On Thu, 2008-01-31 at 16:19 -0500, Michael Bayer wrote: > if you compare from the left to the right, it will work: > > table.c.column >= start_date > > the DateTime type itself is not part of the operation at the python > comparison level.
Also, just monkeypatching a timetuple = None onto the types.DateTime makes it work as well. I'd think that would be a bit less confusing to users. Regards, Cliff > On Jan 31, 2008, at 4:02 PM, Cliff Wells wrote: > > > > > This appears to be a bug in SA 0.4.2p3: > > > > > >> From the datetime docs: > > ''' > > Note: In order to stop comparison from falling back to the default > > scheme of comparing object addresses, datetime comparison normally > > raises TypeError if the other comparand isn't also a datetime object. > > However, NotImplemented is returned instead if the other comparand > > has a > > timetuple attribute. > > ''' > > > > It appears to me (although I need to do some more digging to verify) > > that types.DateTime lacks a timetuple attribute, so a TypeError is > > getting raised rather than returning NotImplemented. > > > > Regards, > > Cliff > > > > On Thu, 2008-01-31 at 12:41 -0800, Cliff Wells wrote: > >> I'm using SA 0.4 and Pylons 0.9.6. > >> > >> > >> Why would this: > >> > >> def by_date ( self, year, month, day ): > >> post_q = Session.query ( Post ) > >> start_date = datetime ( int ( year ) , int ( month ), int > >> ( day ) ) > >> end_date = start_date + timedelta ( 1 ) > >> c.post_index = post_q.filter ( > >> and_ ( [ start_date <= Post.c.post_date, > >> end_date > Post.c.post_date ] ) > >> ).all ( ) > >> > >> > >> Give me this traceback: > >> ... > >> and_ ( [ start_date <= Post.c.post_date, > >> TypeError: can't compare datetime.datetime to Column > >> > >> > >> I've also tried a couple variations such as > >> > >> c.post_index = post_q.filter ( > >> start_date <= Post.post_date, > >> end_date > Post.post_date > >> ).all ( ) > >> > >> and using post_table.c.post_date, etc. All of which give me the same > >> error or > >> > >> TypeError: can't compare datetime.datetime to InstrumentedAttribute > >> > >> I've only seen a couple examples on the ML of doing selects with > >> datetime objects and there isn't much in the way of documentation > >> that > >> I've seen (unless I'm blind or too dense to see it). > >> > >> Thanks, > >> Cliff > >> > >> > >>> > > > > > > > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com 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 -~----------~----~----~----~------~----~------~--~---
