection.Observable" />
</session-factory>
</hibernate-configuration>
I have the config mapping there, and it works in the application. I'm also including the NHibernate.ByteCode dll. However, in these tests it is ignored. I've tried manually starting the configuration in individual test and even stopped and confirmed mid-test that the configuration has the item. However, the exception is thrown in the code below on the IsInitialized call.
if (NHibernateUtil.IsInitialized(ChildAssociations))
{
ChildAssociations.ForEach(x => isValid = isValid && x.Element.IsValid(validatedObjects));
}
This worked previously with no problems in NHibernate build for 2.2. Any help would be greatly appreciated. I've been beating my head on it for the last 4 hours.

Apparently NHibernateUtil needs not only to have the configuration initialized, but needs the session factory to be built. I was able to get it to work by manually running the config and building the session factory in the tests. It wasn't a problem in the app because the session factory had been built before hand.
var cfg = new NHibernate.Cfg.Configuration().Configure();
var sessionFactory = cfg.BuildSessionFactory();

No persister error using NHibernate with ASP.NET, unit tests work correctly

I've got an interesting error with an ASP.NET webforms application I've been working on. I am using NHibernate (regular, not fluent), connecting to an sqlite database, with the following mapping and configuration:
<?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.SQLiteDriver</property>
<property name="connection.connection_string">Data Source=C:\Path\To\Database.db;Version=3</property>
<property name="dialect">NHibernate.Dialect.SQLiteDialect</property>
<property name="query.substitutions">true=1;false=0</property>
<property name="show_sql">true</property>
</session-factory>
</hibernate-configuration>
There are a number of entities, but the following is a simple example:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
assembly="XBMC.Data"
namespace="XBMC.Data.Model.Domain">
<class name="Genre" table="genre">
<id name="Id" column="idGenre" type="int">
<generator class="native"/>
</id>
<property name="Name" column="strGenre" type="string" />
</class>
</hibernate-mapping>
This file is configured as an Embedded resource. This goes hand in hand with:
public class Genre : IRecord
{
public virtual int Id { get; set; }
public virtual string Name { get; set; }
}
There is also an NHibernateHelper class which is used to grab a session (I've gleaned most of this from http://nhforge.org/wikis/howtonh/your-first-nhibernate-based-application.aspx which is a fantastic tutorial on getting started with NHibernate).
public class NHibernateHelper
{
private static ISessionFactory _sessionFactory;
private static ISessionFactory SessionFactory
{
get
{
if (_sessionFactory == null)
{
Configuration config = new Configuration();
config.Configure();
config.AddAssembly(typeof(IRecord).Assembly);
_sessionFactory = config.BuildSessionFactory();
}
return _sessionFactory;
}
}
public static ISession OpenSession()
{
return SessionFactory.OpenSession();
}
}
So far so good. I've been following a test-driven-development approach, and have some test-cases like the following:
[Test]
public void CanLoadGenre()
{
using (ISession session = NHibernateHelper.OpenSession())
{
Genre g = session.Get<Genre>(759);
Assert.That(g.Name, Is.EqualTo("Action"));
}
}
These work fine (I'm using the latest version of NUnit with TestDriven.NET FWIW). I can see the SQL generated by NHibernate and everything looks perfect. The problems start when I try to use my library in an ASP.NET application.
What I would like to do is bind a ListView to an ObjectDataSource. To do this I've written a GenreProvider and this just gets a list of the available Genre objects. In the unit tests, this works fine. As soon as anything NHibernate-related gets run in the ASP application, I get NHibernate.MappingException: No persister for: Genre exceptions thrown and everything goes awry.
Specifically, it fails on the following line (the return statement):
using (ISession session = NHibernateHelper.OpenSession())
return session.CreateCriteria(typeof(T).Name).List<T>();
(This is in a generic Repository class - however it works perfectly during unit tests).
So in summary: NHibernate seems to be working correctly during my unit tests, but fails when used in an ASP application. I'm confident that it is a problem in my configuration, but have scoured Google for 'no persister' errors (solutions have included ensuring the 'Embedded resource' setting for mapping files, various combinations of AddClass, AddAssembly etc on the configuration, setting <mapping assembly="..." /> in my config etc, but with no success) but most likely cannot see the wood for the trees.
Can anyone shed any light on this and stop me from going insane? (I can post more code if needed, have held back to prevent information overload!)
Thanks!

Try adding this in your hibernate-configuration file (or indeed your web.config if thats where it lives)
<property name="current_session_context_class">web</property>

nhibernate 3.0 Oracle connection through ODP.NET

Can someone tell me whats wrong with the nhibernate config below? Using the latest ODP.NET version.
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2" >
<session-factory>
<property name="connection.driver_class">NHibernate.Driver.OracleDataClientDriver</property>
<property name="connection.connection_string">DATA SOURCE=Oracle2;PERSIST SECURITY INFO=True;USER ID=***;PASSWORD=*****</property>
<property name="show_sql">true</property>
<property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
<property name="dialect">NHibernate.Dialect.Oracle9Dialect</property>
<property name="query.substitutions">true 1, false 0, yes 'Y', no 'N'</property>
</session-factory>
</hibernate-configuration>
I get the following error
Error 1 Test 'ODPNETNH.Tests.GenerateSchema_Fixture.Can_generate_schema' failed: NHibernate.MappingException : Could not compile the mapping document: ODPNETNH.Mappings.Vendor.hbm.xml
----> NHibernate.HibernateException : Could not instantiate dialect class NHibernate.Dialect.Oracle9Dialect
----> System.TypeLoadException : Could not load type NHibernate.Dialect.Oracle9Dialect. Possible cause: no assembly name specified.
at NHibernate.Cfg.Configuration.LogAndThrow(Exception exception)
at NHibernate.Cfg.Configuration.AddDeserializedMapping(HbmMapping mappingDocument, String documentFileName)
at NHibernate.Cfg.Configuration.AddValidatedDocument(NamedXmlDocument doc)
at NHibernate.Cfg.Configuration.ProcessMappingsQueue()

I had quite a few problems working with NHibernate and Oracle (ODP.NET).
At the end the only thing which worked for me was to reference Oracle.DataAccess.dll ver. 2.111, specifying Copy Local = true for the DLL.
In my Nhibernate config I've used Oracle10gDialect.
Last but not least I've used this new connection-string style:
<property name="connection.connection_string">
Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.1.1)(PORT=1522)))(CONNECT_DATA=(SERVICE_NAME=DIAP60FF)));User ID=myusername;Password=mypassword;</property>

I think I figured it out. Had to call Configure("hibernate.cfg.xml");