We use a modified version of NHibernate, and I'm trying to get back to
using an official release (either by finding the "proper" way to do things,
or by getting our changes into the main codebase).
We have found it helpful to have read-only access to the ActionQueue's list
of insertions, updates and deletes.
We use a flush event listener to intercept the flush, and then iterate over
the objects about to be inserted/updated/deleted.
Any insertions/updates that implement an interface we have defined,
IValidator, get validated. Likewise any deletions that implement
IDeleteValidator have their deletion validated.
In the event that this validation fails, we throw an exception and nothing
is saved to the database - this makes it easy for us to ensure that
everything in the database is in a consistent state. (We are careful to
ensure that the validation doesn't change any objects as they might be
missed in the flush).
The code we've added to ActionQueue is
public IEnumerable<object> Insertions
{
get { return insertions.OfType<EntityInsertAction>().Select(x
=> x.Instance); }
}
public IEnumerable<object> Updates
{
get { return updates.Select(x => x.Instance); }
}
public IEnumerable<object> Deletions
{
get { return deletions.Select(x => x.Instance); }
}
Is this likely to be accepted? If so I'll make a pull request
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