Hello all,
here are my two entities:
public class VideoCategory : BaseEntity<VideoCategory>
{
private readonly Iesi.Collections.Generic.ISet<VideoFolder>
folders = new HashedSet<VideoFolder>();
public VideoCategory()
{
}
public VideoCategory(string name)
{
Name = name;
}
public string Name { get; set; }
public IEnumerable<VideoFolder> Folders { get { return
folders; } }
}
public class VideoFolder : BaseEntity<VideoFolder>
{
private string path;
private readonly Iesi.Collections.Generic.ISet<VideoFile> videos =
new HashedSet<VideoFile>();
public VideoFolder()
{
}
public VideoFolder(string path)
{
Path = path;
}
public string Path { get; set; }
public string Name { get; private set; }
}
There is a Many-To-One relationship from VideoFolder to VideoCategory,
with a Cascade.AllDeleteOrphan.
Here is how the problem happens:
I create a new instance of VideoCategory, and save it in SessionA.
Once created, the id of this category is published to another view-
model, which queries the database to load the entity, in SessionB.
In SessionB, I create a new VideoFolder, add it to the category, and I
update the category in SessionB.
Now back in SessionA, if I then want to delete VideoCategory, I have
this exception:
"The primary key value cannot be deleted because references to this
key still exist"
I think it's normal, because SessionA doesn't know that the category
now has some folders.
I've added a step which allows the first view-model, owning SessionA,
to update the category after it has been updated by SessionB, before
it deletes the category, and in that step:
* I've tried to call Session.Merge, but I have : NonUniqueException :
a different object with the same identifier value was already
associated with the session:1, of entity VideoCategory
* I've tried to evict the category, then merge it, but I have the same
exception.
How can I resolve my problem?
Thanks in advance
Michael
PS: if I add the category, then add a folder to the category, then
close the view-model, then open it again and delete the category, I
don't have the exception
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