NHibernate 4.x Cookbook - Second Edition

Creating class hierarchy mappings

It's common to have an inheritance hierarchy of subclasses. In this example, we will show you one method for mapping inheritance with NHibernate, called table-per-class hierarchy.

Getting ready

Complete the previous Mapping a class with XML example.

How to do it…

1. Create a new class named Book with the following code:

   namespace Eg.Core
   {
     public class Book : Product
     {
   
       public virtual string ISBN { get; set; }
       public virtual string Author { get; set; }
   
     }
   }

2. Create a new class named Movie with the following code:

   namespace Eg.Core
   {
     public class Movie : Product 
     {
   
       public virtual string Director { get; set; }
   
     }
   }

3. Change the Product mapping to match the XML shown in the following code:

   <?xml version="1.0" encoding="utf-8" ?> <hibernate-mapping ...