id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
10666	Aggregate with inherited columns does not work as expected	Julian Bez		"{{{
class Thing(models.Model):
    user = models.ForeignKey(""auth.user"")
    creation_date = models.DateTimeField(_('Creation date'), default=datetime.datetime.now)
    amount = models.PositiveIntegerField()
    
class Book(Thing):
    blabla = models.ForeignKey(""xyz"")

# does not work
Book.objects.filter(user=request.user).aggregate(Sum('amount'))
# does work
Book.objects.filter(user=request.user).annotate(Sum('amount'))
# does work
Book.objects.filter(user=request.user).aggregate(Sum('book_ptr__amount'))
}}}
"		closed	Database layer (models, ORM)	dev		fixed			Accepted	0	0	0	0	0	0