Delete-Orphan mean delete-orphaned children.
To make a child an orphan you must nullify its parent-reference.
void RemoveChildAt(int position)
{
var child = children[position];
children.RemoveAt(position);
child.Parent= null;
}

2009/12/15 welzie <[email protected]>

> I have an Audit object that contains a IList<ClaimError> named
> "ClaimLineErrors".  The "ClaimLineErrors" are inserting correctly when
> the Audit object is saved.  However when I remove a ClaimLineError
> from the  "ClaimLineErrors" IList and update the Audit, the associated
> ClaimLineError record is NOT deleted from the db even thought it is
> was removed from the audit's IList<ClaimError> before saving.  What am
> I doing wrong?
>
> //CODE EXAMPLE
> //retrieve an already saved audit, audit is NOT connected to a session
> when returned
> Audit audit = AuditDataRepistory.FindAudit(99);
> //remove the 1st element in the list (for example assume list contains
> at least one object)
> audit.ClaimLineErrors.RemoveAt(0);
> //open a new session and persist audit
> AuditDataRepistory.save(audit);
>
> //MAPPINGS
> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
> assembly="Entity" namespace="ClaimAudit.Entity">
>  <class name="ClaimAudit.Entity.Audit" lazy="false" table="audits">
>    <id name="Id">
>      <generator class="native"/>
>    </id>
>    <property name="Active" type="Boolean"/>
>    <property name="DateReceived"/>
>    <property name="DateAudited"/>
>    <bag name="ClaimLineErrors" lazy="false" cascade="all-delete-
> orphan">
>        <key column="AuditId" not-null="true" update="true"/>
>        <one-to-many class="ClaimLineError"/>
>    </bag>
>  </class>
> </hibernate-mapping>
>
> <?xml version="1.0" encoding="utf-8" ?>
> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
> assembly="Entity" namespace="ClaimAudit.Entity">
>    <class name="ClaimAudit.Entity.ClaimLineError" lazy="false"
> table="claimlineerrors">
>        <id name="Id">
>            <generator class="native"/>
>        </id>
>        <many-to-one name="Audit" class="Audit" column="AuditId" not-
> null="true" lazy="false"></many-to-one>
>    </class>
> </hibernate-mapping>
>
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>
>


-- 
Fabio Maulo

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