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PONHibernate.AssertionFailure: null identifier
 

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    <p>Before I kick my computer in to next week...</p> <p>I've checked out every other question about this, but none of them have the solution. I've stripped this code right back, but it's still not working.</p> <p>I'm getting this error when saving an object: NHibernate.AssertionFailure: null identifier</p> <p>This is my mapping file:</p> <pre><code>public class OrderMap : BaseMap&lt;Order&gt; { public SalesOrderMap() { Id(x =&gt; x.Id).Column("OrderId"); } } </code></pre> <p>This is the entity:</p> <pre><code>public class Order { public virtual int Id { get; protected set; } } </code></pre> <p>This is my test code:</p> <pre><code>Order order = new Order(); ISession session = SessionFactory.GetCurrentSession(); session.SaveOrUpdate(order); &lt;----EXCEPTION ON THIS LINE session.Flush(); </code></pre> <p>And then bang...it breaks with</p> <pre><code>[AssertionFailure: null identifier] NHibernate.Engine.EntityKey..ctor(Object identifier, String rootEntityName, String entityName, IType identifierType, Boolean batchLoadable, ISessionFactoryImplementor factory, EntityMode entityMode) +135 NHibernate.Engine.EntityKey..ctor(Object id, IEntityPersister persister, EntityMode entityMode) +70 NHibernate.Event.Default.AbstractSaveEventListener.PerformSaveOrReplicate(Object entity, EntityKey key, IEntityPersister persister, Boolean useIdentityColumn, Object anything, IEventSource source, Boolean requiresImmediateIdAccess) +545 NHibernate.Event.Default.AbstractSaveEventListener.PerformSave(Object entity, Object id, IEntityPersister persister, Boolean useIdentityColumn, Object anything, IEventSource source, Boolean requiresImmediateIdAccess) +322 NHibernate.Event.Default.AbstractSaveEventListener.SaveWithGeneratedId(Object entity, String entityName, Object anything, IEventSource source, Boolean requiresImmediateIdAccess) +130 NHibernate.Event.Default.DefaultSaveOrUpdateEventListener.SaveWithGeneratedOrRequestedId(SaveOrUpdateEvent event) +27 NHibernate.Event.Default.DefaultSaveOrUpdateEventListener.EntityIsTransient(SaveOrUpdateEvent event) +63 NHibernate.Event.Default.DefaultSaveOrUpdateEventListener.PerformSaveOrUpdate(SaveOrUpdateEvent event) +89 NHibernate.Event.Default.DefaultSaveOrUpdateEventListener.OnSaveOrUpdate(SaveOrUpdateEvent event) +188 NHibernate.Impl.SessionImpl.FireSaveOrUpdate(SaveOrUpdateEvent event) +259 NHibernate.Impl.SessionImpl.SaveOrUpdate(Object obj) +256 </code></pre> <p>if anyone's interested, this is how the session factory is built:</p> <pre><code>ControllerSource.SessionFactory = Fluently.Configure() .Database(MsSqlConfiguration.MsSql2008.ConnectionString(DataConfig.ConnectionString)) .Mappings(x =&gt; x.FluentMappings.Add(typeof (OrderMap))) .ExposeConfiguration(c =&gt;{ c.SetProperty("generate_statistics", "false"); c.SetProperty("current_session_context_class", contextClass); c.SetProperty("cache.use_second_level_cache", "false"); c.SetProperty("cache.use_query_cache", "false"); c.SetProperty("connection.release_mode", "on_close"); }) .BuildSessionFactory(); </code></pre>
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    1. COCan you post the create script for the order table?
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    2. COIt's currently just a table with the field in, auto increment, int, not nullable
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    3. CO(I think I've been a bit of a pillock........)
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