18
- References now won't flush the store or query the database when
19
the foreign key is None.
20
- When a reference is set to an object that wasn't yet inserted in
21
the database, the foreign key is immediately unset instead of
22
keeping the old value up to the flushing.
23
- Setting a reference to None works even if the previously referenced
24
object isn't in memory.
25
- When setting a reference, flush ordering is only enforced if the
26
key is dirty. This allows a number of changes that would
27
previously raise OrderLoopError.
28
- If the remote object in a back reference is removed, the reference