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POFluent NHibernate cascade delete not working
 

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    <p>I've got a simple phone directory app using Fluent NHibernate 1.1. In the app, a "Person" object has many "PhoneNumber" objects. I'm trying to delete a Person and I want to cascade deletes to PhoneNumbers. I set a convention of <code>DefaultCascade.All()</code> after reading <a href="https://stackoverflow.com/questions/2242902/cascade-saves-with-fluent-nhibernate-automapping-old-anwser-still-valid">this answer</a>. However, attempting to delete the parent object still throws an exception--it appears that NHibernate is trying to update the child table to set the parent ID to null instead of just deleting the record:</p> <blockquote> <p>{"could not delete collection: [Person.PhoneNumbers#473][SQL: UPDATE phone_numbers SET person_id = null WHERE person_id = @p0]"}</p> </blockquote> <p>InnerException:</p> <blockquote> <p>{"Cannot insert the value NULL into column 'person_id', table 'directory.dbo.phone_numbers'; column does not allow nulls. UPDATE fails.\r\nThe statement has been terminated."}</p> </blockquote> <p>My Fluent config is:</p> <pre><code>public static ISessionFactory CreateSessionFactory() { return Fluently.Configure() .Database(MsSqlConfiguration.MsSql2008 .ConnectionString(ConfigurationManager.ConnectionStrings[ConfigurationManager.AppSettings["activeConnStr"]].ConnectionString)) .Mappings(m =&gt; m.FluentMappings.AddFromAssemblyOf&lt;Person&gt;() .Conventions.Add(DefaultCascade.All()) ) .BuildSessionFactory(); } </code></pre> <p>The parent class is:</p> <pre><code>public class Person { public Person() { PhoneNumbers = new List&lt;PhoneNumber&gt;(); EmailAddresses = new List&lt;string&gt;(); } public virtual int Id { get; private set; } public virtual string FirstName { get; set; } public virtual string LastName { get; set; } public virtual string Company { get; set; } public virtual IList&lt;PhoneNumber&gt; PhoneNumbers { get; set; } public virtual IList&lt;string&gt; EmailAddresses { get; set; } } </code></pre> <p>The child class (PhoneNumber) is:</p> <pre><code>public class PhoneNumber { public virtual string Number { get; set; } public virtual PhoneNumberType NumberType { get; set; } public virtual Person Person { get; set; } } </code></pre> <p>My code to delete a person is:</p> <pre><code>public static void DeletePerson(int id) { using (var session = Dalc.Instance.SessionFactory.OpenSession()) { using (var trans = session.BeginTransaction()) { session.Delete(session.Load&lt;Person&gt;(id)); trans.Commit(); } } } </code></pre> <p>What am I doing wrong?</p>
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