I've got a part/collection pairing of objects tables, and I'd like to
know the best way to manage the order of things inside the table.
Briefly:
class Activity(models.Model):
# etc...
class ActivityPart(models.Model):
order = models.IntegerField("order in parent", default=1)
activity = models.ForeignKey( Activity )
# etc.
What I want to do is, upon creation of an ActivityPart, figure out the
other parts already pointing to an Activity, and increase the order
number before saving the part if there are already ones with that
number. I also want the parent object to know about all its Parts. I'm
not sure what the best way to do either of these is... it seems like I
could do some or all of this in the ArrayPart's __init__ method, but
maybe there's a more Django-ish way?
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