1👍
Finally figured out what was going on.
I’ve got Django set to timezone aware, so it was giving me time zone aware dates from the database when there was a meeting attached to the section, but when there was no such meeting, I was providing the date as:
start = datetime.datetime.utcnow()
which is timezone unaware.
Dictsort was silently failing when comparing time zone aware and time zone unaware dates.
Now that I’ve switched to providing a timezone aware date, it’s working:
start = datetime.datetime.utcnow().replace(tzinfo=utc)
0👍
It looks like the implementation of the dictsort requires course.section_set.all to be an iterable.
However, if there aren’t any section attached to course, course.section_set.all would return None instead of an empty iterator, making course.section_set.all|dictsort fail.
You need to test course.section_set.count is postive and filter course.section_set.all conditionally.