nhibernate mapping: A collection with cascade="all-delete-orphan" was no longer referenced
- by Chev
Hi All
I am having some probs with my fluent mappings. I have an entity with a child collection of entities i.e Event and EventItems for example.
If I set my cascade mapping of the collection to AllDeleteOrphan I get the following error when saving a new entity to the DB:
NHibernate.HibernateException : A collection with cascade="all-delete-orphan" was no longer referenced by the owning entity instance: Core.Event.EventItems
If I set the cascade to All it works fine? Below are my classes and mapping files:
public class EventMap : ClassMap<Event>
{
public EventMap()
{
Id(x => x.Id, "Id")
.UnsavedValue("00000000-0000-0000-0000-000000000000")
.GeneratedBy.GuidComb();
Map(x => x.Name);
HasMany(x => x.EventItems)
.Inverse()
.KeyColumn("EventId")
.AsBag()
.Cascade.AllDeleteOrphan();
}
}
public class EventItemMap : SubclassMap<EventItem>
{
public EventItemMap()
{
Id(x => x.Id, "Id")
.UnsavedValue("00000000-0000-0000-0000-000000000000")
.GeneratedBy.GuidComb();
References(x => x.Event, "EventId");
}
}
public class Event : EntityBase
{
private IList<EventItem> _EventItems;
protected Event()
{
InitMembers();
}
public Event(string name)
: this()
{
Name = name;
}
private void InitMembers()
{
_EventItems = new List<EventItem>();
}
public virtual EventItem CreateEventItem(string name)
{
EventItem eventItem = new EventItem(this, name);
_EventItems.Add(eventItem);
return eventItem;
}
public virtual string Name { get; private set; }
public virtual IList<EventItem> EventItems
{
get
{
return _EventItems.ToList<EventItem>().AsReadOnly();
}
protected set
{
_EventItems = value;
}
}
}
public class EventItem : EntityBase
{
protected EventItem()
{
}
public EventItem(Event @event, string name):base(name)
{
Event = @event;
}
public virtual Event Event { get; private set; }
}
Pretty stumped here. Any tips greatly appreciated.
Chev
