NHibernate: No persister error - asp.net-mvc

Question

In my quest to further my knowledge, I'm trying to get get NHibernate running.
I have the following structure to my solution
Core Class Library Project
Infrastructure Class Library Project
MVC Application Project
Test Project
In my Core project I have created the following entity:
using System;
namespace Core.Domain.Model
{
public class Category
{
public virtual Guid Id { get; set; }
public virtual string Name { get; set; }
}
}
In my Infrastructure Project I have the following mapping:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
namespace="Core.Domain.Model"
assembly="Core">
<class name="Category" table="Categories" dynamic-update="true">
<cache usage="read-write"/>
<id name="Id" column="Id" type="Guid">
<generator class="guid"/>
</id>
<property name="Name" length="100"/>
</class>
</hibernate-mapping>
With the following config file:
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
<session-factory>
<property name="connection.driver_class">NHibernate.Driver.SqlClientDriver</property>
<property name="connection.connection_string">server=xxxx;database=xxxx;Integrated Security=true;</property>
<property name="show_sql">true</property>
<property name="dialect">NHibernate.Dialect.MsSql2008Dialect</property>
<property name="cache.use_query_cache">false</property>
<property name="adonet.batch_size">100</property>
<property name="proxyfactory.factory_class">NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle</property>
<mapping assembly="Infrastructure" />
</session-factory>
</hibernate-configuration>
In my test project, I have the following Test
[TestMethod]
[DeploymentItem("hibernate.cfg.xml")]
public void CanCreateCategory()
{
IRepository<Category> repo = new CategoryRepository();
Category category = new Category();
category.Name = "ASP.NET";
repo.Save(category);
}
I get the following error when I try to run the test:
Test method Volunteer.Tests.CategoryTests.CanCreateCategory threw exception: NHibernate.MappingException: No persister for: Core.Domain.Model.Category.
Any help would be greatly appreciated. I do have the cfg build action set to embedded resource.
Thanks!

Answer 1

The Build Action of the XML mapping file must be set to Embedded Resource in the Infrastructure assembly. When you use the following instruction in your config file: <mapping assembly="Infrastructure" /> it will look for mappings as embedded resources in this assembly.

Answer 2

I am guessing the problem is that your configuring your SessionFactory in your Test assembly without telling it that your mappings are in your Core assembly, something like
ISessionFactory factory = new Configuration().Configure()
.AddAssembly(typeof(Category).Assembly) <========***
.BuildSessionFactory();
If that doesn't help, post your configuration code.
Cheers,
Berryl