Why is the following not deleting the bagged child objects?

Hibernate version: 1.0.4

Mapping documents:

[ Hotel.hbm.xml ]
<bag name="ImagesUntyped" table="HotelsImage" lazy="false" cascade="all">
-->
<key column="HotelId"/>
<one-to-many class="Airtrade.Business.Hotels.Image, Airtrade.Business.Hotels"/>

...

[ Image.hbm.xml ]

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0" schema="dbo">
<class name="Airtrade.Business.Hotels.Image, Airtrade.Business.Hotels" table="HotelsImage">

<!-- business object id -->
<id name="Id" type="Int32" column="ImageId">
<generator class="identity" />
</id>

<many-to-one name="Hotel" class="Airtrade.Business.Hotels.Hotel, Airtrade.Business.Hotels" column="HotelId" />
.....

Name and version of the database you are using: MSSQL2000

The hotel.cs class is using ListWrapper like this:

public class Hotel
{
private IList untypedImages = new ArrayList();
public IList<Image> Images
{
get
{
return new ListWrapper<Image>(ImagesUntyped);
}
}

/// <summary>
/// Untyped version of the Images property for NHibernate
/// </summary>
public virtual IList ImagesUntyped
{
get
{
return untypedImages;
}
set
{
untypedImages = value;
}
}



The problem is when I assign a completely new list of Images to the hotel, the previous images that were loaded are not deleted. Why is that?

// get the hotel out of database
Hotel hotel = Session.Load(typeof(Hotel), hotelId);
// remove all previous images
hotel.ImagesUntyped.Clear();
// assign new images
foreach (Image hotelImage in newHotelImages)
{
hotelImage.Hotel = hotel; // bidirectional link
hotel.Images.Add(hotelImage);
}
Session.Update(hotel);

Now when I look in the database, the new images are only added to the hotel and the previous images where not deleted??

Hmm.. I found out that if I explicitly delete all the child-objects, they get deleted but I thought NHibernate bag would take care of that?

Anybody know why the child-objects are not deleted automatically?

Change to .