Hi,
I have two models, as follow,
class Feed(models.Model):
user=ForeignKey(...)
class Comment(models.Model):
feed=ForeignKey(Feed, ...)
comment_text=TextField(...)
I want get last two comments for each feed, the statement is:
Comment.objects.all().extr(select={'row_num': 'row_number() over (partition
by feed_id order by id desc', where=['row_num<3']}
After run, Django told me these error:
....
Django Version: 1.8.2 Exception Type: ProgrammingError Exception Value:
column "row_num" does not exist
LINE 1: ...nt"."create_date" FROM "footprint_comment" WHERE (row_num < ...
....
But remove where parameter, it works.
Comment.objects.all().extr(select={'row_num': 'row_number() over (partition
by feed_id order by id desc'}
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