| 3 | 3 | > 1. The point of selected_related() is that it avoids doing an extra lookup. With the proposed fix, when the related object does not exist, accessing the attribute will cause the lookup to happen. This throws the `DoesNotExist` as it ought to, but the lookup shouldn't happen at all. I imagine that one way to fix this, while preserving the efficiency of select_related, is to use some other sentinel value that triggers a `DoesNotExist` exception inside the OneToOne descriptor. (Since querysets need to be pickled, remember that the simplest choice of sentinel value is a class). |