private object AddElement <T>(IChangeTracker changeTracker, IEntityManager entityManager, T existing, object updateItem, object dbCollection)
{
if (!_isOwned)
{
updateItem = changeTracker.AttachAndReloadAssociatedEntity(updateItem);
}
else if (changeTracker.GetItemState(updateItem) == EntityState.Detached)
{
var instance = entityManager.CreateEmptyEntityWithKey(updateItem);
changeTracker.AddItem(instance);
changeTracker.UpdateItem(updateItem, instance);
foreach (var childMember in Members)
{
childMember.Update(changeTracker, entityManager, instance, updateItem);
}
updateItem = instance;
}
dbCollection.GetType().GetMethod("Add").Invoke(dbCollection, new[] { updateItem });
if (_isOwned)
{
changeTracker.AttachCyclicNavigationProperty(existing, updateItem, GetMappedNaviationProperties());
}
return(updateItem);
}
public object AttachAndReloadAssociatedEntity(object entity)
{
var localCopy = FindTrackedEntity(entity);
if (localCopy != null)
{
return(localCopy);
}
if (_context.Entry(entity).State == EntityState.Detached)
{
// TODO look into a possible better way of doing this, I don't particularly like it
// will add a key-only object to the change tracker. at the moment this is being reloaded,
// performing a db query which would impact performance
var entityType = ObjectContext.GetObjectType(entity.GetType());
var instance = _entityManager.CreateEmptyEntityWithKey(entity);
_context.Set(entityType).Attach(instance);
_context.Entry(instance).Reload();
AttachRequiredNavigationProperties(entity, instance);
return(instance);
}
if (GraphDiffConfiguration.ReloadAssociatedEntitiesWhenAttached)
{
_context.Entry(entity).Reload();
}
return(entity);
}