private void OnBeforeSaveDataSet(object sender, OnBeforeSaveDataSetEventArgs e)
{
if (e.Entity.IsMarkedForDeletion)
{
Transaction.Join(e.Parameters, $"Delete-DataSet-IsMarkedForDeletion-{e.Entity.GetType().Name}");
// It's possible for apps to register more than one DeleteHandler for an entity.
// In this case, OnBeforeSaveDataSet will come through here once for each handler (i.e. through same code, but different instance, because of the TEntity genericity)
// We can only delete an entity once... so we need to check to see if the entity has already been resolved in the delete stack before proceeding
// Also note: Can't use this.DeleteStack because we may not be the instance that did the delete! It's safest to get it from e.Parameters, anyway.
var deleteStack = e.Parameters.ContainsKey(ParameterKeys.DeleteStack) ? e.Parameters[ParameterKeys.DeleteStack] as DeleteStack : null;
if (deleteStack == null || !deleteStack.IsResolved(e.Entity))
{
try
{
dynamic db = ApplicationSettings.Container.Resolve <IEntityDataProvider>().GetDataProviderForEntity(e.Entity) as IDataProvider;
if (db != null)
{
db.Delete(e.Entity, e.FilterExpression, e.Context, e.Parameters, e.SkipSecurity);
}
// GRD-443
// There may be objects in the saveset that are not IsMarkedForDeletion, but which have been cascade deleted
// So we need to remove all deleted objects here, since otherwise the Save() will continue and the ORM will complain that we're trying to save things that no longer exist
{
deleteStack = e.Parameters.ContainsKey(ParameterKeys.DeleteStack) ? e.Parameters[ParameterKeys.DeleteStack] as DeleteStack : null;
foreach (var deleted in deleteStack.Resolved)
{
e.Entity.ObjectsDataSet.RemoveObject(deleted);
e.Context.RemoveObject(deleted);
}
}
}
catch (Exception ex)
{
Transaction.Leave(ex);
throw;
}
}
}
}
void OnBeforeSaveDataSet(object sender, OnBeforeSaveDataSetEventArgs e)
{
// If delete in progress, no action required
if (e.IsDeleteInProgress)
{
return;
}
if (e.Entity == null)
{
return;
}
string entityName = e.Entity.GetType().Name.Replace("DataObject", "");
switch (entityName)
{
default:
throw new GOServerException($"GOFileUploader, no handler found for entity type '{entityName}'");
}
}
