public virtual void StateChanged(StateEntry entry, EntityState oldState)
{
Check.NotNull(entry, "entry");
Check.IsDefined(oldState, "oldState");
// TODO: Lots to do here; for now just fixup references when entity begins tracking
if (oldState != EntityState.Unknown)
{
return;
}
// Handle case where the new entity is the dependent
foreach (var foreignKey in entry.EntityType.ForeignKeys)
{
var principalEntry = _stateManager.GetPrincipal(entry, foreignKey);
if (principalEntry != null)
{
DoFixup(foreignKey, principalEntry, new[] { entry });
}
}
// Handle case where the new entity is the principal
foreach (var foreignKey in _stateManager.Model.EntityTypes.SelectMany(
e => e.ForeignKeys.Where(f => f.ReferencedEntityType == entry.EntityType)))
{
var dependents = _stateManager.GetDependents(entry, foreignKey).ToArray();
if (dependents.Length > 0)
{
DoFixup(foreignKey, entry, dependents);
}
}
}
