remove() isn't implemented yet. While the simple operation you see below would be fine for a single listener on a single target, the targets we have which propagate to subclasses (mapper events, attribute events) would require a more elaborate system that can revisit everywhere the event has been propagated and remove it from there as well.
this is why "remove" isn't published in the docs right now. In our own tests I use a hack to remove an entire set of listeners at once, if this is a testing teardown scenario you're dealing with. Otherwise, ad-hoc removal on a per operation basis ? I knew someone would try it though damned if I could imagine what possible use there could be for that. If this is the case here, care to entertain me ? On Aug 18, 2011, at 10:10 AM, sandro dentella wrote: > Hi, > > I started to play with events to port a library to sqla 0.7. I managed to use > the 'listen' function but I failed on 'remove'. Looking at the signatures > they seem to be just the same, but here is what I get: > > In [7]: event.listen(obj.__class__.title, 'set', listen_cb) > > In [8]: event.remove(obj.__class__.title, 'set', listen_cb) > --------------------------------------------------------------------------- > TypeError Traceback (most recent call last) > > /home/misc/src/hg/py/sqlkit-pub/demo/sql/demo.py in <module>() > ----> 1 > 2 > 3 > 4 > 5 > > /misc/src/sqlalchemy/sqlalchemy/lib/sqlalchemy/event.pyc in remove(target, > identifie > 69 """ > 70 for evt_cls in _registrars[identifier]: > ---> 71 for tgt in evt_cls._accept_with(target): > 72 tgt.dispatch._remove(identifier, tgt, fn, *args, **kw) > 73 return > > TypeError: 'InstrumentedAttribute' object is not iterable > > > Did I misundertand the syntax or what else? > > > TIA > > sandro > *:-) > > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To view this discussion on the web visit > https://groups.google.com/d/msg/sqlalchemy/-/SqqNPsbu8DsJ. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/sqlalchemy?hl=en. -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
