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PONHibernate - one-to-one Cascade Settings
 

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    <p>I have a one-to-one relationship between a Person class and an Employee. I expect the INSERT to cascade from the Person to the Employee. However, this does not happen. I've tried cascade='all' and cascade='save-update' on one-to-one relationship element, but it didn't work. </p> <p>The structures of the my objects are as follows:</p> <pre><code>public class Person { public virtual Employee Employee { get; set; } public virtual int Age { get; set; } public virtual string Forename { get; set; } public virtual string Surname { get; set; } public virtual int PersonID { get; set; } } public class Employee { public virtual int PersonID { get; set; } public virtual string PayRollNo { get; set; } public virtual int Holidays { get; set; } public virtual Person Person { get; set; } } </code></pre> <p>Mapping files shown below:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt; &lt;hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"&gt; &lt;class name="Employee, Employee.DAL" table="`Employee`" &gt; &lt;id name="PersonID" column="`PersonId`" type="int"&gt; &lt;generator class="native" /&gt; &lt;/id&gt; &lt;property type="string" length="30" name="PayRollNo" column="`PayRollNo`" /&gt; &lt;property type="int" name="Holidays" column="`Holidays`" /&gt; &lt;one-to-one name="Person" class="Person" cascade="all"/&gt; &lt;/class&gt; &lt;/hibernate-mapping&gt; &lt;?xml version="1.0" encoding="utf-8" ?&gt; &lt;hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"&gt; &lt;class name="Person, Employee.DAL" table="`Person`" &gt; &lt;id name="PersonID" column="`PersonId`"&gt; &lt;generator class="foreign"&gt; &lt;param name="property" &gt;Employee&lt;/param&gt; &lt;/generator&gt; &lt;/id&gt; &lt;property type="string" name="Forename" column="`Forename`" /&gt; &lt;property type="string" name="Surname" column="`Surname`" /&gt; &lt;property type="int" name="Age" column="`Age`" /&gt; &lt;one-to-one name="Employee" class="Employee" constrained="true" /&gt; &lt;/class&gt; &lt;/hibernate-mapping&gt; </code></pre> <p>Code for initiating the objects and saving them:</p> <pre><code>var employee = new Employee(); employee.Person = new Person { Employee = employee }; ISessionFactory sessionFactory = (new Configuration()).Configure().BuildSessionFactory(); employee.Person.Age = 27; employee.Person.Forename = "N"; employee.Person.Surname = "M"; employee.PayRollNo = "12"; employee.Holidays = 27; using (var session = sessionFactory.OpenSession()) { session.Save(employee); } </code></pre>
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