detach object

BIZ TMS Aurelius
1

How to delete in database without the error

 class EObjectAlreadyDetached with message 'Cannot remove or detach object of class TCustomer. The object is not in persistent context.'.

In this code I get the error.
aItem: T is converted from rest/json to TCustomer.
But I can't remove it.
procedure TRepositoryDatabase<T>.DeleteItem(aItem: T);
begin
  inherited;
  If assigned(aItem)
  then begin
    FManager.Remove(aItem);  //--> error detach object
    FManager.Flush;
  end;
end;

The next code works but I must do a load from the database.
That is not a nicesolution.
Is it possible to delete an item (TCustomer) without to call first the database.

procedure TRepositoryDatabase<T>.DeleteItem(aItem: T);
var
  oItem: T;
begin
  inherited;
  oItem:= self.GetItem(aItem.ID);
  If assigned(oItem)
  then begin
    FManager.Remove(oItem);
    FManager.Flush;
  end;
end;

Regards,
Christophe
2

The object must be in the Object Manager. Either you load it from database, or add it to the manager using Manager.Update(aItem) before calling Remove.


3

Thanks, this works